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Technical University of Munich
Technical University of Munich

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PD Dr.-Ing. habil. Volker Pohl

Research Interests

  • Signal Processing
  • Communications
  • Signals and Systems
  • Detection and Estimation
  • Sampling Theory
  • Harmonic Analysis
  • Functional Analysis

Teaching

Links

arXiv - here you  find some pre-prints of my articles
Google Scholar - Google-Scholar
MathSciNet - Mathematical Reviews
Research Gate - again, some pre-prints can be found here

Publications

• Books          • Journal Papers          • Conference Articles          • Patents

Books and Book Chapters

  1. Sparse Deterministic and Stochastic Channels: Identification of Spreading Functions and Covariances
    A. Kaplan, D. G. Lee, G. E. Pfander and V. Pohl
    in Compressed Sensing in Information Processing. Editors: G. Kutyniok, H. Rauhut, R.J. Kunsch, Applied and Numerical Harmonic Analysis,  Birkhäuser, Cham  2022, pp. 105–144
  2. System Approximations and Generalized Measurements in Modern Sampling Theory
    H. Boche and V. Pohl
    in Sampling Theory, a Renaissance, Editor: Götz E. Pfander
    Springer-Birkhäuser,  2015, pp. 269–305
  3. Advanced Topics in System and Signal Theory: A Mathematical Approach
    V. Pohl and H. Boche
    Foundations in Signal Processing, Communications and Networking, Springer, Berlin,  2009, vol. 4

Journal Papers

  1. Characterization of the Complexity of Computing the Minimum Mean Square Error of Causal Prediction
    H. Boche, V. Pohl and H. V. Poor
    IEEE Trans. Information Theory, vol. 70, no. 9, pp. 6627–6638, Sep. 2024.
  2. Recent Progress in Computability for Prediction and Wiener Filter Theory
    H. Boche, V. Pohl and H. V. Poor
    Trans. A. Razmadze Math. Inst., vol. 176, no. 3, pp. 323–344, Dec. 2022.
  3. On Non-detectability of Non-computability and the Degree of Non-computability of Solutions of Circuit and Wave Equations on Digital Computers
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 68, no. 8, pp. 5561–5578, Aug. 2022.
  4. Data Transmission Over Linear Time-Varying Channels
    A. Kaplan, V. Pohl and D. G. Lee
    IEEE Trans. Signal Processing, vol. 70, pp. 3357–3370, Jun. 2022.
  5. Complexity Blowup in Simulating Analog Linear Time-Invariant Systems on Digital Computers
    H. Boche and V. Pohl
    IEEE Trans. Signal Processing, vol. 69, pp. 5005–5020, Aug. 2021.
  6. Turing Meets Circuit Theory: Not every Continous-Time LTI-System can be Simulated on a Digital Computer
    H. Boche and V. Pohl
    IEEE Trans. Circuits Syst. I, Reg. Papers, vol. 67, no. 12, pp. 5051–5064, Dec. 2020.
  7. On the Algorithmic Solvability of Spectral Factorization and Applications
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 66, no. 7, pp. 4574–4592, Jul. 2020.
  8. Calculating the Spectral Factorization and Outer Functions by Sampling-based Approximations – Fundamental Limitations
    H. Boche and V. Pohl
    J. Approx. Theory, vol. 257, Jun. 2020, 105450.
  9. Investigations on the Approximability and Computability of the Hilbert Transform with Applications
    H. Boche and V. Pohl
    Appl. Comput. Harmon. Anal., vol. 48, no. 2, pp. 706–730, Mar. 2020.
  10. On Approximations for Functions in the Space of Uniformly Convergent Fourier Series
    H. Boche and V. Pohl
    J. Approx. Theory, vol. 249, Jan. 2020, 105307.
  11. Identification of Channels with Single and Multiple Inputs and Outputs under Linear Constraints
    D. G. Lee, G. E. Pfander, V. Pohl and W. Zhou
    Linear Algebra Appl., vol. 581, pp. 435–470, Nov. 2019.
  12. Sampling and Reconstruction of Multiple-Input Multiple-Output Channels
    D. G. Lee, G. E. Pfander and V. Pohl
    IEEE Trans. Signal Processing, vol. 67, no. 4, pp. 961–976, Feb. 2019.
  13. Calculating the Hilbert Transform on Spaces with Energy Concentration: Convergence and Divergence Regions
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 65, no. 1, pp. 586–603, Jan. 2019.
  14. Limits of Calculating the Finite Hilbert Transform from Discrete Samples
    H. Boche and V. Pohl
    Appl. Comput. Harmon. Anal., vol. 46, no. 1, pp. 66–93, Jan. 2019.
  15. On the Strong Divergence of Hilbert Transform Approximations and a Problem of Ul’yanov
    H. Boche and V. Pohl
    J. Approx. Theory, vol. 204, pp. 34–60, April 2016.
  16. Phase Retrieval from Low-Rate Samples
    V. Pohl, F. Yang and H. Boche
    Sampl. Theory Signal Image Process., vol. 14, no. 1, pp. 71–99, 2015.
  17. Phaseless Signal Recovery in Infinite Dimensional Spaces using Structured Modulations
    V. Pohl, F. Yang and H. Boche
    J. Fourier Anal. Appl., vol. 20, no. 6, pp. 1212–1233, Dec. 2014.
  18. U-Invariant Sampling and Reconstruction in Atomic Spaces with Multiple Generators
    V. Pohl and H. Boche
    IEEE Trans. Signal Processing, vol. 60, no. 7, pp. 3506-3519, July 2012.
  19. On Causal Estimation From Bandlimited Stationary Sequences
    V. Pohl
    IEEE Trans. Information Theory, vol. 57, no. 8, pp. 5436–5443, Aug. 2011.
  20. U-Invariant Sampling: Extrapolation and Causal Interpolation from Generalized Samples
    T. Michaeli, V. Pohl, and Y. C. Eldar
    IEEE Trans. Signal Processing, vol. 59, no. 5, pp. 2085–2100, May 2011.
  21. Recovering Signals from Lowpass Data
    Y. C. Eldar and V. Pohl
    IEEE Trans. Signal Processing, vol. 58, no. 5, pp. 2636–2646, May 2010.
  22. Rate of Convergence in Approximating the Spectral Factor of Regular Stochastic Sequences
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 55, no. 12, pp. 5674–5681, Dec. 2009.
  23. Zero-Forcing Precoding for Frequency Selective MIMO Channels with H-infinity Criterion and Causality Constraint
    S. Wahls, H. Boche, and V. Pohl
    Signal Processing, vol. 89, no. 9, pp. 1754–1761, Sept. 2009.
  24. The Stability and Continuity Behavior of the Spectral Factorization in the Wiener Algebra with Applications in Wiener Filtering
    H. Boche and V. Pohl
    IEEE Trans. Circuits and Systems-I, vol. 55, no. 10, pp. 3063–3076, Nov. 2008.
  25. Continuity versus boundedness of the spectral factorization mapping
    H. Boche and V. Pohl
    Studia Mathematica, vol. 189, no. 2, pp. 131–145, 2008.
  26. Boundedness Behavior of the Spectral Factorization for Polynomial Data in the Wiener Algebra
    H. Boche and V. Pohl
    IEEE Trans. Signal Processing, vol. 56, no. 7, pp. 3100–3107, July 2008. 
  27. On the Calculation of the Hilbert Transform from Interpolated Data
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 54, no. 5, pp. 2358–2366, May 2008.
  28. On the Boundedness of the Spectral Factorization Mapping on Decomposing Banach Algebras
    H. Boche and V. Pohl
    SIAM J. Control Optim., vol. 47, no. 3, pp. 1415–1427, 2008.
  29. Robustness of the Inner-Outer Factorization and of the Spectral Factorization for FIR Data
    H. Boche and V. Pohl
    IEEE Trans. Signal Processing, vol. 56, no. 1, pp. 274–283, Jan. 2008.
  30. On the Behavior of Causal Projections with Applications
    H. Boche and V. Pohl
    Signal Processing, vol. 87, no. 12, pp. 3108–3130, Dec. 2007.
  31. Spectral Factorization for Polynomial Spectral Densities – Impact of Dimension
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 53, no. 11, pp. 4236–4241, Nov. 2007.
  32. Signal Representation and Approximation – Fundamental Limits
    H. Boche and V. Pohl
    European Trans. Telecommunications (ETT), vol. 18, no. 5, pp. 445–456, Aug. 2007.
  33. Behavior of the Spectral Factorization for Continuous Spectral Densities
    H. Boche and V. Pohl
    Signal Processing, vol. 87, no. 5, pp. 1078–1088, May 2007.
  34. On the Behavior of Disk Algebra Bases with Applications
    H. Boche and V. Pohl
    Signal Processing, vol. 86, no. 12, pp. 3915–3922, Dec. 2006.
  35. Structural Properties of the Wiener Filter – Stability, Smoothness Properties, and FIR Approximation Behavior
    H. Boche and V. Pohl
    IEEE Trans. Information Theory, vol. 52, no. 9, pp. 4272–4282, Sept. 2006.
  36. Characterization of Holomorphic Functions in Terms of their Moduli
    H. Boche and V. Pohl
    Complex Var. Theory Appl., vol. 50, no. 13, pp. 1025–1029, Oct. 2005.
  37. The Algebraic Structure of Frequency-Selective MIMO Channels
    V. Pohl, V. Jungnickel, and C. von Helmolt
    IEEE Trans. Signal Processing, vol. 53, no. 7, pp. 2498–2512, July 2005.
  38. Continuous Flat Fading MIMO Channels: Achievable Rate and the Optimal Length of the Training and Data Phase
    V. Pohl, P. Nguyen, V. Jungnickel, and C. von Helmolt
    IEEE Trans. Wireless Communications, vol. 4, no. 4, pp. 1889–1900, July 2005.
  39. Spectral Factorization in the Disk Algebra
    H. Boche and V. Pohl
    Complex Var. Theory Appl., vol. 50, no. 6, pp. 383–387, May 2005.
  40. Over-the-Air Demonstration of Spatial Multiplexing at High Data Rates using Real-Time Base-Band Processing
    V. Jungnickel, T. Haustein, A. Forck, U. Krüger, V. Pohl, and C. von Helmolt
    Advances in Radio Sciences, vol. 2, pp. 135–140, 2004.
  41. Electronic Tracking for Wireless Infrared Communications
    V. Jungnickel, A. Forck, T. Haustein, U. Krüger, V. Pohl, and C. von Helmolt
    IEEE Trans. Wireless Communications, vol. 2, no. 5, pp. 989–999, Sept. 2003.
  42. Capacity of MIMO Systems with Closely-Spaced Antennas
    V. Jungnickel, V. Pohl, and C. von Helmolt
    IEEE Communications Letters, vol. 7, no. 8, pp. 361–363, Aug. 2003.
  43. A Physical Model of the Wireless Infrared Communication Channel
    V. Jungnickel, V. Pohl, S. Nönnig, and C. von Helmolt
    IEEE J. Select. Areas Commun., vol. 20, no. 3, pp. 631–640, Apr. 2002.
  44. Integrating Sphere Diffuser for Wireless Infrared Communication
    V. Pohl, V. Jungnickel, and C. von Helmolt
    IEE Proc.-Optoelectronics, vol. 147, no. 4, pp. 281–285, Aug. 2000.

Conference, Symposium, and Workshop Papers

  1. Computing Orthogonal Projections Can Be Too Computational Expensive
    H. Boche, V. Pohl and H. V. Poor
    63rd IEEE Conf. on Decision and Control (CDC), Milan, Italy, Dec. 2024
  2. On the Complexity of Computing the Minimum Mean Square Error of Causal Prediction
    H. Boche, V. Pohl and H. V. Poor
    American Control Conf. (ACC), Toronto, Canada, July 2024
  3. The Wiener Theory of Causal Linear Prediction Is Not Effective
    H. Boche, V. Pohl and H. V. Poor
    62nd IEEE Conf. on Decision and Control (CDC), Singapore, Dec. 2023
  4. Complexity Blowup if Continuous-Time LTI Systems are Implemented on Digital Hardware
    H. Boche and V. Pohl
    60th IEEE Conf. on Decision and Control (CDC), virtual, Austin, TX, USA, Dec. 2021
  5. Message Transmission over Rapidly Time-Varying Channels
    A. Kaplan and V. Pohl
    46th IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Toronto, Canada, Jun. 2021
  6. A Message Transmission Scheme for Linear Time-Varying Multipath Channels
    A. Kaplan, V. Pohl, and D. G. Lee
    21st IEEE Intern. Workshop on Signal Process. Advances in Wireless Communications (SPAWC), Atlanta, GA, USA, May 2020
  7. Can Every Analog System be Simulated on a digital Computer?
    H. Boche and V. Pohl
    45th IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Barcelona, Spain, May 2020
  8. Computing Hilbert Transform and Spectral Factorization for Signal Spaces of Smooth Functions
    H. Boche and V. Pohl
    45th IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Barcelona, Spain, May 2020
  9. Message Transmission through Underspread Time-Varying Linear Channels
    A. Kaplan,  D.G. Lee, and V. Pohl
    45th IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Barcelona, Spainl, May 2020
  10. The Divergence of all Sampling-based Methods for Calculating the Spectral Factorization
    H. Boche and V. Pohl
    58th IEEE Conf. on Decision and Control (CDC), Nice, France, Dec. 2019
  11. Signal Transmission through an Unidentified Channel
    D. G. Lee, G. E. Pfander, and V. Pohl
    13th Intern. Conf. on Sampling Theory and Applications (SampTA), Bordeaux, France, July 2019
  12. Deterministic Matrices with a Restricted Isometry Property for Partially Structured Sparse Signals
    A. Kaplan, V. Pohl, and H. Boche
    13th Intern. Conf. on Sampling Theory and Applications (SampTA), Bordeaux, France, July 2019
  13. The Solvability Complexity Index of Sampling-based Hilbert Transform Approximations
    H. Boche and V. Pohl
    13th Intern. Conf. on Sampling Theory and Applications (SampTA), Bordeaux, France, July 2019
  14. On the Algorithmic Solvability of the Spectral Factorization and the Calculation of the Wiener Filter on Turing Machines
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT), Paris, France, July 2019
  15. A New Family of Low Coherence Finite Gabor Frames and Applications in Compressive Sampling
    A. Kaplan, V. Pohl, and H. Boche
    20th Intern. Workshop on Signal Process. Advances in Wireless Communications (SPAWC), Cannes, France, July 2019
  16. Energy Blowup of Sampling-based Approximation Methods
    H. Boche and V. Pohl
    44th IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, May 2019
  17. On the Approximability of the Hilbert Transform
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT), Vail, CO, USA, June 2018
  18. The Statistical Restricted Isometry Property for Gabor Systems
    A. Kaplan, V. Pohl, and D. G. Lee
    IEEE Statistical Signal Processing Workshop (SSP), Freiburg, Germany, June 2018
  19. On Compressive Sensing of Sparse Covariance Matrices using Deterministic Sensing Matrices
    A. Kaplan, V. Pohl, and D. G. Lee
    43rd IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, April 2018
  20. Identification of Multiple-Input Multiple-Output Channels under Linear Side Constraints
    D. G. Lee, G. E. Pfander, V. Pohl, and W. Zhou
    43rd IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, April 2018
  21. On the Computability of System Approximations under Causality Constraints
    H. Boche and V. Pohl
    43rd IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, April 2018
  22. Permissible Support Patterns for Identifying the Spreading Function of Time-Varying Channels
    D. G. Lee, A. Kaplan, and V. Pohl
    43rd IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, April 2018
  23. Phase Retrieval in Spaces of Analytic Functions on the Unit Disk
    V. Pohl, N. Li, and H. Boche
    12th Intern. Conf. on Sampling Theory and Applications (SampTA), Tallinn, Estonia, July 2017
  24. Sampling Type Reconstruction Processes for the Disk Algebra
    H. Boche and V. Pohl
    12th Intern. Conf. on Sampling Theory and Applications (SampTA), Tallinn, Estonia, July 2017
  25. Characterization of the Stability Range of the Hilbert Transform with Applications to Spectral Factorization
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT), Aachen, Germany, June 2017 
  26. Peak Value Blowup of Approximations of the Hilbert Transform of Signals with Finite Energy
    H. Boche and V. Pohl
    American Control Conf. (ACC), Seattle, WA, USA, May 2017
  27. Modulated Wideband Converter for Compressive Phase Retrieval of Bandlimited Signals
    V. Pohl,  H. Boche and C. Yapar
    11th Intern. ITG Conf. on Systems, Communications and Coding (SCC), Hamburg, Germany, Feb. 2017
  28. The Divergence Behavior of Adaptive Signal Processing Algorithms with Finite Search Horizon
    H. Boche and V. Pohl
    41st IEEE Intern. Conf. Acoustics, Speech and Signal Processing (ICASSP), Shanghai, China, March 2016
  29. A Class of Frames for Paley-Wiener spaces with Multiple Lattice Tiles Support
    E. Tampubolon, V. Pohl, and H. Boche
    11th Intern. Conf. on Sampling Theory and Applications (SampTA), Washington, DC, USA, May 2015
  30. On the Strong Divergence of Hilbert Transform Approximations from Sampled Data
    H. Boche and V. Pohl
    11th Intern. Conf. on Sampling Theory and Applications (SampTA), Washington, DC, USA, May 2015
  31. Fast Compressive Phase Retrieval from Fourier Measurements
    C. Yapar, V. Pohl, and H. Boche
    40th IEEE Intern. Conf. on Acoustics, Speech and Signal Processing (ICASSP), Brisbane, Australia, April 2015
  32. A Phase Retrieval Method for Signals in Modulation-Invariant Spaces
    V. Pohl, C. Yapar, H. Boche, and F. Yang
    39th IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Florence, Italy, May 2014
  33. Phase Retrieval via Structured Modulations in Paley-Wiener Spaces
    F. Yang, V. Pohl, and H. Boche
    10th Intern. Conf. on Sampling Theory and Applications (SampTA), Bremen, Germany, Jul. 2013 — Best Student Paper Award
  34. Sampling and Reconstruction in Sparse Atomic Spaces
    V. Pohl, E. Tampubolon, and H. Boche
    38th IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013
  35. Causal Reconstruction Kernels for Consistent Signal Recovery
    V. Pohl, F. Yang, and H. Boche
    20th European Signal Processing Conf. (EUSIPCO), Bucharest, Romania, Aug. 2012
  36. U-Invariant Sampling and Stable Reconstruction in Atomic Spaces
    V. Pohl and H. Boche
    37th IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Kyoto, Japan, March 2012 
  37. Signal Recovery in Shift-Invariant Spaces from Partial Frequency Data
    V. Pohl and Y. C. Eldar
    36th IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Prague, Czech Republic,  May 2011 
  38. Causal Signal Recovery from U-Invariant Samples
    T. Michaeli, Y. C. Eldar, and V. Pohl
    36th IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Prague, Czech Republic, May 2011 
  39. A Cognitive Radio Architecture based on sub-Nyquist Sampling
    D. Wieruch and V. Pohl
    5th IEEE Intern. Symposium on New Frontiers in Dynamic Spectrum Access Networks (DySPAN), Aachen, Germany, May 2011  
  40. Spectrum Sencing for Cognitive Radio Architectures based on sub-Nyquist Sampling Schemes
    V. Pohl, F. Suratman, A. M. Zoubir, and H. Boche
    Intern. ITG Workshop on Smart Antennas (WSA),  Aachen, Germany, Feb. 2011  
  41. Signal Recovery from Low Frequency Components
    Y. C. Eldar and V. Pohl
    44th Asilomar Conf. on Signals, Systems, and Computers,  Pacific Grove, CA, USA, Nov. 2010 
  42. Robustness of the Spectral Factorization for Polynomials
    H. Boche and V. Pohl
    7th Intern. ITG-Conf. on Source and Channel Coding (SCC) , Ulm Germany, Jan. 2008 
  43. On the Boundedness Behavior of the Spectral Factorization in the Wiener Algebra for FIR Data
    H. Boche and V. Pohl
    15th European Signal Processing Conf. (EUSIPCO) , Poznan, Poland, Sept. 2007 
  44. Approximation and Convergence Behavior of Spectral Factorization Methods
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT) , Nice, France, June 2007 
  45. There is No Free Lunch with Causal Approximations
    H. Boche and V. Pohl
    32nd IEEE Intern. Conf. on Acoustics, Speech, and Signal Processing (ICASSP) , Honolulu, HI, USA, Apr. 2007 
  46. Necessary and Sufficient Condition for the Continuity of all Causal Projections with Applications
    H. Boche and V. Pohl
    45th IEEE Conf. on Decision and Control (CDC) , San Diego, CA, USA, Dec. 2006  
  47. MIMO-ISI Channel equalization - Which Price We Have to Pay for Causality
    H. Boche and V. Pohl
    14th European Signal Processing Conf. (EUSIPCO) , Florence, Italy, Sept. 2006, invited  
  48. There exists no always convergent algorithm for the calculation of spectral factorization, Wiener filter, and Hilbert transform
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT) , Seattle, WA, USA, July 2006  
  49. MIMO - ISI Channels: Inner-Outer Factorization and Applications to Equalization
    H. Boche and V. Pohl
    Intern. Wireless Commun. and Mobile Computing Conf. (IWCMC), Vancouver, Canada, July 2006, invited  
  50. Characterization of the Behavior of Outer Functions with Applications to Spectral Factorization and System Design
    H. Boche and V. Pohl
    25th American Control Conf. (ACC), Minneapolis, MN, USA, June 2006 
  51. Basis Selection Problems for Different Performance Measures - Fundamental Limits
    H. Boche and V. Pohl
    6th Intern. ITG-Conf. on Source and Channel Coding (SCC), Munich, Germany, Apr. 2006  
  52. Analytical and Numerical Behavior of the Spectral Factorization
    H. Boche and V. Pohl
    6th Intern. ITG-Conf. on Source and Channel Coding (SCC), Munich, Germany, Apr. 2006 
  53. Relation between Robustness and Noise Enhancement of Causal Inverses for MIMO Systems
    V. Pohl, H. Boche, and N. Vucic
    Intern. ITG Workshop on Smart Antennas (WSA), Schloss Reisensburg, Germany, Mar. 2006  
  54. Approximation and Representation of Transfer Functions of MIMO Systems under Stability, Causality and Smoothness Constraints
    H. Boche and V. Pohl
    38th Southeastern Symposium on System Theory (SSST),  Cookeville, TN, USA, Mar. 2006  
  55. General Characterization of Bezout Space-Time Equalizers and Precoder
    H. Boche and V. Pohl
    IEEE Intern. Zürich Seminar on Commun., ETH Zürich, Switzerland, Feb. 2006  
  56. The Peak-to-Average Power Reduction Problem - Fundamental Limits and Connection with Fourier Analysis
    H. Boche and V. Pohl
    5th Vienna Intern. Conf. on Mathematical Modelling (MATHMOD), Vienna, Austria, Feb. 2006 
  57. Continuity of the Outer Factorization and Mapping Properties with Applications
    H. Boche and V. Pohl
    Joint 44th IEEE Conf. on Decision and Control and European Control Conf. (CDC-ECC), Seville, Spain, Dec. 2005 
  58. Spectral Factorization, Whitening- and Estimation Filter - Stability, Smoothness Properties and FIR Approximation Behavior
    H. Boche and V. Pohl
    IEEE Intern. Symposium on Inform. Theory (ISIT), Adelaide, Australia, Sept. 2005 
  59. General Structure of the Causal and Stable Inverses of MIMO Systems with ISI
    H. Boche and V. Pohl
    16th IEEE Intern. Symposium on Personal, Indoor and Mobile Radio Commun. (PIMRC), Berlin, Germany, Sept. 2005 
  60. Geometrical Characterization of the Optimal Causal Linear MIMO-Channel Inverse
    H. Boche and V. Pohl
    8th Intern. Symposium on Wireless Personal Multimedia Commun. (WPMC), Aalborg, Denmark, Sept. 2005  
  61. BIBO Norm in Spectral Factorization and Wiener Filtering
    H. Boche and V. Pohl
    9th Canadian Workshop on Inform. Theory (CWIT), Montreal, Canada, June 2005  
  62. A MIMO RAKE Receiver with Enhanced Interference Cancellation
    V. Jungnickel, H. Chen, and V. Pohl
    61st IEEE Vehicular Technology Conf. (VTC), Stockholm, Sweden, May 2005 
  63. A Multicode Space-Frequency RAKE Receiver
    H. Chen, V. Jungnickel, V. Pohl, and C. von Helmolt
    38th Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, USA, Nov. 2004 
  64. Optimal Length of the Training and Data Phase in Continuous Flat Fading MIMO Channels
    V. Pohl, V. Jungnickel, and C. von Helmolt
    IEEE Intern. Conf. on Commun. (ICC), Paris, France, June 2004  
  65. Performance of MIMO Rake Receivers in WCDMA Systems
    V. Jungnickel, Y. Chang, and V. Pohl
    IEEE Wireless Communications and Networking Conf. (WCNC), Atlanta, GA, USA, March 2004  
  66. How Often Channel Estimation is Needed in MIMO Systems
    V. Pohl, P. Nguyen, V. Jungnickel, and C. von Helmolt
    IEEE Global Telecommun. Conf. (GLOBECOM), San Francisco, CA, USA, Dec. 2003 
  67. Limits of the Achievable Symbol Rate in Flat Fading MIMO Systems
    V. Pohl, P. Nguyen, V. Jungnickel, and C. von Helmolt
    14th IEEE Intern. Symposium on Personal, Indoor and Mobile Radio Commun. (PIMRC), Bejing, China, Sept. 2003  
  68. The Effect of Path Loss Variations on the Capacity of MIMO Systems
    V. Pohl, V. Jungnickel, T. Haustein, and C. von Helmolt
    European Personal Mobile Commun. Conf. (EPMCC), Glasgow, UK, Apr. 2003  
  69. Link adaptation in a multi-antenna system
    V. Jungnickel, T. Haustein, V. Pohl, and C. von Helmolt
    57th IEEE Vehicular Technology Conf. (VTC), Jeju Island, Korea, Apr. 2003  
  70. Experiments on the element spacing in multi-antenna systems
    V. Jungnickel, V. Pohl, and C. von Helmolt
    57th IEEE Vehicular Technology Conf. (VTC), Jeju Island, Korea, Apr. 2003  
  71. Over-the-air demonstration of spatial multiplexing at high data rates using real-time base-band processing
    V. Jungnickel, A. Forck, T. Haustein, U. Krüger, V. Pohl, and C. von Helmolt
    Kleinheubacher Tagung, Miltenberg, Germany, 2003, invited 
  72. High capacity antennas for MIMO radio systems
    V. Jungnickel, V. Pohl, H. Nguyen, U. Krüger, T. Haustein, and C. von Helmolt
    5th Int. Symp. Wireless Personal Multimedia Communications (WPMC), Honolulu, Hawaii, USA, Oct. 2002  
  73. Zero Forcing Equalizing Filter for MIMO Channels with Intersymbol Interference
    V. Pohl, V. Jungnickel, E. Jorswieck, and C. von Helmolt
    13th IEEE Intern. Symposium on Personal, Indoor and Mobile Radio Commun. (PIMRC), Lissabon, Portugal, Sept. 2002  
  74. On the performance of signal detection algorithms in flat-fading and frequency-selective MIMO channels
    E. Jorswieck, V. Jungnickel, T. Haustein, V. Pohl, and C. von Helmolt
    55th IEEE Vehicular Technology Conf. (VTC), Birmingham, AL, USA, May 2002  
  75. Antenna Spacing in MIMO Indoor Channels
    V. Pohl, V. Jungnickel, T. Haustein, and C. von Helmolt
    55th IEEE Vehicular Technology Conf. (VTC), Birmingham, AL, USA, May 2002 
  76. Performance of MIMO Systems with Channel Inversion
    T. Haustein, C. von Helmolt, E. Jorswieck, V. Jungnickel, and V. Pohl
    55th IEEE Vehicular Technology Conf. (VTC), Birmingham, AL, USA, May 2002  
  77. Performance of a MIMO System with Overlay Pilots
    V. Jungnickel, T. Haustein, E. Jorswieck, V. Pohl, and C. von Helmolt
    IEEE Global Telecommun. Conf. (GLOBECOM), San Antonio, TX , USA, Nov. 2001 
  78. Bit Error Rates for a MIMO System in Rayleigh and Rician Channels
    T. Haustein, E. Jorswieck, V. Jungnickel, U. Krüger, V. Pohl, and C. von Helmolt
    54th IEEE Vehicular Technology Conf. (VTC), Atlantic City, NJ, USA, Oct. 2001  
  79. A Radio System with Multi-Element Antennas
    V. Jungnickel, V. Pohl, U. Krüger, C. von Helmolt, T. Haustein, and S. Stanczak
    53rd IEEE Vehicular Technology Conf. (VTC), Rhodes Island, Greece, May 2001  
  80. Wireless Infrared Communications Beyond 100 Mbit/s: System Design, Transmission Experiments and Potential
    V. Jungnickel, A. Forck, T. Haustein, U. Krüger, V. Pohl, and C. von Helmolt
    5th World Multiconf. on Systemics, Cybernetics and Informatics, Orlando, FL, USA, 2001 invited  
  81. A Channel Model for Wireless Infrared Communication
    V. Pohl, V. Jungnickel, and C. von Helmolt
    11th IEEE Intern. Symposium on Personal, Indoor and Mobile Radio Commun. (PIMRC), London, U.K., Sept. 2000  
  82. Integrating Sphere Diffuser for Wireless Infrared Communication
    V. Pohl, V. Jungnickel, R. Hentges, and C. von Helmolt
    IEE Colloquium on Optical Wireless Commun., London, U.K., June 1999  

Patents

  1. Adaptive Signal Processing Method in a MIMO System
    T. Haustein, C. von Helmolt, E. Jorswieck, V. Jungnickel, U. Krüger, V. Pohl, G. Wunder
    World patent: WO/2003/005606 (Jan. 16, 2003),   European patent: EP 1402657 (June 1, 2005),   US patent: US 7366520 (April 29, 2008)
  2. Indoor Radio Transmission Method for Parallel Radio Transmission of Digital Data Sub-Streams and a Mobile Radio Transmission System
    T. Haustein, C. von Helmolt, V. Jungnickel, U. Krüger, V. Pohl, S. Stanczak
    World patent: WO/2002/075953 (Sept. 26, 2002),   European patent: EP 1374419 (May 25, 2005),   US patent: US 7760814 (July 20, 2010)
  3. Digital Linear Filter-Type Equalizer
    V. Pohl
    World patent: WO/2003/101059 (Dec. 4, 2004),   German patent: 102 23 445 (July 14, 2005)
  4. Method for Reducing Interference in a Radio Communication System
    H. Chen, V. Jungnickel, V. Pohl, T. Weber, W. Zirwas
    World patent: WO/2006/125795 (Nov. 26, 2006),   European patent: EP 1727297 (Nov. 29, 2006),   US patent appl.: US 11/943669 (Nov. 21, 2007)
  5. Diffusor
    R. Hentges, C. von Helmolt, V. Jungnickel, V. Pohl
    German patent: 199 21 091 (May 31, 2001)
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