Shaiek

Hmaied Shaiek

Professeur Cnam
Team: Traitement du signal et architectures électroniques
Personal website:
Phone: 0140272499
Office: 11-B2-35

Eng. degree from École Nationale d’Ingénieurs de Tunis in 2002, M.S. degree from Université de Bretagne Occidentale in 2003, Ph.D. degree from Telecom Bretagne-Brest, in 2007 and HDR. degree from CNAM, in 2022. He was with Canon Inc., until 2009 and joined CNAM in 2011, as Associate Professor in electronics and signal processing. In 2023, he was awarded a Chair Professor position in telecommunications systems at CNAM. He has co-authored three patents, 19 journal papers, 1 book chapter, and 48 conference papers. His teaching activities are in the fields of electronics, signal processing and digital communications. His research activities focus on the physical layer of 5G/6G wireless communication systems.

2024

Articles de revue

  1. Darghouthi, A.; Khlifi, A.; Shaiek, H.; Salah, F. B. and Chibani, B. An Hybrid Framework OTFS-OFDM Based on Mobile Speed Estimation. In International Journal of Computer Networks & Communications, 16 (3): 49-67, 2024. doi  www 

Articles de conférence

  1. Guan, H.; Al Hajj, M.; Guillet, V. and Shaiek, H. Enhanced Beam Widening Approach for RIS-Assisted Wireless Communication Systems. In 4th URSI Atlantic RadioScience Conference (AT-RASC 2024), pages Mo-C06-AM3-2, URSI -- International Union of Radio Science, Meloneras (Gran Canaria), Spain, 2024. doi  www 

Rapports

  1. Beldi, C.; Le Ruyet, D.; Shaiek, H.; Zayani, R. and Doré, J-B. ANR POSEIDON Deliverable D3.2 - Cell-free MIMO: Channel estimation, acquisition and MU precoding and detection - preliminary version. Technical Report, CEDRIC Lab/CNAM ; CEA LETI, 2024.

2023

Articles de revue

  1. Farhati, C.; Feki, S.; Shaiek, H.; Dziri, A.; Bey, A. A. El and Abdelkefi, F. Deep-Learning for generic blind-Joint Channel Equalization and Power Amplifier Post-distortion. In IEEE Access, 11: 104754-104762, 2023. doi  www 

Articles de conférence

  1. Bulusu, S.; Susarla, P.; Shaiek, H.; Roviras, D. and Silvén, O. Fast Convergence Joint Optimization of PAPR Reduction and Digital Predistortion in the Next-Generation Broadcasting Systems. In 2023 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), pages 1-6, IEEE, Beijing, China, 2023. doi  www 
  1. Tahkoubit, K.; Shaiek, H.; Alexandre, C.; Faci, S. and Roviras, D. Power budget analysis including PAPR reduction techniques and power amplifier consumption for DVB-T2 and ATSC 3.0. In 2023 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), pages 1-6, IEEE, Beijing, China, 2023. doi  www 
  1. Tahkoubit, K.; Shaiek, H.; Alexandre, C.; Faci, S. and Roviras, D. IDP as an alternative method to reduce the PAPR of DVB-T2 and ATSC 3.0 broadcast systems. In 2023 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), pages 1-6, IEEE, Beijing, China, 2023. doi  www 
  1. Naamani, M.; Le Ruyet, D. and Shaiek, H. A Three-Stage Channel Estimation Approach for RIS-Aided Millimeter-wave MIMO Systems. In 2023 IEEE Wireless Communications and Networking Conference (WCNC), pages 1-6, IEEE, Glasgow, United Kingdom, 2023. doi  www 
  1. Al Hajj, M.; Tahkoubit, K.; Shaiek, H.; Guillet, V. and Le Ruyet, D. On Beam Widening for RIS-Assisted Communications Using Genetic Algorithms. In 2023 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit), pages 24-29, IEEE, Gothenburg, Sweden, 2023. doi  www 

Rapports

  1. Doré, J-B.; Demmer, D.; Zayani, R.; Asma, M.; Le Ruyet, D.; Shaiek, H.; Chevalier, P.; Nafkha, A.; Farès, H.; Corre, Y. and Jaziri, A. ANR-POSEIDON Deliverable D1.1: Scenario description KPIs and PHY requirements. Technical Report D1.1, CEA LETI ; CNAM, 292 rue Saint-Martin, 75003 Paris ; IETR ; SIRADEL, 2023.

2022

Thèses et habilitations

  1. Shaiek, H. Multi-carrier waveforms for 5G and beyond systems: from power amplifier impairments to energy efficiency enhancement. Ph.D. Thesis, CNAM Paris, 2022.

2021

Articles de revue

  1. Bulusu, S. S. K. C.; Shaiek, H. and Roviras, D. HPA Linearization for Next Generation Broadcasting Systems With Fast Convergence-Digital Predistortion. In IEEE Transactions on Broadcasting, 67 (3): 776-790, 2021. doi  www 
  1. Tahkoubit, K.; Shaiek, H.; Roviras, D.; Faci, S. and Ali-Pacha, A. Generalized Iterative Dichotomy PAPR Reduction Method for Multicarrier Waveforms. In IEEE Access, 9: 114235-114245, 2021. doi  www 

Articles de conférence

  1. Tahkoubit, K.; Shaiek, H.; Alexandre, C.; Faci, S.; Roviras, D. and Ali-Pacha, A. Hardware Implementation of IDP and LINC Methods Using Real Power Amplifiers. In 2021 International Conference on Software, Telecommunications and Computer Networks (SoftCOM), pages 1-5, IEEE, Split, France, 2021. doi  www 
  1. Shaiek, H.; Ramdani, K. and Roviras, D. Modified Autoencoder Structure for Reducing BER Performance. In 2021 International Conference on Software, Telecommunications and Computer Networks (SoftCOM), pages 1-5, IEEE, Split, France, 2021. doi  www 

2020

Articles de revue

  1. Cheng, X.; Zayani, R.; Shaiek, H. and Roviras, D. Analysis and Cancellation of Mixed-Numerologies Interference for Massive MIMO-OFDM UL. In IEEE Wireless Communications Letters, 9 (4): 470-474, 2020. doi  www 
  1. Fhima, H.; Zayani, R.; Shaiek, H.; Roviras, D.; Chang, B. S. and Bouallegue, R. Comparison of Linear, Widely Linear and Fresh Equalizers for FBMC-OQAM Systems with Different Numerologies. In Wireless Personal Communications, 2020. doi  www 

Articles de conférence

  1. Tahkoubit, K.; Shaiek, H.; Roviras, D. and Ali-Pacha, A. Energy efficiency comparison of Outphasing and IDP techniques with non-linear power amplifiers. In 2020 3rd International Conference on Advanced Communication Technologies and Networking (CommNet), pages 1-5, IEEE, Marrakech, France, 2020. doi  www 
  1. Benosman, M.; Shaiek, H.; Bendimerad, Y.; Zayani, R.; Roviras, D. and Bendimrad, F. T. Low Complexity Neural Network Based Digital Predistortion for Memory Power Amplifier. In The 6th International Conference on Mobile, Secure and Programmable Networking, Springer, Paris, France, Lecture Notes in Computer Science, vol 12605 , 2020. doi  www 

2019

Articles de revue

  1. Zayani, R.; Shaiek, H. and Roviras, D. Ping-Pong Joint Optimization of PAPR Reduction and HPA Linearization in OFDM Systems. In IEEE Transactions on Broadcasting, 65 (2): 308-315, 2019. doi  www 
  1. Zayani, R.; Shaiek, H. and Roviras, D. Efficient Precoding for Massive MIMO Downlink Under PA Nonlinearities. In IEEE Communications Letters, 23 (9): 1611-1615, 2019. doi  www 
  1. Zayani, R.; Shaiek, H. and Roviras, D. PAPR-Aware Massive MIMO-OFDM Downlink. In IEEE Access, 7: 25474-25484, 2019. doi  www 
  1. Cheng, X.; Zayani, R.; Shaiek, H. and Roviras, D. Inter-Numerology Interference Analysis and Cancellation for Massive MIMO-OFDM Downlink Systems. In IEEE Access, 7: 177164-177176, 2019. doi  www 
  1. Tahkoubit, K.; Ali-Pacha, A.; Shaiek, H. and Roviras, D. Iterative Dichotomy PAPR Reduction Method for Multicarrier Waveforms. In IEEE Communications Letters, 23 (11): 2073-2076, 2019. doi  www 
  1. Shaiek, H.; Zayani, R.; Medjahdi, Y. and Roviras, D. Analytical Analysis of SER for Beyond 5G Post-OFDM Waveforms in Presence of High Power Amplifiers. In IEEE Access, 7: 29441-29452, 2019. doi  www 

Articles de conférence

  1. Tahkoubit, K.; Ali-Pacha, A.; Shaiek, H. and Roviras, D. PAPR reduction of BF-OFDM waveform using DFT-Spread technique. In 2019 16th International Symposium on Wireless Communication Systems (ISWCS), pages 406-410, IEEE, Oulu, France, 2019. doi  www 
  1. Bulusu, S. S. K. C.; Maddila, S. S. P.; Shaiek, H. and Roviras, D. HPA Linearization for FBMC-OQAM Signals with Fast Convergence-Digital Predistortion. In 2019 16th International Symposium on Wireless Communication Systems (ISWCS), pages 133-138, IEEE, Oulu, France, 2019. doi  www 

Divers

  1. Traverso, S.; Zayani, R.; Shaiek, H.; Alexandre, C.; Roviras, D. and Doré, J-B. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5). , Document Number D5.2 - ANR-15-CE25-0005, WONG5. www 

Rapports

  1. Zayani, R.; Traverso, S.; Shaiek, H.; Alexandre, C.; Roviras, D. and Doré, J-B. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5) Document Number D5.3 Experimental testbed of post-OFDM Waveforms. Technical Report, Cnam Paris, 2019.

2018

Articles de revue

  1. Zayani, R.; Shaiek, H.; Cheng, X.; Fu, X.; Alexandre, C. and Roviras, D. Experimental Testbed of Post-OFDM Waveforms Toward Future Wireless Networks. In IEEE Access, 6: 67665-67680, 2018. doi  www 

Articles de conférence

  1. Lou"et, Y.; Roviras, D.; Nafkha, A.; Shaiek, H. and Zayani, R. Global power amplifier efficiency evaluation withPAPR reduction method for post-OFDM waveforms. In International Symposium on Wireless Communication System (ISWCS 2018), Lisbonne, Portugal, 2018. doi  www 
  1. Tani, K.; Medjahdi, Y.; Shaiek, H.; Zayani, R. and Roviras, D. PAPR reduction of post-OFDM waveforms contenders for 5G & Beyond using SLM and TR algorithms. In 2018 25th International Conference on Telecommunications (ICT), pages 104-109, IEEE, St. Malo, France, 2018. doi  www 
  1. Zayani, R.; Shaiek, H.; Alexandre, C.; Kielys, A.; Cheng, X.; Fu, X. and Roviras, D. A Testbed for Experimental Performance Evaluation of Multicarrier Waveforms in Presence of RF PA. In 2018 15th International Symposium on Wireless Communication Systems (ISWCS), pages 1-6, IEEE, Lisbon, Portugal, 2018. doi  www 
  1. Medjahdi, Y.; Lou"et, Y.; Roviras, D.; Traverso, S.; Gerzaguet, R.; Shaiek, H.; Zayani, R.; Demmer, D.; Zakaria, R.; Doré, J-B.; Ben Mabrouk, M. and Le Ruyet, D. Impact of selective channels on post-OFDMwaveforms for 5G Machine Type Communications. In International Symposium on Wireless Communication System (ISWCS 2018), Lisbonne, Portugal, 2018. doi  www 
  1. Fhima, H.; Shaiek, H.; Zayani, R.; Roviras, D.; Chang, B. S. and Bouallegue, R. Analysis of Widely Linear Equalization over Frequency Selective Channels with Multiple Interferences. In 2018 14th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), pages 83-88, IEEE, Limassol, France, 2018. doi  www 
  1. Fhima, H.; Chang, B. S.; Zayani, R.; Shaiek, H.; Roviras, D. and Bouallegue, R. Performance of Linear and Widely Linear Equalizers for FBMC/OQAM modulation. In 2018 25th International Conference on Telecommunications (ICT), pages 605-609, IEEE, St. Malo, France, 2018. doi  www 
  1. Medjahdi, Y.; Shaiek, H.; Roviras, D.; Lou"et, Y. and Ben Mabrouk, M. Non linear power amplifier effects on post-OFDM waveforms. In URSI AT RASC Conference, Gran Canaria, Spain, 2018. www 

Rapports

  1. Lou"et, Y.; Nafkha, A.; Shaiek, H.; Roviras, D. and Zayani, R. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5) Document Number D3.3 Overall power budget. Technical Report, CentraleSupélec ; Conservatoire national des arts et métiers - CNAM, 2018.

2017

Articles de revue

  1. Zayani, R.; Shaiek, H.; Roviras, D. and Medjahdi, Y. BER analysis of filter-bank multicarrier with offset quadrature amplitude modulation systems with phase estimation error. In IET Communications, 11 (15): 2269-2273, 2017. doi  www 
  1. Bulusu, S. S. C.; Renfors, M.; Yli-Kaakinen, J.; Shaiek, H. and Roviras, D. Enhanced multicarrier techniques for narrowband and broadband PMR coexistence. In Transactions on emerging telecommunications technologies, 28 (3): e3056, 2017. doi  www 
  1. Medjahdi, Y.; Traverso, S.; Gerzaguet, R.; Shaiek, H.; Zayani, R.; Demmer, D.; Zakaria, R.; Doré, J-B.; Ben Mabrouk, M.; Le Ruyet, D.; Lou"et, Y. and Roviras, D. On the Road to 5G: Comparative Study of Physical Layer in MTC Context. In IEEE Access, 5: 26556-26581, 2017. doi  www 

Chapitres d'ouvrage

  1. Shaiek, H.; Bulusu, K. C.; Roviras, D.; Zayani, R.; Renfors, M.; Anttila, L. and Abdelaziz, M. Power Amplifier Effects and Peak-to-Average Power Mitigation. In Orthogonal Waveforms and Filter Banks for Future Communications Systems, pages 461-489, Elsevier, 2017. doi  www 

Articles de conférence

  1. Gerzaguet, R.; Medjahdi, Y.; Demmer, D.; Zayani, R.; Doré, J-B.; Shaiek, H. and Roviras, D. Comparison of promising candidate waveforms for 5G: WOLA-OFDM versus BF-OFDM. In 2017 International Symposium on Wireless Communication Systems (ISWCS), pages 355-359, IEEE, Bologna, France, 2017. doi  www 
  1. Chang, B.; da Rocha, C.; Fhima, H.; Zayani, R.; Shaiek, H. and Roviras, D. On the performance of a widely linear SC-FDE system under multiple independent interferences. In 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), pages 1-5, IEEE, Montreal, France, 2017. doi  www 
  1. Fhima, H.; Zayani, R.; Shaiek, H.; Roviras, D.; Chang, B. S. and Bouallegue, R. Widely linear equalizer performance with multiple independent interferences. In 2017 IEEE Symposium on Computers and Communications (ISCC), pages 912-917, IEEE, Heraklion, France, 2017. doi  www 
  1. Medjahdi, Y.; Zayani, R.; Shaiek, H. and Roviras, D. WOLA processing: A useful tool for windowed waveforms in 5G with relaxed synchronicity. In 2017 IEEE International Conference on Communications Workshops (ICC Workshops), pages 393-398, IEEE, Paris, France, 2017. doi  www 

Rapports

  1. Medjahdi, Y.; Traverso, S.; Doré, J-B.; Shaiek, H.; Roviras, D.; Gerzaguet, R.; Zayani, R.; Demmer, D.; Chevalier, P.; Lou"et, Y.; Ben Mabrouk, M.; Zakaria, R. and Le Ruyet, D. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5) Document Number D2.1 Critical and comparative study of waveforms in C-MTC context. Technical Report, CEDRIC Lab/CNAM, 2017.
  1. Lou"et, Y.; Shaiek, H.; Roviras, D.; Medjahdi, Y.; Zayani, R. and Ben Mabrouk, M. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5) Document Number D3.2 New methods to enhance the energy efficiency. Technical Report, CentraleSupélec ; Conservatoire national des arts et métiers - CNAM, 2017.
  1. Shaiek, H.; Roviras, D.; Medjahdi, Y.; Zayani, R.; Ben Mabrouk, M. and Lou"et, Y. Waveforms MOdels for Machine Type CommuNication inteGrating 5G Networks (WONG5) Document Number D3.1. Technical Report, Conservatoire national des arts et métiers - CNAM, 2017.

2016

Articles de revue

  1. Bulusu, S.S. K. C.; Shaiek, H. and Roviras, D. Reducing the PAPR in FBMC-OQAM systems with low-latency trellis-based SLM technique. In EURASIP Journal on Advances in Signal Processing, 2016 (1), 2016. doi  www 

Brevets

  1. Shaiek, H.; Roviras, D. and Zayani, R. Procédé de mise en forme d'un signal en vue de son amplification, procédé d'amplification, dispositif de mise en forme, et dispositif d'amplification associés. www 

Articles de conférence

  1. Bulusu, K. C.; Shaiek, H. and Roviras, D. Impact of HPA Non-Linearity on Coexistence of FBMC-OQAM Systems with PMR/PPDR Systems. In 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), pages 1-5, IEEE, Nanjing, France, 2016. doi  www 
  1. Bulusu, S. S. K. C.; Shaiek, H. and Roviras, D. PA linearization of FBMC-OQAM signals with overlapped recursive error correcting predistortion. In 2016 International Symposium on Wireless Communication Systems (ISWCS), pages 533-537, IEEE, Poznan, France, 2016. doi  www 
  1. Zayani, R.; Medjahdi, Y.; Shaiek, H. and Roviras, D. WOLA-OFDM: A Potential Candidate for Asynchronous 5G. In 2016 IEEE Globecom Workshops (GC Wkshps), pages 1-5, IEEE, Washington, France, 2016. doi  www 

2015

Articles de revue

  1. Zayani, R.; Shaiek, H.; Roviras, D. and Medjahdi, Y. Closed-Form BER Expression for (QAM or OQAM)-Based OFDM System With HPA Nonlinearity Over Rayleigh Fading Channel. In IEEE Wireless Communications Letters, 4 (1): 38-41, 2015. doi  www 

Articles de conférence

  1. Bulusu, S. S. K. C.; Shaiek, H. and Roviras, D. Reduction of PAPR of FBMC-OQAM systems by dispersive tone reservation technique. In 2015 International Symposium on Wireless Communication Systems, pages 561-565, IEEE, Brussels, France, 2015. doi  www 
  1. Bouhadda, H.; Zayani, R.; Shaiek, H.; Roviras, D. and Bouallegue, R. Iterative receiver cancellation of nonlinear power amplifier distortion in FBMC/OQAM system. In 2015 IEEE 11th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), pages 691-695, IEEE, Abu Dhabi, France, 2015. doi  www 
  1. Bouhadda, H.; Zayani, R.; Shaiek, H.; Roviras, D. and Bouallegue, R. Receiver Technique for Detection and Correction of Nonlinear High Power Amplifier Distortion Errors in OFDM systems. In IEEE 81st Vehicular Technology Conference, IEEE, Glasgow, United Kingdom, 2015. doi  www 
  1. Bulusu, S. S. K. C.; Shaiek, H. and Roviras, D. Potency of Trellis-based SLM over symbol-by-symbol approach in reducing PAPR for FBMC-OQAM Signals. In ICC, pages 1-6, London, United Kingdom, 2015. doi  www 

2014

Articles de revue

  1. Bouhadda, H.; Shaiek, H.; Roviras, D.; Zayani, R.; Medjahdi, Y. and Bouallegue, R. Theoretical analysis of BER performance of non-linearly ampli?ed FBMC/OQAM and OFDM signals. In EURASIP Journal on Advances in Signal Processing, 2014 (1): 1-16, 2014. doi  www 
  1. Zayani, R.; Shaiek, H.; Roviras, D. and Medjahdi, Y. Closed-form BER expression for (QAM or OQAM) based OFDM system with HPA nonlinearity over Rayleigh fading channel. In IEEE Wireless Communications Letters: 00, 2014. www 

Articles de conférence

  1. Bulusu, S. S. K. C.; Shaiek, H.; Roviras, D. and Zayani, R. PAPR Reduction for FBMC-OQAM Systems using Dispersive SLM Technique. In IEEE International Symposium on Wireless Communication Systems, pages 1-5, Barcelona, Spain, 2014. www 
  1. Zayani, R.; Medjahdi, Y.; Bouhadda, H.; Shaiek, H.; Roviras, D. and Bouallegue, R. Adaptive Predistortion techniques for non-linearly ampli?ed FBMC-OQAM signals. In VTC 2014, pages 1-5, X, South Korea, 2014. www 
  1. Bouhadda, H.; Shaiek, H.; Medjahdi, Y.; Roviras, D.; Zayani, R. and Bouallegue, R. Sensitivity analysis of FBMC signals to non linear phase distortion. In 2014 ICC - 2014 IEEE International Conference on Communication Workshop (ICC), pages 73-78, IEEE, Sydney, Australia, 2014. doi  www 
  1. Bulusu, S. S. K. C.; Shaiek, H. and Roviras, D. Prediction of Spectral Regrowth for FBMC-OQAM system using Cumulants. In IEEE International Workshop on Selected Topics in Wireless and Mobile computing, pages 1-5, Larnaca, Cyprus, 2014. www 

Rapports

  1. Shaiek, H.; Roviras, D.; Bulusu, S.S. K. C.; Renfors, M.; Martinod, L.; Narandzic, M.; Marijanovic, L. and Tomic, S. Enhanced Multicarrier Techniques for Professional Ad-Hoc and Cell-Based Communications (EMPhAtiC) Document Number D3.3 Reduction of PAPR and non linearities effects. Technical Report, European Commission Information Commission Technology, 2014.

2013

Articles de conférence

  1. Shaiek, H.; Sall, S.; Roviras, D. and Medjahdi, Y. Analysis of the nonlinear spectral re-growth in FBMC systems for cognitive radio context. In International Symposium on Wireless Communications, ISWCS 2013, pages 1-5, Ilmenau, Germany, 2013. www 

2012

Brevets

  1. Shaiek, H.; Diquélou, P-Y. and Kerneis, D. Method for developing correction filters for correcting the acoustic modes of a room. www 

Articles de conférence

  1. Medjahdi, Y.; Le Ruyet, D.; Roviras, D.; Shaiek, H. and Zakaria, R. On the Impact of the Prototype Filter on FBMC Sensitivity to Time Asynchronism. In International Symposium on Wireless Communication Systems (ISWCS 2012), pages 1-5, Paris, France, 2012. www 

2010

Articles de revue

  1. Shaiek, H. and Boucher, J-M. Optimizing the directivity of multiway loudspeaker systems. In EURASIP Journal on Audio, Speech, and Music Processing, 2010 (928439), 2010. doi  www 

2009

Articles de conférence

  1. Lakhdhar, K.; Jaidane, M.; Shaiek, H. and Boucher, J. Iterative equalization of room transfer function using biquadratic filters. In 2009 IEEE Intrumentation and Measurement Technology Conference (I2MTC), pages 1463-1466, IEEE, Singapore. Singapore, France, 2009. doi  www 

2007

Articles de conférence

  1. Ndo, G.; Shaiek, H.; Jaidane, M. and Boucher, J. An hybrid approach of low frequency room equalization: Notch filters based on common acoustical pole modeling. In EUSIPCO. 2007 15th European Signal Processing Conference, IEEE, Poznan, Poland, 2007. www 

Thèses et habilitations

  1. Shaiek, H. Optimisation des performances dénceintes co-axiales par traitement numérique du signal. Ph.D. Thesis, Université de Bretagne occidentale, 2007.

2006

Brevets

  1. Shaiek, H.; Debail, B. and Boucher, J-M. Activation signal filtering device for e.g. professional listening system, has digital filtering unit with channel separation unit under constraint, where separation unit has separator filters covering frequency band between channels. www 
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