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9 results on '"Fouad, Yaser M. M."'

3. Non-Coherent Open-Loop MIMO Communications Over Temporally-Correlated Channels

Author

Universitat Politècnica de València. Instituto Universitario de Telecomunicación y Aplicaciones Multimedia - Institut Universitari de Telecomunicacions i Aplicacions Multimèdia, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, European Commission, Huawei Technologies Canada Co., Ltd., Ontario Ministry of Economic Development and Innovation, Cabrejas Peñuelas, Jorge, Roger Varea, Sandra, Calabuig Soler, Daniel, Fouad, Yaser M. M., Gohary, Ramy H., Monserrat del Río, José Francisco, Yanikomeroglu, Halim, Universitat Politècnica de València. Instituto Universitario de Telecomunicación y Aplicaciones Multimedia - Institut Universitari de Telecomunicacions i Aplicacions Multimèdia, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, European Commission, Huawei Technologies Canada Co., Ltd., Ontario Ministry of Economic Development and Innovation, Cabrejas Peñuelas, Jorge, Roger Varea, Sandra, Calabuig Soler, Daniel, Fouad, Yaser M. M., Gohary, Ramy H., Monserrat del Río, José Francisco, and Yanikomeroglu, Halim

Abstract

[EN] This paper investigates the use of non-coherent communication techniques for open-loop transmission over temporally-correlated Rayleigh-fading MIMO channels. These techniques perform data detection without knowing the instantaneous channel coefficients. Three non-coherent Multiple Input Multiple Output (MIMO) schemes, namely, differential unitary space-time modulation, differential space-time block code, and Grassmannian signaling, are compared with several state-of-the-art training-based coherent schemes. This paper shows that the non-coherent schemes are meaningful alternatives to training-based communication, specially as the number of transmit antennas increases. In particular, for more than two transmit antennas, non-coherent communication provides a clear advantage in medium to high mobility scenarios.

Published
2016

5. Time-frequency Grassmannian signalling for MIMO multi-channel-frequency-flat systems

Author

Universitat Politècnica de València. Instituto Universitario de Telecomunicación y Aplicaciones Multimedia - Institut Universitari de Telecomunicacions i Aplicacions Multimèdia, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Ministerio de Ciencia e Innovación, Natural Sciences and Engineering Research Council of Canada, Huawei Technologies Canada Co., Ltd., Ontario Ministry of Economic Development and Innovation, Fouad, Yaser M. M., Gohary, Ramy H., Cabrejas Peñuelas, Jorge, Yanikomeroglu, Halim, Calabuig Soler, Daniel, Roger Varea, Sandra, Monserrat del Río, José Francisco, Universitat Politècnica de València. Instituto Universitario de Telecomunicación y Aplicaciones Multimedia - Institut Universitari de Telecomunicacions i Aplicacions Multimèdia, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Ministerio de Ciencia e Innovación, Natural Sciences and Engineering Research Council of Canada, Huawei Technologies Canada Co., Ltd., Ontario Ministry of Economic Development and Innovation, Fouad, Yaser M. M., Gohary, Ramy H., Cabrejas Peñuelas, Jorge, Yanikomeroglu, Halim, Calabuig Soler, Daniel, Roger Varea, Sandra, and Monserrat del Río, José Francisco

Abstract

In this paper, we consider the application of non-coherent Grassmannian signalling in practical multi-channel-frequency-flat multiple-input multiple-output (MIMO) wireless communication systems. In these systems, Grassmannian signalling, originally developed for single-channel block-fading systems, is not readily applicable. In particular, in such systems, the channel coefficients are constant across time and frequency, which implies that spectrally-efficient signalling ought to be jointly structured over these domains. To approach this goal, we develop a concatenation technique that yields a spectrally-efficient time-frequency Grassmannian signalling scheme, which enables the channel coherence bandwidth to be regarded as an additional coherence time. This scheme is shown to achieve the high signal-to-noise ratio non-coherent capacity of MIMO channels when the fading coefficients are constant over a time-frequency block. This scheme is also applicable in fast fading systems with coherence bandwidth exceeding that of one subchannel. The proposed scheme is independent of the symbol duration, i.e., the channel use duration, and is thus compatible with the transmit filter designs in current systems.

Published
2015

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