DocumentCode :
153791
Title :
Zero-Forcing approach for L2-Orthogonal ST-Codes with CPM-OFDM schemes and frequency selective Rayleigh fading channels
Author :
Hisojo, Miguel Angel ; Lebrun, Jerome ; Deneire, Luc
Author_Institution :
I3S Lab., Univ. of Nice Sophia Antipolis, Nice, France
fYear :
2014
fDate :
6-8 Oct. 2014
Firstpage :
563
Lastpage :
568
Abstract :
Orthogonal Space-Time Block Codes (STBC) with Multiple-Input Multiple-Output (MIMO) systems have become a very popular way of adding spatial diversity to transmissions. Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique to further increase the robustness against frequency selective fading at high data rates. Some authors have then proposed to combine both: linear STBC codes with OFDM, however, with a major weakness: high Peak to Average Power Ratio (PAPR). Using instead Continuous Phase Modulation (CPM) to get constant envelope signals to reduce PAPR, CPM-OFDM can take advantage of a favorable trade-off between power and bandwidth efficiency given by CPM with the well-known robustness to frequency selective fading of OFDM. To further increase the data throughput, while maintaining robustness to frequency selective fading and low PAPR, we introduce here a new space-time-frequency diversity technique based on MIMO OFDM using L2-orthogonal multi-h CPMSTBC codes. We benchmark these schemes under Rayleigh frequency selective channels with semi-coherent detection and show how they achieve improved spectral compactness while providing a low decoding complexity by the use of a simplified Zero-Forcing (ZF) detection/correlation algorithm.
Keywords :
MIMO communication; OFDM modulation; Rayleigh channels; continuous phase modulation; correlation methods; decoding; diversity reception; signal detection; space-time block codes; CPM-OFDM; L2-orthogonal multi-h CPMSTBC codes; MIMO OFDM; MIMO systems; PAPR; Rayleigh frequency selective channels; constant envelope signals; continuous phase modulation; frequency selective fading; linear STBC codes; multiple-input multiple-output systems; orthogonal frequency division multiplexing; orthogonal space-time block codes; peak to average power ratio; semicoherent detection; space-time-frequency diversity technique; spatial diversity; zero-forcing detection-correlation algorithm; Decoding; Fading; MIMO; Modulation; Peak to average power ratio; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Military Communications Conference (MILCOM), 2014 IEEE
Conference_Location :
Baltimore, MD
Type :
conf
DOI :
10.1109/MILCOM.2014.100
Filename :
6956821
Link To Document :
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