Title :
Space–Frequency Codes Based on Geometric Design
Author :
Li, Qian ; Li, Kwok H. ; Teh, Kah C.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
fDate :
3/1/2009 12:00:00 AM
Abstract :
A new method is proposed to construct space-frequency (SF) codes for multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems undergoing frequency-selective fading. The new design exploits the geometric relationship of coherent and noncoherent SF codes, and each codeword is constructed as a product of a noncoherent SF codeword and an information-bearing square matrix. A two-stage decoding strategy, where noncoherent detection and coherent detection are implemented sequentially, is proposed to reduce decoding complexity.
Keywords :
MIMO communication; OFDM modulation; channel coding; decoding; fading channels; geometric codes; matrix algebra; space-time codes; channel coding; decoding strategy; frequency-selective fading channel; geometric design; information-bearing square matrix; multiple-input-multiple-output system; noncoherent space-frequency codeword; orthogonal frequency-division multiplexing; space-frequency code; MIMO; Multiple input–multiple output (MIMO); OFDM; orthogonal frequency-division multiplexing (OFDM); space–frequency codes; space-frequency codes;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2008.926202
