Title :
Sphere Decoding Based Multiple Symbol Detection for Differential Space-Time Block Coded Ultra-Wideband Systems
Author :
Wang, Taotao ; Lv, Tiejun ; Gao, Hui
Author_Institution :
Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China
fDate :
3/1/2011 12:00:00 AM
Abstract :
In this letter, a sphere decoding (SD) based noncoherent multiple symbol detection (MSD) scheme is proposed for differential space-time block coded (DSTBC) ultra-wideband (UWB) impulse radio systems. Exhaustive search based maximum likelihood (ML) MSD is impractical in DSTBC-UWB systems since its complexity exponentially increases with observation window size. To decrease the computational complexity, the original MSD metric is transformed into another equivalent form which can be implemented by SD for DSTBC-UWB systems.
Keywords :
decoding; space-time block codes; ultra wideband communication; differential space time block coded ultrawideband system; maximum likelihood MSD; noncoherent multiple symbol detection scheme; sphere decoding; ultrawideband impulse radio system; Computational complexity; Decoding; Measurement; Receiving antennas; Transmitting antennas; DSTBC; UWB; multiple symbol detection; noncoherent; sphere decoding;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.011011.101877
