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Sphere Decoding Based Multiple Symbol Detection for Differential Space-Time Block Coded Ultra-Wideband Systems

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3 Author(s)
Taotao Wang ; School of Information and Communication Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing, China ; Tiejun Lv ; Hui Gao

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.

Published in:

IEEE Communications Letters  (Volume:15 ,  Issue: 3 )