Title :
Soft-Output Detection Based on Multi-hop-return Sphere Searching for Distributed Space-Frequency Coded Cooperative Communication System
Author :
Yu Xiao-fan ; Hu An-bing ; Ji Jin-zhang ; Yang Lu-lu ; Xin Bo ; Dong Ying
Author_Institution :
Post-Doctoral Res. Station of Southeast Univ., Nanjing, China
Abstract :
This paper proposes a soft-output detection algorithm based on multi-hop-return sphere searching for distributed space-frequency coded cooperative communication system over frequency-selective fading channels. The algorithm finds out the vector point of the sphere center through the sphere decoding quickly at first, and then returns to collecting soft decoding information layer by layer. Theoretical analysis and simulation results show the proposed algorithm not only reduces the complexity of symbol detection, but also improves the accuracy of the channel decoding of the distributed space-frequency coded cooperative communication systems by effectively exacting the bit-level soft information from the received signal using Low Density Parity Check Codes (LDPC).
Keywords :
channel coding; cooperative communication; decoding; fading channels; parity check codes; vectors; LDPC codes; bit-level soft information; channel decoding; distributed space-frequency coded cooperative communication system; frequency-selective fading channels; low density parity check codes; multihop-return sphere searching; soft decoding information; soft-output detection algorithm; sphere center; sphere decoding; symbol detection; vector point; Communication systems; Decoding; Detection algorithms; Encoding; Parity check codes; Relays; Vectors; Cooperative Communication; Distributed Space Frequency Coding; Multi Hop Return; Soft Output; Sphere Decoding; Symbol Detection;
Conference_Titel :
Military Communications Conference, MILCOM 2013 - 2013 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/MILCOM.2013.13