DocumentCode :
3441082
Title :
Sphere Detection in MIMO Communication Systems with Imperfect Channel State Information
Author :
Farhoodi, Ahmad Ali ; Fazaelifar, Mohammad
Author_Institution :
Eng. Sch., Shiraz Univ., Shiraz
fYear :
2008
fDate :
5-8 May 2008
Firstpage :
228
Lastpage :
233
Abstract :
Capacity of wireless communication systems can be increased enormously using arrays of antenna at transmitter and receiver. In these so called multi-input multi-output (MIMO) communication systems, the performance of symbol detection methods is tightly related to the channel knowledge at the receiver side. Practically, the channel information at the receiver is subjected to error because of the outdated data, quantization error, and imperfect channel estimation/measurement. It is known that in the case of imperfect channel knowledge, performance of symbol detection in MIMO communication systems may severely degrades. In this paper, we briefly address the effect of channel estimation error on the performance of sphere detector in MIMO communication systems. We analytically propose and study two detection methods to improve the performance of sphere detector when the channel matrix is imperfectly known at receiver. In our proposed robust method, the sphere detection algorithm is modified while a small computational complexity is added to the detector.
Keywords :
MIMO communication; antenna arrays; channel capacity; channel estimation; matrix algebra; radio receivers; signal detection; MIMO communication systems; antenna arrays; channel estimation error; channel matrix; channel state information; computational complexity; multiinput multioutput communication; quantization error; radio receiver; sphere detection algorithm; symbol detection method; wireless communication system capacity; Antenna arrays; Channel estimation; Channel state information; Detectors; MIMO; Quantization; Receiving antennas; Transmitters; Transmitting antennas; Wireless communication; Channel Estimation Error; MIMO Communication Systems; Sphere Detector;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communication Networks and Services Research Conference, 2008. CNSR 2008. 6th Annual
Conference_Location :
Halifax, NS
Print_ISBN :
978-0-7695-3135-9
Type :
conf
DOI :
10.1109/CNSR.2008.50
Filename :
4519863
Link To Document :
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