DocumentCode :
1694048
Title :
A space-time block code using orthogonal frequency-shift-keying
Author :
Ho, Paul ; Zhang, Songhua ; Kam, Pooi Yuen
Author_Institution :
Sch. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Volume :
5
fYear :
2005
Firstpage :
2896
Abstract :
We investigate in this paper an Alamouti-type space-time block code (STBC) using orthogonal M-ary frequency-shift-keying (MFSK). The signal is coherently detected using the channel estimates derived from the unmodulated (or implicit pilot) component of the orthogonal signal. An exact bit error probability expression for BFSK and tight union bound for MFSK are derived for the proposed coherent ST-FSK receiver. It is observed that the receiver can maintain close to ideal coherent performance even at very fast fading rates. In comparison with differential STBC, the two approaches yield similar error performance in a static fading environment. However, the error performance of differential STBC deteriorates rapidly as the fade rate increases. In terms of implementation complexity and delay, the proposed coherent ST-FSK receiver is similar to differential STBC, as both approaches employ digital filters of similar lengths. The findings in this paper suggest that despite its larger bandwidth requirement, ST-FSK is a very attractive alternative space-time signaling format.
Keywords :
block codes; channel estimation; error statistics; fading channels; frequency shift keying; space-time codes; Alamouti-type space-time block code; M-ary frequency-shift-keying; MFSK; bit error probability; channel estimation; coherent ST-FSK receiver; coherent detection; digital filters; implicit pilot symbols; orthogonal frequency-shift-keying; very fast fading rates; Block codes; Channel estimation; Decoding; Delay; Digital filters; Error probability; Fading; Frequency shift keying; Signal detection; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
Type :
conf
DOI :
10.1109/ICC.2005.1494908
Filename :
1494908
Link To Document :
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