DocumentCode :
2326210
Title :
CTH10-4: High-rate, Double-Symbol-Decodable STBCs from Clifford Algebras
Author :
Karmakar, Sanjay ; Rajan, B. Sundar
Author_Institution :
Dept. of ECE, Indian Inst. Of Sci. Bangalore, Bangalore
fYear :
2006
fDate :
Nov. 27 2006-Dec. 1 2006
Firstpage :
1
Lastpage :
5
Abstract :
For the number of transmit antennas N = 2a the maximum rate (in complex symbols per channel use) of all the Quasi-Orthogonal Designs (QODs) reported in the literature is a/2 a-1. In this paper, we report double-symbol-decodable Space- Time Block Codes with rate a-1/2 a-2 for N = 2a transmit antennas. In particular, our code for 8 and 16 transmit antennas offer rates 1 and 3/4 respectively, the known QODs offer only 3/4 and 1/2 respectively. Our construction is based on the representations of Clifford algebras and applicable for any number of transmit antennas. We study the diversity sum and diversity product of our codes. We show that our diversity sum is larger than that of all known QODs and hence our codes perform better than the comparable QODs at low SNRs for identical spectral efficiency. We provide simulation results for various spectral efficiencies.
Keywords :
algebra; block codes; cyclic codes; orthogonal codes; space-time codes; transmitting antennas; Clifford algebras; complex symbols per channel use; diversity sum and diversity product; double-symbol-decodable STBC; identical spectral efficiency; quasi-orthogonal designs; space-time block codes; transmit antennas; Algebra; Block codes; Channel state information; Constellation diagram; Matrix decomposition; Maximum likelihood decoding; Sufficient conditions; Tin; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE
Conference_Location :
San Francisco, CA
ISSN :
1930-529X
Print_ISBN :
1-4244-0356-1
Electronic_ISBN :
1930-529X
Type :
conf
DOI :
10.1109/GLOCOM.2006.90
Filename :
4150720
Link To Document :
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