DocumentCode :
2031091
Title :
Complex Near-Orthogonal Designs with No Zero Entry
Author :
Muni Kumar, G.V.R. ; Sundar Raj, B.
Author_Institution :
Indian Inst. of Sci., Bangalore
fYear :
2007
fDate :
24-29 June 2007
Firstpage :
2636
Lastpage :
2640
Abstract :
Zero entries in complex orthogonal designs (CODs) impede their practical implementation. In this paper, a method of obtaining a no zero entry (NZE) code for 2k+1 antennas whenever a NZE code exists for 2k antennas is presented. This is achieved with slight increase in the ML decoding complexity for regular QAM constellations and no increase for other complex constellations. Since NZE CODs have been constructed recently for 8 antennas our method leads to NZE codes for 16 antennas. Simulation results show good performance of our new codes compared to the well known constructions for 16 and 32 antennas under peak power constraints.
Keywords :
antenna arrays; computational complexity; maximum likelihood decoding; orthogonal codes; quadrature amplitude modulation; ML decoding complexity; QAM; antenna array; complex near-orthogonal design; no zero entry code; Constellation diagram; Decoding; Delay; Impedance; Peak to average power ratio; Quadrature amplitude modulation; Signal design; Transmitting antennas; Zirconium;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Theory, 2007. ISIT 2007. IEEE International Symposium on
Conference_Location :
Nice
Print_ISBN :
978-1-4244-1397-3
Type :
conf
DOI :
10.1109/ISIT.2007.4557616
Filename :
4557616
Link To Document :
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