Complex Orthogonal Space-Time Processing in Wireless Communications
Complex Orthogonal Space-Time Processing in Wireless Communications
Space-time block codes from orthogonal designs
IEEE Transactions on Information Theory
Square-matrix embeddable space-time block codes for complex signal constellations
IEEE Transactions on Information Theory
Orthogonal designs with maximal rates
IEEE Transactions on Information Theory
Single-symbol maximum likelihood decodable linear STBCs
IEEE Transactions on Information Theory
Low PAPR square STBCs from complex partial-orthogonal designs (CPODs)
IEEE Transactions on Wireless Communications
A novel construction of complex orthogonal designs with maximal rate and low-PAPR
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 1
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Space-Time Block Codes from square complex orthogonal designs (SCOD) have been extensively studied and most of the existing SCODs contain large number of zero. The zeros in the designs result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation of the code when turning off some of the transmitting antennas whenever a zero is transmitted. Recently, rate 1/2 SCODs with no zero entry have been reported for 8 transmit antennas. In this paper, SCODs with no zero entry for 2a transmit antennas whenever a + 1 is a power of 2, are constructed which includes the 8 transmit antennas case as a special case. More generally, for arbitrary values of a, explicit construction of 2a × 2a rate a+1/2a SCODs with the ratio of number of zero entries to the total number of entries equal to 1 - a+1/2a 2⌊log2(2a/a+1)⌋ is reported, whereas for standard known constructions, the ratio is 1- a+1/2a. The codes presented do not result in increased signaling complexity. Simulation results show that the codes constructed in this paper outperform the codes using the standard construction under peak power constraint while performing the same under average power constraint.