Square complex orthogonal designs with low PAPR and signaling complexity

Das, Smarajit ; Sundar Rajan, B. (2009) Square complex orthogonal designs with low PAPR and signaling complexity IEEE Transactions on Wireless Communications, 8 (1). pp. 204-213. ISSN 1536-1276

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Official URL: http://ieeexplore.ieee.org/document/4786501/

Related URL: http://dx.doi.org/10.1109/T-WC.2009.070771

Abstract

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 times 2a rate a+1/2a SCODs with the ratio of number of zero entries to the total number of entries equal to 1 - aplusmn1/2a 2[logs22 a /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.

Item Type:Article
Source:Copyright of this article belongs to Institute of Electrical and Electronics Engineers.
Keywords:Transmit Diversity; Amicable Orthogonal Designs; MIMO; Orthogonal Designs; PAPR; Space-Time Codes
ID Code:108000
Deposited On:08 Dec 2017 10:13
Last Modified:08 Dec 2017 10:13

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