Title :
Asymptotic SEP Analysis of Two-Way Relaying Networks With Distributed Alamouti Codes
Author :
Feng-Kui Gong ; Jian-Kang Zhang ; Jian-hua Ge
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´an, China
Abstract :
Asymptotic symbol error probability (SEP) performance with an optimal maximum likelihood (ML) receiver and square quadrature amplitude modulation (QAM) constellations is investigated for two-way amplify-and-forward (AF) half-duplex relaying networks employing distributed Alamouti space-time block codes (DASTCs) recently proposed by Duong By developing a novel strategy to particularly deal with some specific Gaussian integrals, two asymptotic SEP formulas are derived for both fixed- and variable-gain AF protocols. These analytic results reveal that, when the signal-to-noise ratio (SNR) is large, the diversity gain for the variable-gain AF is 2, whereas the diversity gain function for the fixed-gain AF is proportional to SNR-2 ln SNR.
Keywords :
Gaussian processes; amplify and forward communication; error statistics; maximum likelihood estimation; protocols; quadrature amplitude modulation; space-time block codes; Gaussian integral; asymptotic symbol error probability analysis; distributed Alamouti codes; distributed Alamouti space-time block codes; diversity gain function; fixed-gain AF protocol; optimal maximum likelihood receiver; signal-to-noise ratio; square quadrature amplitude modulation constellation; two-way amplify-and-forward half-duplex relaying network; two-way relaying network; variable-gain AF protocol; Block codes; Diversity methods; Fading; Quadrature amplitude modulation; Relays; Signal to noise ratio; Vectors; Amplify and forward (AF); distributed Alamouti spacetime block code (DASTC); half-duplex two-way relaying networks; symbol error probability (SEP);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2012.2210060
