Title :
Optimal Relay Precoding for Two-Hop AF Transmission and Performance Analysis over Rayleigh-Fading Channels
Author :
Fu, Youhua ; Yang, Luxi ; Zhu, Wei-Ping ; Liu, Chen
Author_Institution :
Key Lab. of Broadband Wireless Commun. & Sensor Network Technol., Nanjing Univ. of Posts & Telecommun., Nanjing, China
fDate :
11/1/2011 12:00:00 AM
Abstract :
In this paper, we first derive an optimal precoder for amplify-and-forward (AF) multiple-antenna relay systems with single-antenna source and destination terminals by maximizing the output signal-to-noise ratio (SNR). Then, the resulting maximum SNR expression and its approximation at high transmission SNR are analyzed to obtain their statistical properties for independently identically distributed (i.i.d.) Rayleigh fading channels. Based on the properties of the approximate maximum SNR, the average symbol error probability (ASEP) is investigated, leading to an explicit diversity order and array gain. The ergodic achievable rate is also studied, giving a tight closed-form upper bound. The theoretical analysis is finally validated by Monte Carlo simulations.
Keywords :
Monte Carlo methods; Rayleigh channels; amplify and forward communication; antenna arrays; approximation theory; array signal processing; channel coding; error statistics; Monte Carlo simulation; Rayleigh fading channel; amplify-and-forward multiple antenna relay system; array gain; average symbol error probability; destination terminal; diversity order; ergodic achievable rate; high transmission SNR expression; optimal relay precoding; performance analysis; signal-to-noise ratio; single antenna source; statistical property; tight closed-form upper bound; two hop AF transmission; Approximation methods; Error probability; Multiple antennas; Performance analysis; Relays; Signal to noise ratio; Amplify-and-forward (AF); Rayleigh fading; ergodic achievable rate; error analysis; multiple-antenna relay networks;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2011.082911.110042
