Title :
Beamforming and Combining in Two-Way AF MIMO Relay Networks
Author :
Arti, M.K. ; Mallik, Ranjan K. ; Schober, Robert
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. - Delhi, New Delhi, India
Abstract :
In this letter, we propose a beamforming and combining scheme for a two-way amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay network. An approximate expression for the symbol error rate of the scheme in Rayleigh fading for M-ary phase-shift keying is obtained based on the moment generating function of the instantaneous received signal-to-noise ratio. The diversity order is also analytically derived. It is shown by simulations that the proposed scheme outperforms existing schemes for beamforming and combining in two-way AF MIMO relay systems. We also discuss beamforming and combining in a two-way AF MIMO relay system with estimated channel gains.
Keywords :
MIMO communication; Rayleigh channels; amplify and forward communication; approximation theory; array signal processing; channel estimation; diversity reception; phase shift keying; relay networks (telecommunication); M-ary phase-shift keying; Rayleigh fading; approximate expression; beamforming-and-combining scheme; channel gain estimation; diversity order; instantaneous received signal-to-noise ratio; moment generating function; symbol error rate; two-way AF MIMO relay networks; two-way amplify-and-forward multiple-input multiple-output relay network; Array signal processing; Diversity reception; MIMO; Nickel; Relays; Signal to noise ratio; Vectors; Amplify-and-forward (AF) protocol; channel estimation; cooperative diversity; multiple-input multiple-output (MIMO) system;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.052413.130731
