Title :
Two-level MMSE relay strategy for an AF wireless relay network
Author :
Kanghee Lee ; Kwon, Hyuck M. ; Wenhao Xiong ; Hyunggi Kim ; Shuang Feng ; Hyuncheol Park ; Lee, Y.H.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Wichita State Univ., Wichita, KS, USA
Abstract :
This paper presents optimal amplify-and-forward (AF) relay amplifying matrices based on the minimum mean square error (MMSE) criterion for a cooperative AF wireless relay network consisting of a one-source-one-destination node pair and two-level N relay nodes. During data transmission, power is constrained at the source node, at the relay nodes in the first and the second levels, and at the destination node. In addition, this paper considers the case that power is intentionally not constrained. Hence, for the no-power constraint example, a positive scaling factor is employed to meet the target signal-to-noise ratio (SNRTGT) at the destination node. With the derived optimal relay amplifying matrices, bit error rate (BER) of the wireless relay network under both power and no-power constraint is simulated.
Keywords :
amplify and forward communication; cooperative communication; error statistics; least mean squares methods; matrix algebra; radio networks; relay networks (telecommunication); BER; SNR; amplify-and-forward relay amplifying matrix; bit error rate; cooperative AF wireless relay network; data transmission; minimum mean square error; one-source-one-destination node; scaling factor; signal-to-noise ratio; two-level MMSE relay strategy; two-level N relay node; Bit error rate; Cost function; Iterative methods; Relays; Signal to noise ratio; Vectors; Wireless communication;
Conference_Titel :
Communication, Control, and Computing (Allerton), 2012 50th Annual Allerton Conference on
Conference_Location :
Monticello, IL
Print_ISBN :
978-1-4673-4537-8
DOI :
10.1109/Allerton.2012.6483420
