MSE-Based Source and Relay Precoder Design for Cognitive Radio Multiuser Two-Way Relay System

Provided by: Auburn University
Topic: Mobility
Format: PDF
The authors consider joint design of source and relay pre-coders in a cognitive multiuser two-way relay system, which supports simultaneous transmission of multiple secondary users concurrently with primary network with the help of a relay node. The design criterion is to minimize the sum Mean Square Error (MSE) of all users under a transmit power constraint for each transmitting node while causing no interference to the primary network. To solve this non-convex optimization problem, an iterative algorithm is proposed to iteratively solve for the pre-coding matrices at secondary source nodes and relay node, and then the decoding matrices at secondary nodes. To reduce the computational complexity, a matrix distance based non-iterative algorithm is also proposed.

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