A distributed approach to precoder selection using factor graphs for wireless communication networks

作者：Guerreiro Igor M^*; Hui Dennis; Cavalcante Charles C

来源：Eurasip Journal on Advances in Signal Processing, 2013, 83.

DOI：10.1186/1687-6180-2013-83

• Distributed optimization
• Message-passing algorithm
• Factor graphs
• Precoder selection

This paper addresses distributed parameter coordination methods for wireless communication systems. This proposes a method based on a message-passing algorithm, namely min-sum algorithm, on factor graphs for the application of precoder selection. Two particular examples of precoder selection are considered: transmit antenna selection and beam selection. Evaluations on the potential of such an approach in a wireless communication network are provided, and its performance and convergence properties are compared with those of a baseline selfish/greedy approach. Simulation results for the precoder selection examples are presented and discussed, which show that the graph-based technique generally obtains gain in sum rate over the greedy approach at the cost of a larger message size. Besides, the proposed method usually reaches the global optima in an efficient manner. Methods of improving the rate of convergence of the graph-based distributed coordination technique and reducing its associated message size are therefore important topics for wireless communication networks.

• 出版日期2013