Performance analysis of communication direction for two-sensor tandem binary decision system

Authors:
Enbin Song;Xiaojing Shen;Jie Zhou;Yunmin Zhu;Zhisheng You
Affiliations:
Department of Mathematics, Sichuan University, Chengdu, Sichuan, China;Department of Mathematics, Sichuan University, Chengdu, Sichuan, China;Department of Mathematics, Sichuan University, Chengdu, Sichuan, China;Department of Mathematics, Sichuan University, Chengdu, Sichuan, China;Department of Computer Science, Sichuan University, Chengdu, Sichuan, China
Venue:
IEEE Transactions on Information Theory
Year:
2009

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Abstract

In this paper, the communication direction problem of a two-sensor tandem binary decision system is considered. Rigorous analysis shows that the performance of communication from the sensor with higher noise power to the sensor with lower noise power is not always better than the performance of the reverse communication direction when the signal and sensor noises are both Gaussian. This result can be extended to a more general twosensor tandem binary decision system without the assumption of a specific data distribution. This seems somewhat counterintuitive but has significance for optimization design of sensor communication direction. Computer experiments support our analytic results and illustrate interesting information which requires need further study.