Abstract
A channel-sharing method was proposed to improve the energy efficiency per detection task in distributed radar sensor network. The sensor nodes transmitted their local test statistics (LTS) to the fusion center in approximately descending order of their LTSs by modifying the value of backoff timer and frame interval according to the value of their LTSs. Simulation results show that, compared with the method using dedicated channels to transfer data to the fusion center, the occurrence of the discrepancy between the global decisions of the two methods is less than 30 per a million tests. The increased amount of transmitted data, however, is not more than 5%, and the channel bandwidth of the system is reduced to of the original. Therefore, the proposed method fulfills the evident decrease in communication bandwidth, at a very small cost of detection performance.
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