基于中国医用体域网频段的物理层方案设计及干扰分析

Physical Layer Proposal Design and Interference Analysis Based on Chinese Medical Band in Wireless Body Area Network

该文基于中国医疗体域网的专用频段提出了采用扩频的OQPSK调制方案,并在多种干扰的背景下进行分析,仿真结果表明该方案对宽带干扰具有较好的抑制性能,但是由于接收端帧检测算法虚警率较高而对窄带干扰较为敏感。为此提出基于两次延迟自相关的帧检测算法,并验证该算法对宽带和窄带干扰都有较好的抑制性能。该文的研究成果可以为我国无线体域网标准制定提供技术参考,目前该调制方案已被IEEE802.15.4n采纳。

An OQPSK modulation scheme used spread spectrum is proposed which is based on the Chinese medical band. The analysis is done under variety of interference, the simulation results indicate that this scheme has good performance of the broadband interference suppression, but is sensitive to the narrowband interference because of high false alarm rates of frame detection. A new frame detection algorithm based on twice delayed-autocorrelation is proposed, and it is verified that the algorithm exhibits better performance for narrowband and wideband interferences. The recording results of this paper can provide technical reference for standards development of wireless body area network standards. Currently, this scheme has been adopted in IEEE802.15.4n.