随着频谱资源日益紧张，在免授权频段开展可靠的星地、空地、蜂窝等无线通信系统设计已成为提高频谱资源利用效率、缩短通信系统研制周期的新兴研究热点。提出一种在ISM频段下的可靠无线通信系统。该系统采用基于载波监听的无线净空技术实现公用资源下的可靠频谱占用，并结合基于先验自干扰抑制的收发信机软硬件设计，实现ISM频段异构网络共存下的可靠通信。针对该系统固有的自干扰问题，提出基于先验信息的射频AD清零策略和结合射频链路的周期控制射频开关的设计，实现通信系统误码率及环路跟踪性能不受自干扰影响。最后，通过软硬件仿真和实物测试验证该方案的有效性。
The design of reliable wireless communication systems in the unlicensed frequency band has become an emerging research hotpot to improve the utilization efficiency of spectrum resources and shorten the development period with the increasing shortage of spectrum resources. This work proposes a reliable wireless communication system in ISM band based on new wireless channel clearing technique and a priori self-interference suppression method. In order to address the inherent self-interference problem of the proposed system, this work proposes a priori information-assistant radio frequency AD clearing strategy, which avoids the influences of self-interference on the bit error rate and loop tracking performance of the communication system. Finally, the performance of the proposed system is verified through software and hardware simulations and experiments.
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