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中 国 科 学 技 术 大 学
本 科 毕 业 论 文
题 目 全双工通信中的自干扰消除技术
英 文The Technology of Self-Inte...................................................32
数字干扰消除.......................................................................................33
数字消除原理.....................................................................................33
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数字消除理论推导.............................................................................33
数字干扰消除分析与小结.................................................................38
第六章 完毕语...................................................................................................38
参考资料...............................................................................................................39
致谢.......................................................................................................................41
摘 要
要实现全双工通信，要克制诸多困难，其中最主要的瓶颈就是收发机的自干扰问题。当发射机发送某个信号时，其中的局部能量会被自身的接收装置接收到。如果正好发送与接收信号同频率，就会产生干扰。并且由于信号源离自身的接收机很近，所以自己发射出去的信号能量可能会比接收到的信号能量大，甚至高达100dB以上。为了能正确解码所需要接收的信号，就要求我们的自干扰消除性能至少达到100dB。目前世界上所研究的都是多级消除，即天线干扰消除、射频干扰消除、数字干扰消除等来达到更好的消除性能。其中天线干扰消除一般可达40+dB，射频域和数字域干扰消除均可达30+dB，已能初步满足实验条件下的全双工通信。
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关键词 : 全双工、自干扰、干扰消除
Abstract
To achieve full-duplex munication must overe many difficulties, and what the most important is the self-interference of transceiver. When a transmitter transmits a signal, part of the energy will be received by the itself. If you send and receive signals exactly the same frequency will cause interference. Since the signal source and the receiver are placed close, the signal transmited by itself may be stronger than the received signal, even up to more than 100dB. In order to correctly decode the received signal, it is required that the performance of interference achieve at least 100dB. The study of the world are multi-stage elimination, such as antenna interference cancellatio