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为了解决超宽带(UWB)与现有窄带无线通信系统干扰问题,采用高斯7阶导脉冲作为UWB原始脉冲,使用Tent混沌序列作为扩频序列码,提出混沌扩频-载波调制算法,设计了一种混沌超宽带频率自适应检测避让(DAA)方案,可以保证稳定的UWB正常发射功率,具有较高的传输效率,能进行无间断通信.仿真结果表明,产生的自适应陷波脉冲能够实现任意频段陷波,直接序列扩频系统中采用Tent混沌序列扩频码的误码率性能明显优于传统伪随机序列扩频码,具有灵活的窄带干扰抑制能力.
In order to solve the problem of interference between UWB and existing narrowband wireless communication systems, Gaussian 7th-order pulse is adopted as UWB original pulse, and Tent chaos sequence is used as spreading sequence code. A chaos spread spectrum-carrier modulation algorithm is proposed and a The chaos UWB DAA scheme can guarantee the stable transmitting power of UWB with high transmission efficiency and can communicate without interruption.The simulation results show that the generated adaptive notch pulse can achieve any Band notch, direct sequence spread spectrum system using Tent chaotic sequence spreading code bit error rate performance is significantly better than the traditional pseudo-random sequence spreading code, with flexible narrowband interference suppression.