【摘要】 针对非相干UWB系统的数据包捕获问题,提出了一种联合信号捕获、误码率性能优化与包同步字检测的捕获方案。在信号捕获后发送导频序列实时估计信噪比,并搜索积分窗口长度,以获得最低误码率。给出了数据包捕获模型的合适性能指标,分别采用串行搜索与跳K步搜索策略,结合7位与13位巴克码为包同步字进行数据包捕获,仿真结果表明,三者联合的方案能够在保持一定包捕获性能的同时获得较好的误码率性能。更多还原

【Abstract】 A novel scheme was proposed for the packet acquisition of UWB non-coherent system,which combined frame synchronization with signal acquisition and bit error probability(BEP) optimization.In particular,BEP function was minimized through online signal to noise ratio(SNR) estimation and the search on optimal integral length,as soon as signal acquisition was completed.A theoretical model of the packet acquisition was constructed accurately with suitable criteria,which was verified respectively by a lot of experiments with 7 and 13 bit Barker frame sync code,employing Jump by K steps and serial search algorithm.The results demonstrate the proposed scheme improve significantly the BEP performance under certain packet acquisition performance.更多还原