基于CMLE的改进型IR-UWB同步算法

Modified CMLE-based Synchronization Algorithm for IR-UWB Communications

提出了一种基于CMLE的改进型IR-UWB同步算法,包含3项优化方案:帧级噪声抑制、噪声模板互相关估计以及滑动相关搜索.其中,帧级噪声抑制、噪声模板互相关估计通过加强噪声抑制能力从而改善算法在低信噪比情况下的参数估计精度;滑动相关搜索进一步优化了高信噪比情况下参数估计的均方误差性能.数学分析及仿真实验的结果表明每项优化方案均在不同程度上实现了预期的性能优化.

Based on CML estimation,a modified synchronization algorithm is proposed for IR-UWB system,which involves three improved schemes:Frame-level Noise Suppression(FNS),Noise Template Cross-correlation Estimation(NTCE) and Slide Correlation Search(SCS).The FNS and NTCE can improve the performance of synchronization greatly in the condition of low SNR by reconfiguring the method of noise suppression.While SCS lowers the MSE low bound in the condition of high SNR.Both mathematical analysis and simulation indicate ...