【摘要】 针对基于OOK(On-off Keying)调制的非相干能量检测UWB接收机误码率性能较差,本文通过二维参数优化,理论上证明了存在积分长度与有效信噪比的最佳参数组合使得误码性能最优,并通过训练序列来估计信噪比和搜索积分长度,在系统实现上给出了简单可靠的求解方法.其中,在系统误码率性能较高区域内,利用高斯分布近似最优判决门限精确解的方法存在较大误差,本文对该近似方法的适用性进行了深入的讨论,利用最小二乘方法对高斯近似方法进行了修正,并给出了易于工程应用的多项式系数.仿真结果表明,本文获得的最优参数组合相对于传统方法,较好地改善了接收机性能;对高斯分布近似的修正方法也有效的减小了误码率性能损失.更多还原

【Abstract】 The optimization on BER performance of UWB non-coherent receiver based on OOK scheme is investigated.The optimum parameters combination of length of integration interval and SNR in the integration interval,which makes the BER minimum,is obtained theoretically and practically.A modified least-squares-based algorithm is proposed in this study,which applies the Gaussian approximation to the exact optimal threshold.Meanwhile,the feasibility of the traditional approximation is explored.The results show that,compared with the conventional method,the optimum parameters proposed in the study increase the system performance greatly.更多还原