超宽带能量检测接收机的积分时间优化方法

Optimization of Integration Time for UWB Energy Detection Receivers

研究超宽带(UWB)能量检测接收机的积分时间优化估计问题.基于信号能量检测模型,室内信道能量扩散模型及中心极限近似理论,推导出多径信道下积分时间对误码率的影响,提出了一种基于最小平均误码率准则的积分区间优化估计方法,得到了低信噪比条件下最优积分时间与信道功率延迟时间常数之间的对应关系和高信噪比条件下最优积分时间的曲线拟合修正方法.理论分析和仿真结果验证了所提方法的有效性.

Investigates the problem of integration time optimization for ultra-wideband（UWB） energy detection receivers（ED-UWB）.Based on the energy detection model,diffusion model for UWB indoor propagation and central limit theorem,a new estimation method of optimal integration time under multipath environment is proposed.The criteria of minimizing the average bit error probability（BEP） is adopted.It is shown that under the environment of low SNR,the optimal integration time is related with the power decay time constant,while under the environment of high SNR,a curve fitting amendment is adopted.Theoretical analysis and simulation proved the effectivity of the algorithm.