Multiple Sub-intervals Integration Period Optimization for Noncoherent UWB-PPM Receiver in Sparse Multipath Channels
稀疏多径信道下非相干UWB-PPM接收机的多区积分优化方法

The non-coherent receiver is attractive for UWB system due to its implementation simplicity,which, however,is also accompanied with its performance degradation.As an effective optimization method,the integration interval selection is usually performed under the single-interval constraint among existed literatures, to the best knowledge of the authors,which not only results in large searching computation complexity but also could not reach the so-called optimal performance.In this paper,a multiple sub-intervals optimization method is proposed based on the derivation of closed-form BER performance expression of the non-coherent receiver and its corresponding modification under small time-bandwidth product condition.It is shown from the numerical results that the BER performance of the multiple sub-intervals optimization method is obviously superior to the single-interval method,especially in those sparse multipath channels.