Finite resolution digital receiver design for impulse radio ultra wideband communication

Receiver design for impulse radio OR) based ultra wideband (UWB) communication is a challenge, be cause full resolution digital receiver is difficult to implement under today's technology due to high sampling rate required. Some trade offs can be made to the digital receiver, such as limiting amplitude resolution to only 1 bit, which results in a previously considered so termed mono bit receiver. In this paper, we consider the de sign of finite resolution digital UWB receiver. We derive the optimal post quantization processing, and analyze the achievable bit error rate (BER) performance using an approximation of the log likelihood ratio. We evaluate the effect of quantization threshold. The optimal threshold for two bit quantization is obtained. Our work discloses the incremental gain that each sampling bit could bring and the results provide guidelines for designing IR UWB digital receivers.