Monobit Digital Eigen-Based Receiver for Transmitted-Reference UWB Communications

Abstract—Transmitted-reference impulse radio (TR-IR) is a low complexity UWB system which is suitable for highly dis-persive multipath channel. However, TR-IR requires a wideband analog delay line which has high complexity and high energy consumption. In this letter, we propose a digital eigen-based (EB) receiver which first converts the analog signal to digital signal and then demodulates the received signal in digital domain. Computer simulation results show that the proposed receiver can outperform the conventional autocorrelation receiver. We also proposed a monobit digital EB (MEB) receiver as a low complexity alternative to the EB receiver. The bit-error-rate performance of MEB receiver have also been studied theoretically to show the quantization effect in this letter. Index Terms—Eigen-based (EB) receiver, autocorrelation re-ceiver (AcR), impulse radio (IR), ultra-wideband (UWB). I