Implementation aspects of a transmitted‐reference UWB receiver

Abstract

In this paper, we discuss the design issues of an ultra wide band (UWB) receiver targeting a single-chip CMOS implementation for low data-rate applications like ad hoc wireless sensor networks. A non-coherent transmittedreference (TR) receiver is chosen because of its small complexity compared to other architectures. After a brief recapitulation of the UWB fundamentals and a short discussion on the major differences between coherent and non-coherent receivers, we discuss issues, challenges and possible design solutions. Several simulation results obtained by means of a behavioral model are presented, together with an analysis of the trade-off between performance and complexity in an integrated circuit implementation.

Unified Analysis of UWB Transmitted-Reference Schemes in the Presence of Narrowband Interference

“…8 It has been shown that we can relax the assumption of perfect synchronization in TR signaling due to its robustness against synchronization errors [54], [55]. However, exactly how this synchronization is achieved [54], [56] and the sensitivity analysis of synchronization errors [55] are beyond the scope of this paper.…”

Downlink multiple access schemes for transmitted reference pulse cluster UWB systems

“…However, in order to employ the original TR schemes in UWB systems, there are still important problems needed to be addressed, one of which is that to avoid inter-pulse interference (IPI) and/or achieve analog noise averaging over multiple frames, the required autocorrelation delay has to be longer than the UWB channel length. Since the maximum delay spread of an UWB channel usually ranges from tens to hundreds of nanoseconds, implementing such a long wideband delay line is not feasible for a realistic UWB system [4,8]. Recently, an improved TR scheme, referred to as transmitted reference pulse cluster (TRPC), was proposed [9].…”

Improved transmitted reference pulse cluster scheme for ultra wideband communication systems

“…For a UWB system, T g typically ranges from 50 ns to more than 100 ns. Some recent work has suggested that implementing accurate wideband DLs longer than 10 ns is unacceptable for a practical UWB system [7]. To address the long-delayline problem of TR, Gifford and Win [8] proposed a frequency multiplexed TR, where the data and reference waveforms were multiplexed in disjoint frequency bands.…”