Andre Bjorn Bjerke

A Comparison of Low Complexity Receivers for TDMA Mobile Wireless Communications

MS Thesis
Date: December 5, 1997

Abstract:

In this thesis, we evaluate and compare several data detection and equalization schemes which can be used in TDMA mobile wireless communication systems. Our primary goal is to identify methods which can achieve an effective trade-off between performance and computational complexity. A secondary goal is to investigate techniques which may readily be applied to a practical system and which must therefore satisfy the requirements and constraints that such a system imposes. We have chosen the Global System for Mobile Communications (GSM) as the framework for our investigations.par Specifically, we compare the performance of decision feedback equalization (DFE) and nonlinear data directed estimation (NDDE) to that of the optimal and highly complex maximum likelihood sequence estimation (MLSE). Our simulation results, obtained in the additive white Gaussian noise channel, as well as under fading conditions and in the presence of adjacent-channel and co-channel interference, suggest that the performance of both the NDDE and the DFE is comparable to that of the MLSE for the signal-to-noise ratio region of interest in practical systems. Thus, they both represent viable lower complexity alternatives to the MLSE detector.

Committee:

Prof. J.G. Proakis (advisor)
Prof. M. Stojanovic
Dr. Zoran Zvonar (Analog Devices)