| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 86 ===
The service quality of a mobile communication system is often measured by the outage probability, i.e., the probability that a receiver's BER (or carrier - to - noise ratio, CIR) performance is below a pre - specified threshold. Based on the outage probability, a system's capacity is defined as the number of active users it can support without incurring outage. Although frequency reuse enhances the capacity of a cellular mobile communication system, the co - channel interference (CCI) it induces also put a limit on the system capacity.
The purpose of this thesis is to investigate the performance of several GMSK receivers in the presence of CCI and frequency - selective fading.We consider the case when both the desired signal and co - channel interference suffer from Rician fading. The group of noncoherent receivers we study include i) one - bit differential detection, ii) one - bit differential detection with decision feedback and iii) two - bit differential detection. We also examine a coherent receiver based on Laurent decomposition and Viterbi - type detection.
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