Differentially detected GMSK signals in CCI channels for mobilecellular telecommunication systems
Shin, S.S.; Mathiopoulos, P.T.
Vehicular Technology, IEEE Transactions on
Volume 42, Issue 3, Aug 1993 Page(s):289 - 293
Digital Object Identifier 10.1109/25.231880
Summary:The performance of conventional and decision feedback differential
detection receivers for Gaussian minimum-shift keying (GMSK) signals
transmitted in the presence of cochannel interference (CCI) and additive
white Gaussian noise (AWGN) is evaluated. For the interference, the
authors adopt a model which includes N statistically independent static
as well as faded CCI. Various bit-error-rate (BER) performance
evaluation results have indicated that the receiver under investigation
performs better as compared to other more conventional receiver
structures. Especially significant BER improvements are obtained for the
static CCI channel. For example, it is shown that with a
carrier-to-interference ratio of 14 dB, the performance of a 2-b
decision feedback differential receiver outperforms a conventional 2-b
differential detector by more than 14 dB (at a BER 10-3). For
the faded CCI, the improvement is less: mainly they result in
error-floor reductions of about half an order of magnitude. By comparing
the performance of static and faded CCI, it was also found that for a
given C/I, the performance of the former would depend on the number of
interferers, whereas this is not the case for the latter
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