Abstract
The paper presents the results of a software study of multiple cochannel interferers in a digital system, employing Gaussian minimum shift keying (GMSK) modulation with a bandwidth data rate product BbT = 0.3. The bit-error rate (BER) performance was determined in a Rayleigh and log-normal fading environment typically encountered in mobile radio systems. It has been shown that the error rate is independent of the number of interferers present when the total S/I ratio of up to 6 interferers are considered. Additional performance measures were investigated such as block-error rates, the probability, P(m,n) of having m errors in a block of length n, burst and gap-length distributions. These measures have shown that the interference causes errors to occur in a more bursty manner than Gaussian noise.
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