Error rate performance of duobinary coded MSK and TFM with differential detection in land mobile communication systems

Two continuous phase constant envelope modulation schemes are considered for use in digital mobile radio communication systems. These two schemes: duobinary coded MSK and tamed frequency modulation (TFM) use partial response signaling to achieve efficient power spectrum. Therefore, they are suitable candidates for the application of digital data transmission via mobile radio where spectrum efficiency is an important consideration. The mobile communication channel is characterized by fast Rayleigh fading and cochannel interference resulting from the reuse of the channels. The error rate performance of duobinary coded MSK and TFM has been studied under these environment with differential detection. The probability of error has been calculated by numerical integrations for different cases of slow and fast fading and cochannel interference.

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