Method and apparatus for dual demodulation of mobile channel signals

摘要

Selectable demodulation means within a given receiver to demodulate signals potentially subjected to many different types of degradations as typically encountered in mobile communications systems, and to select the best result of provide significant performance improvement is disclosed. In accordance with the method, when an RF signal is received it is sampled and the samples are demodulated. Demodulation is performed using both coherent and non-coherent schemes with the preferred scheme selected according to the quality of performance of each demodulator. Coherent demodulation can provide better performance when the signal is subjected to significant path loss but little fading. Non-coherent demodulation can provide better performance when the signal is subjected to less path loss but significant fading. Details of the method are disclosed.