Modern digital communications has created a demand for optimum processing systems able to receive low power signals in the presence of noise. Since reference oscillators may drift and any part of the communications system may be in motion, receivers must be able to track signal frequency and phase. Knowledge of bit transition locations relative to the beginning of a binary message must also be determined. An all digital receiver to meet these requirements has been analyzed, designed, and implemented. Implementation includes an analog hardware communication channel with A/D converters and a PC interface. Structured programming in Matlab is then used for coherent processing and demodulation of signals. 
 

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