A Digital Speech Terrane Communicator Based on Software Radio
This paper deals with a digital speech communicator of very low frequency and low bit digital communication based on software ratio,which uses the technique of QPSK and FEC coding. The result of computer simulating and DSP programming shows that digital speech terrane communicator has the character of higher power magnify efficiency,better speech quality and far transmission distance,comparing with digital sample band terrane communicator based on the same hardware flat, conditioned the same bandwidth.