A comparative study of narrowband microcellular speech transmission schemes

Experiments are conducted on a number of mobile radio systems that are suitable for operation in nondispersive microcellular networks. It becomes apparent that the selection of the type of modem and the number of its levels, the choice of speech codec to be used, and whether to deploy a channel codec, depends on the channel signal-to-noise ratio (SNR) and teletraffic demand, if the power consumption of the handheld portable is to be minimized. Following the implications of the authors' limited number of experiments, they generalize their findings to some of the requirements of an adaptive transceiver that might be deployed in the next generation of mobile radio networks. >

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