Hyperactive Chipmunk Radio
G. H. McGibney, S.T. Nichols · Kluwer Academic Publishers eBooks · 2005
The hyperactive chipmunk radio modulates voice signals so that the radio waves behave the same in the radio medium as sound waves normally do in the acoustic medium. This is accomplished by segmenting the voice signal and compressing the segments in time before transmitting them through the radio channel. If the compression factor is correct, the distortion characteristics of the radio channel will match those normally encountered in the acoustic channel and sound natural to the ear. The radio signal will then inherit many of the good properties of acoustic voice signals including resistance to flat fading and tolerance of frequency selective fading.