Information transmission between two communicators with relative motion

Abstract

In information transmission between two communicators with relative motion, the information transmission rate and efficiency are influenced by the Doppler effect and the relativistic effect. The received signal power P′ = αP is established for a sound or radio channel; then, taking the Doppler effect into account, the capacity of the AWGN Shannon channel and the capacity region for the AWGN multiple-access channel with and without feedback are determined. Influences of the Doppler effect and the relativistic effect on the asymmetry in information transmission efficiency are also discussed; it is found that the asymmetry favors the information transmission from a stationary transmitter to a moving receiver for the AWGN channel with the relativistic Doppler effect, while it favors that from the moving to the stationary for the AWGN channel with only the classical Doppler effect.