Doppler Jitter Versus Digital Error Rate

Abstract

In the design of digital communications systems, the error rate is the criterion which is invariably emphasized. In many digital systems, however, there is relative motion between transmitter and receiver which must be controlled by making use of Doppler frequency information. A coherent digital system is herein modeled, in which the trade-off that exists between Doppler measurement capability and subcarrier demodulation error rate is quantitatively presented. System parameters which effect only one of the two above criteria are initially optimized. The dependence of performance on the remaining system parameters is then analytically and graphically presented.