Analysis of a digital modem for continuous-phase CDMA terrestrial mobile radio communications over the 60 GHz channel

Abstract

This paper reports on the structure and the performance of a band-limited spread-spectrum transmission system employing generalized MSK modulated signals together with asynchronous code-division multiple access. The system is intended for use in short-range terrestrial mobile radio links, particularly intervehicle or vehicle-to-infrastructure communications. The system performance over a 60 GHz short-range mobile radio channel model is analyzed assuming the average bit error rate (BER) as a figure of merit. The BER sensitivity to a number of relevant link parameters, such as the distance between transmit and receive antennas and the receiver speed is investigated. Also, the impact of code tracking errors and of differential encoding/detection of the code chips on the overall performance is discussed.