4D-8PSK-TCM System for the Specrum and Power Efficient Satellite Communication

Abstract

For the satellite communication, power efficiency and spectrum efficiency are all important requirements to keep the high speed data transmission and longer expectation of operation life of satellite. So, the Consultative Committee for Space Data Systems (CCSDS) has discussed many possible communication technology candidates and eventually has decided the 4D-8PSK-TCM (4 dimensional 8 phase shift keying trellis coded modulation) as one recommendation for X-band satellite communication system. Therefore, it is very important to propose the design structure of transmitter and receiver of the 4D-8PSK-TCM communication system and to evaluate the communication performances. In this paper, at first, the design method of 4D-8PSK-TCM system recommended in CCSDS for X-band satellite communication will be described in detail for the design of the transmitter and receiver. Secondly, the characteristics of peak to average power ratio (PAPR), spectrum characteristic, and constellation characteristic according to the square root raised cosine filtering are determined for each transmission efficiency mode. Finally, BER performances according to each reception processing step are evaluated and analyzed. As simulation results, the trajectory of the transmission signal according to the roll-off factor value and the PAPR characteristic and the spectral characteristic have been obtained. Acceptable PAPR characteristics have been obtained when the roll-off factor values are 0.35 and 0.5, and the spectral waveforms have been confirmed. Especially, it is confirmed that the receiver system using both the auxiliary trellis and the general trellis in the receiver is improved by 2 dB than the single auxiliary trellis system.