Behavior of PCM/PM/BI-phase receivers in non-ideal channels

The performance of the residual carrier communication system that employs PCM/PM modulation technique with imperfect Bi-phase (or Bi-φ) data format and band-limited channels are investigated in this paper. Imperfect data stream consists of data imbalance and data asymmetry. Separate effects of data asymmetry, unbalanced data stream and InterSymbol Interference (ISI) caused by band-limited channel on performances of PCM/PMI/Bi-phase receivers are investigated. Only the effects of imperfect carrier tracking induced by an imperfect data stream are considered. The Symbol Error Rate (SER) performance degradation due to the presence of imperfect data stream is evaluated and compared with the results obtained by computer simulation. Furthermore, the SER performance is analyzed in the presence of band-limited channel. The effect of the ISI created by a band-limited channel on the system performance is evaluated and compared with the computer simulation results for an ideal low-pass filter