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Simultaneous Phase Tracking and Detection in Data Transmission Over Noisy Dispersive Channels

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1 Author(s)
Magee, F., Jr. ; Bell Labs.,Holmdel, NJ

A new technique, related to the Viterbi algorithm for simultaneous phase jitter tracking and data detection of signals transmitted over the dispersive channel with Gaussian noise is proposed. This technique produces a reliable phase estimate and avoids the poor receiver performance which occurs with Viterbi decoding in the presence of phase jitter due to the use of a phase estimate derived from unreliable preliminary decisions. The effectiveness of this approach is demonstrated through computer simulation of the voiceband channel. It was found that for the case of a typical meeting the combined requirements of C2 and D1 conditioning and signaled at 14,400 bits/s, no errors were experienced in a computer simulation run of 2000 symbols compared to a previous run with a less sophisticated phase tracking algorithm which experienced 17 errors in 2000 symbols.

Published in:

Communications, IEEE Transactions on  (Volume:25 ,  Issue: 7 )