This paper gives performance results for transversal-filter equalization of Quadri phase phase-shift-keyed (QPSK) signals with two-component multipath and demodulator phase error. An analytical expression for optimum, minimum mean-square-error tap weights in terms of the multipath and signal parameters is given. Probability of error results for no equalization and equalization with adaptive decision-feedback tap-weight adjustment are compared. The results show that significant improvement can be obtained with relatively simple equalizer structures. Copyright © 1974 by The Institute of Electrical and Electronics Engineers, Inc.
R. E. Ziemer and C. R. Ryan, "Equalization Of QPSK Data Transmission In Specular Multipath," IEEE Transactions on Aerospace and Electronic Systems, vol. AES thru 10, no. 5, pp. 588 - 594, Institute of Electrical and Electronics Engineers, Jan 1974.
The definitive version is available at https://doi.org/10.1109/TAES.1974.307850
Electrical and Computer Engineering
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01 Jan 1974