An Improvement of the Minimum Distortion Encoding.pdf

1132 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. COM-33, NO. 10, OCTOBER 1985 [2] D. J. Torrieri, “Frequency hopping with multiple frequency-shift keying and hard decisions,” IEEE Trans, Cornrnun., vol. COM-32. pp. 574-582, May 1984. [3] R.-H. Dou and L. B. Milstein, “Error probability bounds and approximations for DS spread spectrum communication systems with multiple-tone or multiple-access interference,” IEEE Trans. Com- mun., vol. COM-32, pp. 493-502, May 1984. [4] L. B. Milstein, S. Davidovici, and D. L. Schilling, “The effect of multiple-tone interfering signals on a direct sequence spread spectrum communication system,’’ IEEE Trans. Commun., vol. COM-30, pp. 436-446, Mar. 1982. [5] A. J. Viterbi and I. M. Jacobs, “Advances in coding and modulation for noncoherent channels affected by fading, partial band, and multiple access interference,” in Advances in Communication Sysfems, vol. 4. New York: Academic, 1975. An Improvement of the Minimum Distortion Encoding Algorithm for Vector Quantization CHANG-DA BE1 AND ROBERT M. GRAY Abstract-In this note we present a very simple method for improving the efficiency of minimum distortion encoding for vector quantization. Simulations indicates a reduction of up to 70