Performance of adaptive equalization and soft-decision decoding techniques over TDMA digital cellular radio channels

The performances of two equalization and soft-decision decoding techniques for transmission over the proposed Telecommunications Industry Association North American TDMA digital cellular radio channels are studied. Simulation results indicate that the maximum likelihood sequence estimation (MLSE) equalizer's performance is slightly better than that of the decision feedback equalizer (DFE). Both equalizer's are about 3-4 dB away from optimal performance at vehicle speeds of 60 mph and are 6-7 dB lower than called for in the IS-54 specification. The results also show that for both techniques, soft decisions provide a decoded bit error rate (BER) of 1% with 2 dB less power than that required for hard decisions.<<ETX>>

[1]  H. Suzuki.  Performance of a new adaptive diversity-equalisation for digital mobile radio , 1990 .

[2]  K. Fukawa,et al.  Adaptive equalization with RLS-MLSE for frequency-selective fast fading mobile radio channels , 1991, IEEE Global Telecommunications Conference GLOBECOM '91: Countdown to the New Millennium. Conference Record.

[3]  M. R. L. Hodges.  The GSM radio interface , 1990 .

[4]  E. Dahlman.  New adaptive Viterbi detector for fast-fading mobile-radio channels , 1990 .

[5]  Joachim Hagenauer,et al.  A Viterbi algorithm with soft-decision outputs and its applications , 1989, IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond.

[6]  Edward G. Tiedemann,et al.  The Design and Development of a Code Division Multiple Access (CDMA) System for Cellular and Personal Communications , 1991, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications..

[7]  Y.-J. Liu.  Bi-directional equalization technique for TDMA communication systems over land mobile radio channels , 1991, IEEE Global Telecommunications Conference GLOBECOM '91: Countdown to the New Millennium. Conference Record.