期刊
IEEE TRANSACTIONS ON COMMUNICATIONS
卷 51, 期 9, 页码 1502-1511出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2003.816943
关键词
bandwidth-efficient signaling; constrained coding; long intersymbol interference (ISI); Nyquist rate; soft intersymbol interference (ISI) cancellation
Faster-than-Nyquist signaling introduces inter-symbol interference, but increases the bit rate while preserving the signaling bandwidth. For sinc pulses, it has been established that with a small increase in the signaling rate beyond the Nyquist rate, there is no reduction in the minimum Euclidean distance for binary signaling. In this paper, we generalize these observations to the family of raised-cosine pulses. The structure of the error events that reduce the minimum distance is examined, and constrained coding ideas are suggested that theoretically allow even faster signaling. Then we propose ways of practically achieving these gains by designing appropriate constrained codes and through equalization and iterative joint equalization and decoding (turbo equalization).
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