IEE Proceedings I Communications, Speech and Vision, 1990
A systematic trellis encoding technique based on trellis partitioning and on newly defined branch... more A systematic trellis encoding technique based on trellis partitioning and on newly defined branch distances is proposed. This encoding technique avoids the usual exhaustive search for finding good trellis codes. It gives the lower and upper bounds on free distance which depend only on the encoder memory and the signal space. The optimal combination of signal set and trellis is
The letter describes a comparison of some receiver structures suitable for trellis-coded modulati... more The letter describes a comparison of some receiver structures suitable for trellis-coded modulation on channels causing intersymbol interference. Simulation results show that a Viterbi decoder treating trellis coding and intersymbol interference as one compound encoding mechanism yields the best performance, which at P/sub b/=10/sup -4/ is about 6 dB in S/N better than any other receiver structure. >
The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact w... more The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact which restricts practical applications to small values of m. Cost can be reduced substantially by restricting either the metric or the number of states. Simulation results show the trade-off between cost reduction and performance.
IEE Proceedings I Communications, Speech and Vision, 1990
A systematic trellis encoding technique based on trellis partitioning and on newly defined branch... more A systematic trellis encoding technique based on trellis partitioning and on newly defined branch distances is proposed. This encoding technique avoids the usual exhaustive search for finding good trellis codes. It gives the lower and upper bounds on free distance which depend only on the encoder memory and the signal space. The optimal combination of signal set and trellis is
The letter describes a comparison of some receiver structures suitable for trellis-coded modulati... more The letter describes a comparison of some receiver structures suitable for trellis-coded modulation on channels causing intersymbol interference. Simulation results show that a Viterbi decoder treating trellis coding and intersymbol interference as one compound encoding mechanism yields the best performance, which at P/sub b/=10/sup -4/ is about 6 dB in S/N better than any other receiver structure. >
The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact w... more The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact which restricts practical applications to small values of m. Cost can be reduced substantially by restricting either the metric or the number of states. Simulation results show the trade-off between cost reduction and performance.
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Papers by Jerry Zou