초록 ▼

A receiver for use in deciding which signal points were sent from a transmitter based on corresponding noise affected signals received over a channel, the transmitter including an encoder which encodes a stream of information symbols into the signal points, the noise affected signals carrying inform

A receiver for use in deciding which signal points were sent from a transmitter based on corresponding noise affected signals received over a channel, the transmitter including an encoder which encodes a stream of information symbols into the signal points, the noise affected signals carrying information about a particular sequence of possible states occupied in a succession of time intervals by a finite state process. The receiver includes feedback circuitry for generating a plurality of different modified versions of each received signal, and a decoder for deciding which signal points were sent, given the received signals, based on estimating the particular sequence of states, and using at least two different modified versions.

대표청구항 ▼

A communication system comprising a transmitter, and a receiver for use in deciding which signal points were sent from said transmitter based on corresponding noise affected signals received over a channel, said transmitter comprising an encoder for encoding a stream of information symbols into said

A communication system comprising a transmitter, and a receiver for use in deciding which signal points were sent from said transmitter based on corresponding noise affected signals received over a channel, said transmitter comprising an encoder for encoding a stream of information symbols into said signal points, said noise affected signals carrying information about a particular sequence of possible states occupied in a succession of time intervals by a finite state means, said receiver comprising feedback circuitry for generating a plurality of different modified versions of each said received signal, and a decoder for deciding which signal points were sent based on estimating said particular sequence of states by using at least two different said modified versions, said decoder storing a plurality of surviving sequences of states each ending in a current state, said feedback circuitry being connected to receive feedback information from said decoder, each said modified version being based on at least some states that are earlier in said surviving sequences than said current states.