Receiver for data transmission system with nonlinearities

Details Receiver for data transmission system with nonlinearities Receiver for data transmission system with nonlinearities

H - Electricity

04

L

340/74

H04L 1/00 (2006.01) H04B 1/12 (2006.01) H04L 25/03 (2006.01)

Patent

CA 2019659

A system for transmitting a data signal at a symbol rate 1/T through a noisy dispersive channel to a data receiver is described. The channel introduces intersymbol interference and noise into the transmitted data signal. The receiver estimates the most likely sequence of transmitted data symbols by keeping track of candidate data sequences that are recursively updated on the basis of likelihood measures which are determined by estimating hypothesized channel outputs in the absence of noise. The hypothesized channel output signals in the absence of noise are estimated using one or more look-up tables. As look-up tables are ideally suited to store nonlinear input-output relations, they can account for any nonlinearity of the channel. Furthmore, because they all operate on digital data symbols, these look-up tables are often more conveniently implemented in digital technology than the linear weighing networks in receivers of the above-mentioned prior art. In this way the ability to handle nonlinear ISI is generally accompanied by a decreased receiver complexity.

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