Detection processes for distorted binary signals

The paper describes various iterative detection processes that are suitable for use in a synchronous serial data-transmission system, operating at a transmission rate of up to 10,000 bits per second over a slowly time varying channel. The methods of operation of the different detection processes are first described, and then the results of computer simulation tests are presented, comparing the tolerances of the detection processes to additive white Gaussian noise with the tolerances of conventional linear and non-linear equalizers. Several different time invariant channels are used in the tests. It is shown that a relatively simple detection process can achieve a considerable improvement in tolerance to noise over both linear and non-linear equalizers of optimum design.