1. A method for performing channel equalization in a receiver, in which a signal is received from a communication channel, the signal containing symbols formed of binary information by phase shift keying, channel estimation is performed to estimate the properties of the communication channel, and samples are taken of the received signal at intervals, wherein in the method, a determined number of samples are examined, a decision step is taken, in which, to find out the transmitted symbols, the bit decisions are computed on the basis of said defined quantity of samples, and after each decision step it is examined whether said decision step is to be iterated, wherein upon iteration of said decision step, at least some of the bit decisions of the previous decision step are used in addition to the samples under examination, in the computation of the bit decision.