Method and device for source-controlled channel decoding wih a Kalman filter

摘要

The method involves receiving data in a receiver, which are transmitted over a transmission path in consecutive frames of a predetermined number of bits. The received data are processed by a maximum likelihood algorithm or a maximum. Aposteriori probability algorithm, by the use of metric increments. The metric increments for at least one bit position are calculated in dependence on a current probability value, which is a measure of the probability that the bit position has a predetermined value. A monitored probability value is used for determining the current probability value, which is determined from a recently processed frame or a currently processed frame. The current probability value is determined in such way, that the sum of the deviations of an error-free probability value, formed for a number of frames, and the probability value determined for the current frame, remains minimal.