Patent ID: 6757701
Filing Date: 2004-06-29
Classification: H03M

Abstract:
A method for implementing a linearly approximated Log MAP algorithm, said implementation involves calculating MAX*(a(n),b(n)) function, said method comprising the steps of:receiving a(n), b(n) and a value DE where DE is a threshold value for |a(n)âˆ’b(n)|; calculating (a(n)+b(n)+DE)/2 and generating at least one intermediate result, said at least one intermediate result reflecting at least one relationship between at least two elements out of a(n), b(n) and DE; providing an MAX*(a(n),b(n)) result selected from a group comprising of a(n), b(n) or (a(n)+b(n)+DE)/2, said selection dependent upon the at least one intermediate result; and performing decoding of a received signal using the provided MAX*(a(n),b(n)).