Patent ID: 6424631
Filing Date: 2002-07-23
Classification: H04B

Abstract:
A rate determination unit for use in a receiver in a communication system that receives an encoded signal at a plurality of different data rates, the communication system being a frame based system having a sequence of data frames each having a plurality of symbols, the rate determination unit comprising:a first hypothesis unit to determine a first hypothesis value at an associated one of the data rates by summing a first plurality of absolute values, the first plurality of absolute values including an absolute value of each discrete symbol; a second hypothesis unit to determine a second hypothesis value at an associated one of the data rates by summing a second plurality of absolute values, each of the second plurality of absolute values being a sum of consecutive discrete symbols; and a hypothesis analyzer to compare selected hypothesis values and determined the frame data rate of each date frame based on such comparisons and output a rate indication signal based on the determined frame date rate.