Patent ID: 6295311
Filing Date: 2001-09-25
Classification: H04B

Abstract:
A method for estimating the phase of a noncoherently detected orthogonal signal comprising the steps of:sampling first and second received signals, each of the first and second received signals being representative of a transmitted signal;determining a first value from the first received signal indicative of a likelihood that a first estimated signal corresponds to the transmitted signal;determining a second value from the first received signal indicative of a likelihood that a second estimated signal corresponds to the transmitted signal;determining a third value from the second received signal indicative of a likelihood that the first estimated signal corresponds to the transmitted signal;determining a fourth value from the second received signal indicative of a likelihood that the second estimated signal corresponds to the transmitted signal;developing an index from the first, second, third and fourth values;selecting a first selected value from the first and second values based on the index;developing a first weight from the first selected value;selecting a second selected value from the third and fourth values based on the index;developing a second weight from the second selected value;scaling the first and second values with the first weight; and,scaling the third and fourth values with the second weight.