Patent Document ID: 20110128997
Application ID: 12917126
Patent Flag: 0

Claim One:
1. A method implemented by a receiver for separating multiple component signals carried in a composite signal that have been spread over time and frequency, the method comprising: receiving the composite signal over a wireless channel using multiple diversity branches; arranging samples of the composite signal along time, frequency, and diversity dimensions to obtain a composite signal tensor; and separating the component signals by fitting a constrained tensor model of the composite signal to the composite signal tensor in an alternating least squares estimation process, alternating during any given iteration of the process between fitting different unfolded representations of the constrained tensor model to corresponding unfolded representations of the composite signal tensor, wherein the constrained tensor model models the composite signal as a linear combination of multiple rank-one tensors associated respectively with the multiple component signals, each rank-one tensor being constrained according to the spreading of the associated component signal over time.