Patent ID: 9240909
Filing Date: 2016-01-19
CPC Classification: H04L

Claim Text:
1. A method of channel estimation implemented in a receiver having multiple antennas configured to receive signals over a plurality of orthogonal tones comprising at least one common pilot tone shared by a plurality of users for transmission of pilot signals and a plurality of dedicated pilot tones, each dedicated pilot tone being allocated to one of the plurality of users for transmission of pilot signals, comprising: concurrently estimating, at the receiver, at least one first channel associated with a first user and at least one second channel associated with a second user based on observations of pilot signals received at the receiver concurrently over at least one first dedicated pilot tone allocated to the first user, at least one second dedicated pilot tone allocated to the second user, and said at least one common pilot tone, wherein estimating said at least one first channel and said at least one second channel comprises: estimating said at least one first channel based on observations of the at least one first dedicated pilot tone allocated to the first user; estimating said at least one second channel based on observations of the at least one second dedicated pilot tone allocated to the second user; and estimating at least one composite channel associated with the first and second users based on observations of said at least one common pilot tone.