Patent ID: 7376192
Filing Date: 2008-05-20
Classification: H04B,H04L

Abstract:
1. A receiver unit comprising: a receiver for receiving a pilot signal from a transmit antenna located at a transmitter unit; and a processor for performing the following steps: to the transmit antenna using feedback bits that were sent in the past to the transmitter unit; said processor also performing the computing, generating, determining and quantizing steps to generate a feedback bits for an imaginary part of the complex coefficient of the channel tap associated with the channel of the pilot signal; a transmitter for sending the two feedback bits corresponding to a channel tap over a feedback channel to the transmitter unit which uses the feedback bits to optimize the subsequent transmission of data to the receiver; wherein said processor uses more than two feedback bits per channel tap to send a more complete channel estimate to the transmitter unit 1) during an initial synchronization between the receiver and the transmitter unit; 2) when said transmitter unit requests a resynchronization between the receiver and the transmitter unit; 3) when said processor decides to send the more complete channel estimate to said transmitter unit; or 4) at periodic intervals.