Patent ID: 8406326

Claim:
An efficient method of reporting channel state information (CSI) by a transceiver operative in a wireless communication network in which downlink data is modulated onto a plurality of sub-carriers, each having a different frequency, comprising, at each iteration: receiving a plurality of known reference symbols over a subset of the plurality of sub-carriers; selecting a set of sub-carriers using a selection scheme synchronized to the network; for each selected sub-carrier, estimating a frequency response; predicting a frequency response, in a manner synchronized to the network, based on prior frequency response estimates and a time correlation of channel response wherein predicting a frequency response based on prior frequency response estimates further comprises: maintaining a state vector comprising prior values of quantized frequency response estimates of the selected sub-carrier; generating a coefficient vector comprising linear predictive coefficients based on a time correlation of channel response; and multiplying the state vector by the coefficient vector to yield a scalar complex-valued frequency response prediction; subtracting the predicted frequency response from the estimated frequency response to yield a prediction error; quantizing the prediction error; and transmitting the quantized prediction errors for all selected sub-carriers to the network via an uplink control channel.