Methods and apparatuses for channel estimation in wireless networks

摘要

In a method for estimating a channel at a receiver in a wireless communications network, the receiver obtains channel model parameters for a received signal based on raw channel estimates for the received signal, where each raw channel estimate corresponds to an antenna at the receiver. The receiver combines, for each of a plurality of contiguous subcarriers in the wireless communications network, the channel model parameters to generate a first plurality of combined channel model parameters. The receiver then chooses a first set of indices corresponding to combined channel model parameters from among the first plurality of combined channel model parameters having magnitudes passing a combined channel model parameter threshold. The receiver then estimates the channel in a sparse domain based on the first set of indices.

主权项

1. A method for recovering transmitted data at a receiver in a wireless communications network, the method comprising:
obtaining, at a receiving processor, channel model parameters for a received signal based on raw channel estimates for the received signal, each raw channel estimate corresponding to an antenna at the receiver; combining the channel model parameters to generate a combined channel model matrix including a first plurality of combined channel model parameters, each of the first plurality of combined channel model parameters being associated with a corresponding index from among a plurality of indices; choosing a first set of indices from among the plurality of indices, the first set of indices including indices corresponding to combined channel model parameters from among the first plurality of combined channel model parameters having magnitudes passing a combined channel model parameter threshold; estimating a channel in a sparse domain based on the combined channel model parameters corresponding to the indices in the first set of indices, the estimated channel in the sparse domain having less than m non-zero components, wherein m is less than a number of subcarriers in the wireless communications network; and recovering the transmitted data based on the estimated channel.