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.