Modified maximum likelihood channel estimation

摘要

The present technology relates to a channel estimator configured to operate based on a discrete wave channel model and measured channel responses between a transmitter having at least one transmit antenna and a receiver having at least one receive antenna. The channel estimator comprises a windowed likelihood determiner and a maximization processor. The windowed likelihood determiner is configured to determine a windowed likelihood function based on the measured channel responses, a selected window function, and modeled channel responses defined based on a number of discrete waves according to the discrete wave channel model. The maximization processor is configured to perform maximization of the windowed likelihood function, using initial input in the form of at least one of predetermined wave propagation delay(s) and predetermined wave propagation direction(s) for at least one of the discrete waves, to extract the wave parameters of the discrete waves.

主权项

1. A method of channel estimation based on a discrete wave channel model and measured channel responses between a transmitter having at least one transmit antenna and a receiver having at least one receive antenna, said method comprising the steps of:
determining a windowed likelihood function based on said measured channel responses, a selected window function, and modeled channel responses defined based on a number of discrete waves according to said discrete wave channel model, each one of said discrete waves being associated with wave parameters to be determined including at least one of wave propagation direction(s) and wave propagation delay; performing maximization of said windowed likelihood function, using initial input in the form of at least one of predetermined wave propagation delay(s) and predetermined wave propagation direction(s) for at least one of said discrete waves, to determine the wave parameters of said discrete waves.