Patent ID: 9065555
Filing Date: 2015-06-23
Classification: H04B,H04J,H04L

Abstract:
1. A method of channel estimation, comprising: receiving a signal over a multi-path channel at a receiving port of a circuit; generating a plurality of observation vectors of the received signal; generating a channel covariance matrix of the plurality of observation vectors, wherein the channel covariance matrix is generated based upon a covariance matrix of a noisy vector and a noisy channel covariance matrix, wherein the noisy channel covariance matrix is generated based on a Hermitian transpose of the plurality of observation vectors, wherein generating the channel covariance matrix further comprises subtracting the covariance matrix of the noisy vector from the noisy channel covariance matrix; and identifying a first path by projecting a pulse shaping vector on the channel covariance matrix at different time offsets and selecting the maximum of the projected channel covariance matrix with respect to the time offsets as the first path, wherein the projecting the pulse shaping vector on the channel covariance matrix comprises multiplying a transposed pulse shaping vector with the channel covariance matrix by the pulse shaping vector.