Patent ID: 7599978
Filing Date: 2009-10-06
Classification: H03H

Abstract:
1. A method of decimating a digital signal, x(n), where n is an integer, the method comprising: generating the digital signal, x(n), as part of a radio communication process; determining a signal vector, y(k), of size M by partitioning samples of the digital signal, x(n) according to sampling phases of the samples, wherein each element of the signal vector, y(k), is a signal constructed with a same sampling phase; projecting the signal vector, y(k), onto an N-dimensional sub-space, wherein N is an integer and N<M; determining a covariance matrix R determining N eigen vectors corresponding to N greatest eigen values of the covariance matrix, R determining an M×N or N×M matrix V, comprising the N eigen vectors, wherein the signal vector, y(k), is projected onto the N-dimensional sub-space in accordance with wherein V H is the Hermitian transpose of the matrix, V, and z(n) is a decimated signal.