Efficient method and system for offset phasor determination

[0018]The present invention will be described with reference to a system and method for providing a phase offset correction of a channel (e.g., wireless) with reduced computations. An offset vector is computed using a current and / or previous channel impulse responses. A pair of vectors is concurrently and iteratively rotated in opposite directions in order to determine an offset phasor. A first vector of the pair of vectors is initialized with a constant value for its x coordinate and a zero value for its y coordinate. A second vector of the pair of vectors is initialized with the x and y coordinates of the offset vector. The first and second vectors are rotated in opposite directions using shift operations for a specific number of iterations.

[0019]After the final rotation, the y coordinate of the second vector has moved to about zero and the x and y coordinates of the first vector correspond to the sine and cosine of the phase offset. The sine and cosine of the phase offset, an offs