Patent ID: 7711038
Filing Date: 2010-05-04
Classification: H04B,H04L

Abstract:
1. A system for despreading a spread spectrum signal using a pseudo-noise (“PN”) code, wherein the spread spectrum signal comprises a plurality of signal samples, each signal sample having an in-phase portion and a quadrature-phase portion, and wherein the PN code comprises a plurality of PN code chips, the system comprising: a switch for selecting one of the in-phase portion and the quadrature-phase portion of a first signal sample of the plurality of signal samples; a first multiplier coupled to the switch for multiplying the selected portion of the first signal sample with a first PN code chip of the plurality of PN code chips to obtain a first product, where the selected portion of the signal sample is first provided to an odd-even switch and is either an even portion or an odd portion of the selected portion of the first signal sample; a second multiplier coupled to a switch for multiplying a selected portion of a second signal sample of the plurality of signal samples with the first PN code chip to obtain a second product, wherein the second signal sample succeeds the first signal sample, where the selected portion of the second signal sample is first provided to the odd-even switch and is either an even portion or an odd portion of the selected portion of the second signal sample; and a first adder coupled to the first multiplier and the second multiplier for adding the first product with the second product to obtain a first sum.