Patent ID: 7352796
Filing Date: 2008-04-01
Classification: H04J

Abstract:
1. A method for generating and applying N hybrid Walsh complex orthogonal codes for code division multiple access (CDMA), said method comprising the steps: generating N Walsh codes W(c) with code index c=0, 1, 2, . . . , N−1, each with N chips where N is a power of 2, generating said N hybrid Walsh codes {tilde over (W)} (c) by reordering each of said N Walsh codes into a corresponding real component and a corresponding imaginary component of a hybrid Walsh code as defined by equations wherein said N hybrid Walsh codes are generated by reading the N Walsh codes chip values from a Walsh code memory in a digital signal processor and writing the reordered Walsh codes to a hybrid Walsh code memory, applying said N hybrid Walsh codes in an encoder and in a decoder of a CDMA system by encoding transmitting data and decoding receiving data with said N hybrid Walsh complex codes, and transmitting data encoded by the encoder and receiving data decoded by the decoder.