Apparatus and methods for interference cancellation in spread spectrum communication systems

A symbol transmitting the communication medium according to one group of spread spectrum sequences' first spread spectrum sequence, for example, according to be used for transmitting a symbol the system a CDMA channelizing code. The communication signal, a rotator of the mobile terminal from the communication method. Communication signal of receiving a signal to cell special scrambling code Xie Rao body is of a receiving decomposes, wherein multiple signal path ingredients. With the decomposition multiple signal ingredients with a group of spread spectrum serial correlations, so that the number of generating and decomposition the related groups of signal adding each signal component; the related groups and related set and first spread spectrum sequence a decomposition signal adding corresponding relevance. A plurality decompositions' signal component and first spread spectrum sequence's relevance eliminating with the spread spectrum sequence units second spread spectrum sequence associated interference component; the second spread spectrum sequence is externally according to the decomposition signal ingredients and group in spread spectrum sequences', relevance to the generating decomposition signal component and first spread spectrum sequence eliminated interference related set. To eliminating interference related set with appraised for transmitting a symbol. The group of spread spectrum sequences and better is quardratures. Intervals best the group of spread spectrum sequences includes a hada horse code, and group in spread spectrum sequence and decomposition the related of fast hada horse of signal ingredient's converting production.