| 摘要 |
A mobile station is provided for receiving a spread spectrum, code division transmission from at least one transmitter, such as a base station. The mobile station contains a receiver for outputting data samples, and further contains a multi-tap ring matched filter. The ring matched filter is constructed to have first circuitry for storing an individual one of a received data sample into an individual one of a plurality storage registers such that a active data sample that has been stored for the longest period of time is overwritten with a most recently received data sample. The ring matched filter is further constructed to have second circuitry for serially shifting coefficient bits of at least one multi-bit spreading code relative to the storage registers for sequentially and simultaneously correlating the at least one multi-bit spreading code with a plurality of corresponding stored data samples, while significantly reducing power consumption by limiting state changes of flip-flops. |
