Code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system

摘要

Disclosed is a code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system. Through the steps of calculating fast path energy on a first path signal by removing an interference signal component from the first path signal, the first path signal being faster than an allocated multi-path signal, calculating slow path energy on a second path signal by removing an interference signal component from the second path signal, the second path signal being slower than the allocated multi-path signal, obtaining information regarding timing of the allocated multi-path signal by using the fast path energy and the slow path energy, and receiving the allocated multi-path signal based on the obtained timing information, it is possible to prevent an occurrence of a fat finger phenomenon in which fingers de-modulating multi-path signals having mutually different time delays track the same path, so that it is possible to obtain a time diversity effect, thereby enhancing the reception of a rake receiver.