A design of fast searcher for CDMA WLL system

We present a high-speed power-efficient fast searcher module for an initial code acquisition in CDMA wireless local loop (WLL) system. We introduce a double-dwell serial search algorithm with 16 parallel active correlators to meet mean code acquisition time required in WLL system. We pipeline parallel active correlators and make use of a common energy processing element and a microcontroller I/F block. As a result, hardware complexity is reduced to only 1/4 of a conventional searcher consisting of 16 correlators.