Patent ID: 7545895

Claim:
A method for slot synchronization for an initial cell search, using finite impulse response (FIR) filters, the method comprising: receiving an I signal and a Q signal at synchronization hardware of user equipment; calculating first I results and first Q results by FIR filtering the I and Q signals, respectively; obtaining I and Q sign bits from the first I and Q results; calculating second I results and second Q results by respectively FIR filtering the I and Q signals using the I and Q sign bits, respectively; processing the second I results and the second Q results using an algorithm, thereby providing accumulated results; storing the accumulated results from the algorithm in a memory location, successively processing successive FIR filtered second I results and successive FIR filtered second Q results according to the algorithm, over the same location in different slots to obtain successive accumulated results and storing the successive accumulated results in the memory location; and reading the successive accumulated results from the memory location with a physical-layer processor and searching for a peak location which corresponds to an actual slot boundary.