| 摘要 |
PURPOSE: To reduce a synchronization acquisition time in a base station in the code-division multiple address equipment. CONSTITUTION: A base station transmitter side spread modulation circuit applies spread modulation by multiplying a PN code S1 generated from a PN code generator 1 with pilot signal data D1 and user data D2, D3 at multipliers 2, 3, 4 and an adder 5 sums the results of multiplication to obtain a transmission signal S5. A frame detector 6 detects a PN code as a head of a frame of the transmission signal S5 when the PN code of a PN address 0 is sent from the PN code generator 1. A base station resets synchronization acquisition with a head timing of the frame of the transmission signal S5 to reduce the synchronization acquisition time. |
