| 摘要 |
PROBLEM TO BE SOLVED: To obtain a spread spectrum communication equipment capable of reducing battery consumption by quickly matching the phases of spread codes by a small operation quantity. SOLUTION: A 4-bit linear code is generated by shift registers R3 to R0, parameters g3 to g0 and an EXOR circuit (XOR) E1. The generated linear code is applied to OR operation with each of masks M3 to M0 corresponding to a required phase by AND circuits (AND) A23 to A20, the exclusive OR operation of these OR results is found out by an XOR E2 and the exclusive OR result is inputted to each of shift registers R3 to R0 and stored in these registers R3 to R0. Thus the phases of linear codes stored in each of the shift registers R3 to R0 are controlled by repeatedly executing the operation described above in accordance with desired phase. |
