| 摘要 |
Each spread processing circuit (5) of a dual transmission spread processing circuits (1a,1b) is divided into two sections: an operating system (5N) and a standby system (5E). Spread signals processed by the operating system (5N) and the standby system (5E) are addition synthesized by a first addition synthesis section (7a) and a second addition synthesis section (7b) separately from each other. An addition selection section (8b) for selecting whether or not operating system spread signals and standby system spread signals should be addition synthesized is provided in each of the transmission spread processing circuits (1a,1b). The addition selection section (8b) is directly controlled with a failure detection signal from a failure detection section (10) of the other one of the dual transmission spread processing circuits (1a,1b). <IMAGE> |
