A method for synchronizing an incoming data signal with a local timing signal asynchronous available in a re-ceptor.

摘要

PCT No. PCT/SE81/00075 Sec. 371 Date Oct. 23, 1981 Sec. 102(e) Date Oct. 23, 1981 PCT Filed Mar. 10, 1981 PCT Pub. No. WO81/02654 PCT Pub. Date Sep. 17, 1981.A method and apparatus in a receiver for data signals for correctly detecting a transmitted message with the aid of a local clock signal which is asynchronous in relation to the received data signal. A condition hereby is that the addition of fall-away of sporadic binary characters in the message do not have any effect. This condition is met in a redundant system, for example, in which the same message of a fixed number of bits is sent repeatedly in sequence and the receiver accepts the message providing it detects the same message a given number of times during a given time. According to the method, the incoming data signal (A) is first clocked with a phase-corrected clock signal (F) and thereafter once again with the uncorrected clock signal (B).