| 摘要 |
A digital correlation receiver, particularly for satellite communications transmission, wherein the signal channels or bursts, from various ground stations, combined in a time division multiplex (t.d.m.) arrangement and provided with a preamble comprising a synchronizing word, are time-staggered at the satellite end, and, relative to the reference burst which marks the beginning of the frame, are combined to form a frame and retransmitted with time division multiplex access (TDMA); in which a shift register receives the incoming bit flow at the receiving end and comparators are connected to the individual cells of the shift register, and at whose second comparator inputs a logic state exists representing the synchronizing word to which the received word should correspond, the output of the respective comparators being supplied, in respective combinations, to successive groups of adder stages which are interconnected over corresponding stores, with the respective addition results being supplied to an analysis circuit from which the correlation peak is derived. |
