Patent ID: 8594513

Claim:
A time delay adjustment device, comprising: a first signal inserter, configured to receive a first signal, and insert a scrambling signal into the first signal; a first delayer, configured to delay the signal processed by the first signal inserter; a first power splitter, configured to extract a part of signal from the signal delayed by the first delayer; a first filter, configured to filter the signal extracted by the first power splitter, and output the scrambling signal inserted by the first signal inserter; a second signal inserter, configured to receive a second signal, and insert a scrambling signal into the second signal, wherein the inserted scrambling signal is the same as that inserted by the first signal inserter; a second power splitter, configured to extract a part of signal from the signal output by the second signal inserter; a second filter, configured to filter the signal extracted by the second power splitter, and output the scrambling signal inserted by the second signal inserter; and a controller, configured to receive signals sent by the first filter and the second filter, detect a delay difference between the two signals according to a difference between the two signals, and change the delay difference between the two signals by adjusting a delay of the first delayer.