| 摘要 |
The channel impulse response of a communication channel is determined from measurement of the cross correlation between the channel output signal and a delayed locally generated pseudorandom noise sequence signal. The undelayed pseudorandom noise sequence signal is utilized as a probe signal and is added to any information signal prior to being supplied to the communication channel being monitored. The output of the channel is hard limited and polarity-coincidence compared to the time-delayed pseudorandom noise sequence signal.
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