| 摘要 |
<p>An adaptive, fail-soft digital filterbank for digitised Doppler-modulated video signals. A plurality of modules (12) are controlled by the impulse filter weighting technique to each respond to a set of discrete Doppler frequencies. A built-in test feature is included, the module inputs being multiplexed between system digitised video and synthetic signals to continuously confirm proper operation. Module failures are recognised by the control (programming) circuitry (14) and spare modules can be activated. Control and communications link circuitry is constructed with multiple redundancy.</p> |
