Method and apparatus utilizing time-expanded pulse sequences for distance measurement in a radar

摘要: Pulse sequences from a radar receiver respectively made up of successive start pulses and echo one or more targets are expanded in time by multiplication with an auxiliary pulse sequence differing slightly repetition rate the sequence. This enables circuits to be used lower degree resolution that would otherwise needed, at cost proportionally reducing number individual measurements target distance, which is no substantial consequence anti-collision where closing rates small compared rate. A time-expanded reference similarly produced oscillator controlling order make independent signal propagation times within these circuits. The evaluated differentiated null passage instant find maximum amplitude determine should disregarded on basis discrimination. range gate controlled velocity vehicle mounted, combination certain other factors, exclude interference irrevalent targets.