Long-distance pulse compression and short-distance pulse envelope detection delay measurement combined distance measuring method

A pulse compression and pulse envelope technology, which is applied in the field of long-distance pulse compression and short-range pulse envelope detection delay measurement combined with ranging, can solve problems such as difficulty, real-time impact of the system, and increased hardware complexity. Achieve the effect of improving ranging accuracy, simple implementation and high real-time performance
CN102778677AInactive Publication Date: 2012-11-14SHANGHAI RADIO EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI RADIO EQUIP RES INST
Publication Date
2012-11-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a long-distance pulse compression and short-distance pulse envelope detection delay measurement combined distance measuring method. The method comprises the following steps of during long-distance range measurement, measuring a distance by adopting the conventional pulse compression method, wherein a selected signal bandwidth can meet the requirement of the long-distance distance measuring accuracy; and during short-distance measurement, extracting linear frequency modulated signal envelope by adopting an envelope detection method after switching a received echo signal to a medium frequency through down-conversion in a receiver, finding a delay point on a detection envelop front edge by adopting a constant-ratio time point discriminant approach, so as to generate a delay pulse, and comparing differential delay between the delay pulse and a transmission detection pulse signal to obtain high-accuracy target distance information. According to the method, the distance measuring accuracy is increased effectively.
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Description

technical field

[0001] The present invention relates to a microwave radar high-precision ranging method, in particular to a distance measuring method combined with long-distance pulse compression and short-distance pulse envelope detection delay measurement, which can be used for ground-based radar, vehicle-mounted radar, ship-borne Radar, spaceborne radar and other microwave radar signal processing that require ranging. Background technique

[0002] With the development of modern electronic warfare and information warfare, higher and higher requirements are put forward for microwave radar performance indicators such as operating range, resolution and measurement accuracy. In order to improve the detection ability of the radar system and increase the operating distance, it can only be achieved by increasing the time width of the transmitted pulse when the peak power of the system equipment is limited. The distance resolution of the radar depends on the bandwidth of the sign...

Claims

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