Delay performance test method and test device for fractional delay filter

Abstract

The invention discloses a delay performance test method and a test device for a fractional delay filter. The delay performance test method comprises the following steps: providing two test signals between which a delay precision value exists; respectively transmitting the two test signals into two fractional delay filters to be tested with delay values respectively set to be zero and equal to the delay precision value, to form two output signals; comparing the two output signals; subtracting the two output signals, and judging and estimating the delay performance of the fractional delay filters to be tested according to a difference, or estimating the delay performance by implementing a relevant function method on the two output signals; changing the delay value into an integral multiple of the delay precision value or change frequency values of the two test signals, and repeating the above steps. The invention further discloses a delay performance test device for the fractional delay filter by adopting the method, another delay performance test method for the fractional delay filter and a delay performance test device for the fractional delay filter by adopting the another delay performance test method.

Description

technical field [0001] The invention belongs to a delay performance testing method in the field of digital signal processing and a delay performance testing device using the delay performance testing method, in particular to a fractional delay filter delay performance testing method and the application of the fractional delay The invention discloses a fractional delay filter delay performance test device of a filter delay performance test method. Background technique [0002] Phased array radar has agile beam scanning and agility capabilities, and can achieve the advantages of multi-target acquisition and tracking. Broadband signals can effectively improve the anti-jamming ability of phased array radar, and can achieve higher ranging accuracy and resolution, which is conducive to imaging, identification and classification of targets. Therefore, broadband phased array radar technology is one of the main directions of modern radar technology development. [0003] In an array...

AI Technical Summary

Problems solved by technology

[0003] In an array radar system, due to differences in cables, analog and digital devices, and other components, the delay of broadband signals passing through multiple analog channels is different. The traditional phase control method will cause the pointing deviation of the receiving beam and the The scanning is not accurate, and the real time delay line needs to be used instead of the phase shifter

However, the analog delay line has disadvantages such as high cost, large volume, high power consumption, and poor stability, which restrict its application in array radar.

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