Ultra-wideband hopping spread signal rapid capturing method

An ultra-wideband, signal technology, applied in the field of fast capture of ultra-wideband jump-spread signals, can solve the problems of long time and low capture precision, and achieve the effect of fast capture speed and high capture precision

Active Publication Date: 2022-02-15
成都亿凌特科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fast capture method based on an ultra-wideband jump-spread signal, which can solve the problems of low capture accuracy and long time in the prior art

Method used

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  • Ultra-wideband hopping spread signal rapid capturing method
  • Ultra-wideband hopping spread signal rapid capturing method
  • Ultra-wideband hopping spread signal rapid capturing method

Examples

Experimental program
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Embodiment

[0056] A method for fast acquisition of an ultra-wideband hop-spread signal, the realization of which includes the following processes:

[0057] (a) Divide the time uncertainty range into several search units, and the search interval is T h "(single-hop period at the channel's maximum Doppler frequency), that is, the single-hop interval slides.

[0058] (b) Sampling block. Under the code Doppler search, according to the current code Doppler frequency, the cumulative step of counting NCO is calculated to realize half-chip counting and hop counting, and then block the input samples to generate local frequency hopping of the corresponding length frequency etc.

[0059] (c) Frequency Hopping Carrier Stripping. The de-hopping adopts dual-channel down-converter to de-hop alternately. The down-converter is divided into two parts, A and B. A is responsible for de-hopping of frequency hopping bands counted as odd, and B is responsible for even numbers. Each frequency hopping frequen...

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Abstract

The invention discloses an ultra-wideband hopping spread signal rapid capturing method, which can solve the problems of low capturing precision and long capturing time. The invention relates to an ultra-wideband hopping spread signal rapid capturing method, which comprises the following steps of: 1, completing frequency hopping carrier stripping of an input sampling signal through double-path down-conversion alternate de-hopping; 2, completing code stripping through chip sliding correlation operation; and 3, performing coherent accumulation on correlation results in each frequency hopping time period, and then completing multiple times of incoherent accumulation; and comparing the obtained final accumulated peak value with a preset capture judgment threshold value to judge whether capture succeeds. Through the method, the problems in the prior art can be well solved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for quickly capturing an ultra-wideband jump-spread signal. Background technique [0002] Spread hopping signal is a signal system combining frequency hopping spread spectrum and direct sequence spread spectrum. It combines the advantages of both, and has stronger confidentiality and anti-interference ability. It is often used in satellite communication, satellite measurement and control and other fields. [0003] Capture is the key to hop-spread signal processing. Under ultra-wideband channel conditions, the Doppler frequency deviation is relatively large, and there is a certain frequency change rate. Usually, multiple acquisitions are required to achieve the entry conditions for subsequent tracking processing. At the same time, this also affects the speed of single acquisition and the acquisition The accuracy of the time frequency puts forward higher requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7075
CPCH04B1/7075Y02D30/70
Inventor 高珊肖均张建刚张清洪王智宏罗孝杰
Owner 成都亿凌特科技有限公司
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