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A signal ranging system and ranging method combining code division multiple access and multi-subcarrier direct sequence code division multiple access

A code division multiple access and multi-subcarrier technology, applied in the field of ranging system, can solve the problems of ranging error affecting positioning accuracy, and achieve high-precision ranging and superior synchronization performance

Active Publication Date: 2019-06-04
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When implementing positioning services, ranging is often required, and ranging errors affect positioning accuracy

Method used

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  • A signal ranging system and ranging method combining code division multiple access and multi-subcarrier direct sequence code division multiple access
  • A signal ranging system and ranging method combining code division multiple access and multi-subcarrier direct sequence code division multiple access
  • A signal ranging system and ranging method combining code division multiple access and multi-subcarrier direct sequence code division multiple access

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, a signal ranging method combining CDMA and multi-subcarrier direct sequence CDMA provided in this embodiment includes:

[0029] Step S1: The ranging receiving device receives the ranging signal sent by the user equipment. The ranging signal simultaneously carries the CDMA pilot signal for synchronization and the multi-subcarrier direct sequence code division for precision ranging and communication. Multiple access (MC-DS / CDMA) signal;

[0030] The signal structure of the ranging signal constructed in the embodiment of the present invention adopts a signal structure combining code division multiple access and multi-subcarrier direct sequence code division multiple access time division. The signal stru...

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Abstract

The present invention provides a signal ranging system and ranging method combining code division multiple access and multi-subcarrier direct sequence code division multiple access, which uses code division multiple access CDMA pilot signals for synchronization and fine measurement The distance and communication DS / CDMA signal is coupled into one signal for transmission, which can take into account the advantages of CDMA synchronization performance, low sensitivity to frequency offset, high MC-DS / CDMA ranging accuracy and large communication capacity. By receiving multiple access ranging signals combined with multi-subcarrier direct sequence code division multiple access and frequency division multiple access, high-precision ranging is realized.

Description

technical field [0001] The invention relates to the field of communication and positioning, in particular to a ranging system and method combining code division multiple access and multi-subcarrier direct sequence code division multiple access. Background technique [0002] Location-based services have widely entered people's lives and become an indispensable part of economic construction and social life. For example, the current pseudolite positioning system, satellite navigation system, and base station positioning mode based on mobile communication systems. When implementing positioning services, ranging is often required, and ranging errors affect positioning accuracy. Therefore, how to reduce the ranging error to improve the positioning accuracy is a problem that needs to be solved at present. Contents of the invention [0003] In view of the technical problems existing in the prior art, the object of the present invention is to provide a signal ranging system and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04W64/00G01S11/02
CPCG01S11/02H04L5/0016H04L5/0048H04W64/006
Inventor 王飞雪黄新明朱祥维李井源陈华明刘增军龚航王勇唐小妹肖志斌刘瀛翔李垣陵
Owner NAT UNIV OF DEFENSE TECH