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Unambiguous reception method of tmboc signal with time-division multiplexed double-reference waveform

A time-division multiplexing and receiving method technology, applied in the field of pseudo-code tracking of satellite navigation receivers, can solve the problems of large positioning deviation, tracking performance degradation, false locking, etc., to achieve suppression of medium and long-distance delays, excellent pseudo-code tracking performance, The effect of excellent anti-multipath performance

Active Publication Date: 2017-07-25
湖南中电星河电子有限公司
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Problems solved by technology

Due to the existence of sidelobes in the autocorrelation function of the TMBOC signal, when the code-related reference waveform technology is transplanted to the TMBOC signal, the pseudo-code phase discrimination function has a wrong lock point, and the pseudo-code may be mistakenly locked to the wrong lock point when tracking the pseudo-code. There is a large deviation in positioning, which directly affects the positioning performance of the satellite navigation receiver
In addition, when the code-related reference waveform technology is applied to the TMBOC signal, the BOC (6,1) component in the signal is not fully utilized, and the tracking performance is reduced

Method used

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  • Unambiguous reception method of tmboc signal with time-division multiplexed double-reference waveform
  • Unambiguous reception method of tmboc signal with time-division multiplexed double-reference waveform
  • Unambiguous reception method of tmboc signal with time-division multiplexed double-reference waveform

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but this does not constitute a limitation of the present invention.

[0032] Such as Figure 1 to Figure 8 As shown, the TMBOC signal unambiguous receiving method based on the time division multiplexing double reference waveform of the present embodiment comprises the following steps:

[0033] Step S1: Phase rotate and split the received satellite navigation signal to obtain two orthogonal signals respectively z i ( t )and z q ( t );

[0034] Step S2: The local replica signal generator generates a local replica signal according to the pseudo-code phase information obtained by the pseudo-code phase detector X ( t ), X ( t ) respectively with z i ( t )and z q ( t ) correlation, accumulation, get I P and Q P , the calculation formula is

[0035]

[0036] The value of T is generally selected as 1ms;

[0037] Two reference wa...

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Abstract

The invention discloses a TMBOC signal non-fuzzy reception method for two time division multiplexing reference wave shapes. The method includes the following steps: S1, performing phase rotation and shunting on a received satellite navigation signal, obtaining Zi (t) and Zq (t), generating a local copy signal X (t) according to pseudo-code phase information, and associating the X (t) with the Zi (t) and the Zq (t) and accumulating the X (t),the Zi (t) and the Zq (t) to obtain Ip and Qp; S2, generating a reference wave shape signal W (t) according to the pseudo-code phase information, and associating the W (t) with the Zi (t) and the Zq (t) and accumulating the W (t),the Zi (t) and the Zq (t) to obtain Iw and Qw; S3, obtaining a pseudo-code phase demodulation function through the Ip, Qp, Iw and Qw that are obtained in the step S2 by means of a formula (d=IpIw+QpQw); and S4, performing the step S2 to the step S3 in a cyclic manner to achieve TMBOC signal tracking. According to the method, wrong lock points of the pseudo-code phase demodulation function are eliminated, a BOC (6, 1) component is utilized, and the tracking precision is improved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a pseudocode tracking method for a satellite navigation receiver receiving GPS system TMBOC signals. Background technique [0002] The GPS system broadcasts the TMBOC signal at the L1C frequency point, which is generated by the time division multiplexing of the BOC(1,1) and BOC(6,1) signals, and is separated from the BPSK signal in the spectrum, which can improve the spectrum utilization. Multipath is caused by the satellite direct signal entering the receiver antenna through the reflection of surrounding objects. Since it is difficult to eliminate by establishing mathematical models and differential methods, multipath has become one of the main error sources of current satellite navigation system positioning. When traditional BPSK signals are received, code-related reference waveform technology is generally used to eliminate multipath errors. The code correlation r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/44
CPCG01S19/21G01S19/22G01S19/29G01S19/30G01S19/44
Inventor 刘哲唐小妹倪少杰李峥嵘黄龙庞晶刘瀛翔肖志斌张勇虎
Owner 湖南中电星河电子有限公司
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