CN104898133B - Anti-multipath method of reseptance applied to bpsk signal - Google Patents

Anti-multipath method of reseptance applied to bpsk signal Download PDF

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Publication number
CN104898133B
CN104898133B CN201510298073.8A CN201510298073A CN104898133B CN 104898133 B CN104898133 B CN 104898133B CN 201510298073 A CN201510298073 A CN 201510298073A CN 104898133 B CN104898133 B CN 104898133B
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pseudo
signal
code phase
code
generally rectangular
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CN104898133A (en
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李柏渝
刘哲
牟卫华
黄龙
张勇虎
李彩华
倪少杰
唐小妹
李峥嵘
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Hunan Zhongdian Xinghe Electronics Co ltd
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National University of Defense Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/22—Multipath-related issues
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The present invention discloses a kind of anti-multipath method of reseptance applied to bpsk signal, comprising the following steps: by the satellite navigation signals received are phase-rotated and branch, respectively obtainsz i (t) andz q (t), local replica signal is generated according to pseudo-code phase informationX(t),X(t) respectively withz i (t) andz q (t) related, cumulative, it obtainsI P WithQ P ；Reference waveform signal is generated according to pseudo-code phase informationW(t),W(t) basic waveform signal by 3 generally rectangular wave components, preceding 2 generally rectangular wave amplitudes are 1, and width is Δ1, the 3rd generally rectangular wave width is Δ2, amplitude is-Δ1/Δ2。W(t) respectively withz i (t) andz q (t) related, cumulative, it obtainsI W WithQ W ；S3: according to obtained in step S2I P 、Q P 、I W 、Q W , pass through formulad(ε)=I P (ε)I W (ε)+Q P (ε)Q W (ε) obtains pseudo-code phase demodulation function；S4: circulation carries out step S2 to S3, realizes the tracking process of bpsk signal pseudo-code.Method of the invention can obtain anti-multipath performance more better than W2 waveform.

Description

Anti-multipath method of reseptance applied to bpsk signal
Technical field
The present invention relates to technical field of satellite navigation, in particular to a kind of nothing applied to bpsk signal obscures anti-multipath and connects Receiving method.
Background technique
Multipath be satellite direct signal by surrounding objects be reflected into receiver antenna caused by, due to being difficult to pass through Founding mathematical models, poor grading mode are eliminated, and multipath has become one of the main error source of current satellite navigation system positioning, are made At error up to meter level, directly affect the positioning accuracy of satellite navigation system.Satellite navigation receiver generally uses code at present Coherent reference waveform technology eliminates multipath error.Code coherent reference waveform technology is by being locally generated a series of reference wave Shape constructs ideal pseudo-code phase demodulation function.Traditional reference waveform includes W2 waveform, W3 waveform, W4 waveform etc., energy Enough multipath signals for effectively inhibiting medium and long distance delay, but in terms of multipaths restraint, still have with optimal pseudo-code phase demodulation function larger Gap.
Summary of the invention
The purpose of the present invention is being directed to the deficiency of above-mentioned prior art, propose that a kind of anti-multipath for bpsk signal receives Method.The present invention designs a kind of new reference waveform, compared with traditional reference waveform, the phase demodulation function of the waveform construction out There is better anti-multipath performance.
The technical scheme is that
A kind of anti-multipath method of reseptance applied to bpsk signal, comprising the following steps:
S1: by the satellite navigation signals received are phase-rotated and branch, the orthogonal signal of two-way is respectively obtainedz i (t) Withz q (t)；
S2: replica signal is locally generated in receiver according to pseudo-code phase informationX(t),X(t) respectively withz i (t) andz q (t) It is related, cumulative, it obtainsI P WithQ P , its calculation formula is:
Wherein T is integral accumulation interval (similarly hereinafter), and ε is time delay (similarly hereinafter)；
Reference signal is generated according to pseudo-code phase informationW(t).The waveform signal is by 3 generally rectangular wave components, and first 2 Generally rectangular wave amplitude is 1, and width is Δ1, the 3rd generally rectangular wave width is Δ2, amplitude is-Δ1/Δ2, such as attached drawing Shown in 2.W(t) respectively withz i (t) andz q (t) related, cumulative, it obtainsI W WithQ W , its calculation formula is:
；
S3: according to obtained in step S2I P 、Q P 、I W 、Q W , pseudo-code phase demodulation function, calculation formula are obtained by following formula Are as follows:
d(ε) = I P (ε)I W (ε) + Q P (ε)Q W (ε)；
S4: circulation carries out step S2 to S3, realizes the tracking process of bpsk signal pseudo-code.
As a further improvement of the present invention, in step s 2, the pseudo-code phase information is obtained by code phase discriminator.
As a further improvement of the present invention, in step S2, the reference waveform signalW(t) mould generated by reference waveform Root tuber is generated according to pseudo-code phase information, and 3 generally rectangular wave widths for forming reference waveform are adjustable.
As a further improvement of the present invention, in step S2, the value of T is adjustable, representative value 1ms.
Compared with prior art, the advantageous effect of present invention is that:
The present invention constructs the pseudo-code phase demodulation function of anti-multipath function admirable by a kind of new reference waveform signal, when Generally rectangular wave width meets Δ1/Δ2When > 1, anti-multipath performance is better than traditional reference waveform.
Detailed description of the invention
Fig. 1 is the functional block diagram of the method for the present invention.The same phase and reverse phase that received signal is generated with local carrier NCO module Carrier signal be multiplied, obtain removing carrier wave after baseband signal, baseband signal respectively with local bpsk signal and local reference wave Shape signal carries out related, integral, adds up, and obtained result is sent to pseudo- code phase discriminator and carrier phase discriminator.Pseudo- code phase discriminator Pseudo-code phase and carrier phase are calculated according to the accumulation result of input with carrier phase discriminator.Local carrier NCO module according to Carrier phase generates new carrier signal, removes for carrier wave.Local puppet code generator generates new local according to pseudo-code phase Replica signal, reference waveform generator generate new reference waveform signal according to pseudo-code phase.
Fig. 2 is the basic composition waveform graph of reference waveform signal proposed by the present invention.Basic waveform signal is basic by 3 Rectangle wave component, preceding 2 generally rectangular wave amplitudes are 1, and width is Δ1, the 3rd generally rectangular wave width is Δ2, amplitude For-Δ1/Δ2。
Fig. 3 is the reference waveform schematic diagram generated according to one section of spreading code.Basic reference waveform produces at code chip edge Raw, symbol is consistent with the symbol of chip where its right part.
Fig. 4 is Δ in bpsk signal1For 0.25 chip width, Δ2For 0.125 chip width, front end bandwidth is When 16.368MHz, pseudo-code phase demodulation functional digraph of the invention.
Fig. 5 is Δ of the present invention in bpsk signal1For 0.25 chip width, Δ2For 0.125 chip width, W2 waveform Width is 1 chip width, and narrow relevant morning-uses 0.5 chip width, multipath when front end bandwidth is 16.368MHz late Error envelope comparison diagram.
Fig. 6 is Δ of the present invention in bpsk signal1For 0.25 chip width, Δ2For 0.125 chip width, W2 waveform Width is 0.5 chip width, and time of integration T is 1ms, and track loop bandwidth is 1Hz, and front end filter bandwidth is Pseudo-code tracing error variance comparison diagram when 16.368MHz.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with attached drawing, but are not construed as limiting the invention.
As shown in Figures 1 to 6, the nothing for being applied to bpsk signal of the present embodiment obscures reference waveform method of reseptance, including Following steps:
Step S1: by received satellite navigation signals are phase-rotated and branch, the orthogonal signal of two-way is respectively obtainedz i (t) andz q (t)；
Step S2: local puppet code generator generates local replica signal according to the pseudo-code phase information that pseudo- code phase discriminator obtainsX(t),X(t) respectively withz i (t) andz q (t) related, cumulative, it obtainsI P WithQ P , calculation formula is
Wherein the numerical value of T is generally chosen for 1ms；
Local reference waveform generation module generates reference waveform signal according to the pseudo-code phase information that pseudo- code phase discriminator obtainsW (t).Basic reference waveform signal generates at the code chip edge of each spreading code.W(t) respectively withz i (t) andz q (t) related, tired Add, obtainsI W WithQ W , calculation formula is
Step S3: according in step S2I P 、Q P 、I W 、Q W Obtain pseudo-code phase demodulation function, calculation formula are as follows:
d(ε) = I P (ε)I W (ε) + Q P (ε)Q W (ε)
Circulation carries out step S2 and step S3, realizes the tracking process of bpsk signal.
Although the above is the complete description to specific embodiments of the present invention, can take various modifications, variant and Alternative.These equivalent programs and alternative are included within the scope of the disclosure.Therefore, the scope of the present invention should not It is limited to described embodiment, but should be defined by the appended claims.

Claims (3)

1. a kind of anti-multipath method of reseptance applied to bpsk signal, which comprises the following steps:
S1: by the satellite navigation signals received are phase-rotated and branch, the orthogonal signal z of two-way is respectively obtainedi(t) and zq (t)；
S2: according to pseudo-code phase information receiver locally generate replica signal X (t), X (t) respectively with zi(t) and zq(t) phase It closes, is cumulative, obtaining IPAnd QP, its calculation formula is:
Wherein T is integral accumulation interval, and ε is time delay；
Reference waveform signal W (t) locally is generated in receiver according to pseudo-code phase information, the waveform signal is generally rectangular by 3 Wave component, preceding 2 generally rectangular wave amplitudes are 1, and width is Δ1, the 3rd generally rectangular wave width is Δ2, amplitude be- Δ1/Δ2, Δ1/Δ2>1；W (t) respectively with zi(t) and zq(t) related, cumulative, obtain IWAnd QW, its calculation formula is:
S3: according to I obtained in step S2P、QP、IW、QW, pseudo-code phase demodulation function, calculation formula are obtained by following formula are as follows:
D (ε)=IP(ε)IW(ε)+QP(ε)QW(ε)；
IP、QPIt is tracked for carrier wave ring；
S4: circulation carries out step S2 to S3, realizes the tracking process of bpsk signal pseudo-code.
2. the anti-multipath method of reseptance according to claim 1 applied to bpsk signal, which is characterized in that in step S2 In, the pseudo-code phase information is obtained by code phase discriminator.
3. the anti-multipath method of reseptance according to claim 1 or 2 applied to bpsk signal, which is characterized in that step S2 In, T value is adjustable, typical value 1ms.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010082635A1 (en) * 2009-01-15 2010-07-22 古野電気株式会社 Code correlator, positioning device, code correlation method, code correlation program, positioning method, and positioning program
CN102338878A (en) * 2011-07-19 2012-02-01 电子科技大学 Novel multi-path inhibition BOC (Binary Offset Carrier) code tracking method and code tracking ring
CN102540218A (en) * 2010-12-31 2012-07-04 和芯星通科技(北京)有限公司 Correlator for global positioning satellite navigation signal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010082635A1 (en) * 2009-01-15 2010-07-22 古野電気株式会社 Code correlator, positioning device, code correlation method, code correlation program, positioning method, and positioning program
CN102540218A (en) * 2010-12-31 2012-07-04 和芯星通科技(北京)有限公司 Correlator for global positioning satellite navigation signal
CN102338878A (en) * 2011-07-19 2012-02-01 电子科技大学 Novel multi-path inhibition BOC (Binary Offset Carrier) code tracking method and code tracking ring

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CCRW技术在MBOC调制信号下多径抑制性能;刘哲 等;《全球定位系统》;20110831;第36卷(第4期);第29-33页 *
码相关参考波形技术在BOC信号接收中的多径抑制性能研究;刘荟萃 等;《中国科学：物理学 力学 天文学》;20100531;第40卷(第5期);第581-591页 *

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