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1. (WO2019062737) JOINT RECEIVER AND RECEIVING METHOD FOR NAVIGATION SIGNALS LOCATED AT ADJACENT FREQUENCIES



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INTERNATIONAL SEARCH REPORT (ISR)
Part 1:  1  2  3  4  5  6          Part 2:  A  B  C  D  E 
International application No. Applicant's or agent's file reference
PCT/CN2018/107510 18PC00016THU
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
26 September 2018 28 September 2017
Applicant
TSINGHUA UNIVERSITY
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
b.
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
c.
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.

It is provided a joint receiver and receiving method for navigation signals located at adjacent frequencies. The joint receiving method includes: receiving a first navigation signal and a second navigation signal which are located at adjacent frequencies (S1); and calculating a frequency estimation of a virtual wideband navigation signal constructed based on the first navigation signal and the second navigation signal (S2), wherein the virtual wideband navigation signal is an asymmetric BOC-like navigation signal having a virtual carrier and a virtual sub-carrier. With the joint receiver and joint receiving method, not only power gain but also bandwidth gain can be obtained, and the ranging precision can be significantly improved.


6. Drawings
a.
The figure of the drawings to be published with the abstract is Figure No.     1    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
b.
none of the figures is to be published with the abstract.

A. CLASSIFICATION OF SUBJECT MATTER

According to International Patent Classification (IPC) or to both national classification and IPC

B. FIELDS SEARCHED

Minimum documentation searched (classification system followed by classification symbols):
     G01S
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
CNABS, CNTXT, CNKI, VEN, IEEE, Baidu Scholar, USTXT, EPTXT, WOTXT: adjacent, close, frequenc+, joint, cooperat+, receiv+, acqui+, track+, captur+, GPS, GNSS, BD, L2C, L5, B1i, B1C, virtual

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
(1)
PX
WANG, Chuhan et al., "Asymmetric Dual-Band Tracking Technique for Optimal Joint Processing of BDS B1I and B1C Signals.", Sensors.,Vol. 17, No. 10, 16 October 2017 (2017-10-16),
1-23
pages 1-16
(2)
A
US 2014191903 A1 (M3SYSTEMS) 10 July 2014 (2014-07-10)
1-23
the description, paragraphs [0009]-[0064]
(3)
A
CN 104678411 A (胡辉) 03 June 2015 (2015-06-03)
1-23
the whole document
(4)
A
HE, Wenting et al., "Research and Implementation of the Modernized GPS Signal L2C and L5.", 2009 Second International Conference on Computer and Electrical Engineering.,30 December 2009 (2009-12-30),
1-23
pages 412-415
*
Special categories of cited documents:
"A"
document defining the general state of the art which is not considered to be of particular relevance
"E"
earlier application or patent but published on or after the international filing date
"L"
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
"O"
document referring to an oral disclosure, use, exhibition or other means
"P"
document published prior to the international filing date but later than the priority date claimed
"T"
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
"X"
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
"Y"
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
"&"
document member of the same patent family

D. INFORMATION ON PATENT FAMILY MEMBERS

Patent document cited in search report Publication date
(day/month/year)
Patent family member(s) Publication date
(day/month/year)
US 2014191903 A1
10 July 2014
US 9529070 B2
FR 3000806 B1
EP 2755050 B1
ES 2550709 T3
FR 3000806 A1
EP 2755050 A1
27 December 2016
20 February 2015
22 July 2015
11 November 2015
11 July 2014
16 July 2014
CN 104678411 A
03 June 2015
None
Name and mailing address of the ISA/:
National Intellectual Property Administration, PRC
6, Xitucheng Rd., Jimen Bridge, Haidian District, Beijing 100088
China
Facsimile No. (86-10)62019451
Date of the actual completion of the international search:
25 December 2018
Date of mailing of the international search report:
07 January 2019
Authorized officer:
YANG,Shilin
Telephone No. 86-(010)-62085717
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