WO2025094092 - CODE AND DOPPLER BASED MULTIPATH MITIGATION
National phase entry:
Publication Number
WO/2025/094092
Publication Date
08.05.2025
International Application No.
PCT/IB2024/060727
International Filing Date
30.10.2024
Title **
[English]
CODE AND DOPPLER BASED MULTIPATH MITIGATION
[French]
ATTÉNUATION DE TRAJETS MULTIPLES BASÉE SUR UN CODE ET UN DOPPLER
Applicants **
NEXTNAV FRANCE
Inventors
CHRABIEH, Rabih
LE, Vinh Hoang Son
Priority Data
63/595,954
03.11.2023
US
18/753,895
25.06.2024
US
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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| Number of Office Actions | * |
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International Searching Authority |
EPO
* |
| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
* |
| Applicant's Legal Status |
Legal Entity
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| * | |
| * | |
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2265 | |
| EPO | Filing, Examination, Granting | 10104 | |
| Japan | Filing, Examination, Granting | 2267 | |
| South Korea | Filing, Examination, Granting | 2269 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
21,645
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
A multipath signal is received comprising a PRN code used to determine time of arrival of a signal of interest. A correlated received signal is generated by filtering and correlating of the received multipath signal. Short-term accumulation segments are generated based on the correlated received signal. Doppler hypotheses are applied to each of the short-term accumulation segments to generate phase-corrected short-term accumulated blocks. The phase-corrected short-term accumulated blocks are accumulated to generate long-term accumulated blocks for each Doppler hypothesis. Alternatively, cross-correlation samples are generated for signal samples for each short-term accumulation segment, and the cross-correlation samples are accumulated to generate a long-term accumulated block.[French]
Un signal à trajets multiples est reçu comprenant un code PRN utilisé pour déterminer le temps d'arrivée d'un signal d'intérêt. Un signal reçu corrélé est généré par filtrage et corrélation du signal à trajets multiples reçu. Des segments d'accumulation à court terme sont générés sur la base du signal reçu corrélé. Des hypothèses Doppler sont appliquées à chacun des segments d'accumulation à court terme pour générer des blocs accumulés à court terme à phase corrigée. Les blocs accumulés à court terme à phase corrigée sont accumulés pour générer des blocs accumulés à long terme pour chaque hypothèse Doppler. En variante, des échantillons de corrélation croisée sont générés pour des échantillons de signal pour chaque segment d'accumulation à court terme, et les échantillons de corrélation croisée sont accumulés pour générer un bloc accumulé à long terme.