Satellite Navigation Data Signal Tracking via Pilot Channel Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current satellite navigation systems face limitations in data transmission signal tracking due to the sharing of power between data and pilot channels, which affects the precision and integrity of positioning, especially when augmentation signals are used.
Innovation Solution
A method that transforms the data transmission signal into a pilot channel by transmitting an improvement signal with advanced encoding and interleaving techniques, allowing for better demodulation and tracking without the need for a separate pilot channel, thereby optimizing power allocation and improving signal reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a data channel is used for data transmission without a separate pilot channel, then the system structure is simplified and power is saved, but the tracking performance deteriorates due to incoherent energy accumulation and additional noise
Solution Approach 1:
The patent combines the pilot channel and data channel into a single integrated data transmission signal. The signal contains both pilot symbols (for coherent tracking) and data symbols (for information transmission) within the same channel structure, eliminating the need for separate channels while maintaining both tracking performance and data transmission capability
Solution Approach 2:
The data transmission signal serves dual functions: it acts as both a pilot signal for tracking (through embedded pilot symbols) and a data carrier (through data symbols). This multi-functional design allows the single signal to perform both tracking and data transmission roles that traditionally required separate channels
2Reliability
If power is shared between data channel and pilot channel, then both functions can be performed, but the power available for each individual channel is reduced, limiting tracking capabilities
Solution Approach 1:
By merging the pilot and data channels into a single signal, the patent eliminates power division between separate channels. The total authorized power can be fully allocated to this unified signal, with the power efficiently distributed between pilot symbols and data symbols within the same transmission framework, maximizing the power available for tracking while maintaining data transmission
3Device complexity
If data is transmitted on a data channel without pilot channel support, then the system is simpler, but the accumulation of signal energy must be done incoherently which introduces additional noise and limits tracking
Solution Approach 1:
The patent embeds pilot symbols within the data transmission signal, creating a unified structure where coherent tracking is enabled. The receiver can coherently accumulate energy from both pilot symbols and data symbols by exploiting the known pilot sequence, thereby reducing noise impact and improving tracking performance while maintaining a simplified single-channel structure
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for improving the tracking of a data transmission signal transmitted to a receiver of a satellite navigation system in addition to navigation signals transmitted by the satellites to a satellite positioning receiver, comprising: a step of transmitting (10), to the receiver, during a so-called improvement period TAAi and by means of an improvement signal transmitted in conjunction with said data transmission signal, data Ni or other data Nai enabling the prediction of said data, said data further being transmitted to the receiver by means of the data transmission signal during a transmission period Tai beginning after the end of the improvement period TAAi; a step of receiving (20), by the receiver, said data Ni or said other data Nai which are transmitted by means of the improvement signal; a step of generating symbols (30) to be used for modulating the data transmission signal during said transmission period Tai, by means of said received data Ni or other received data Nai; and a step of tracking (40) the data transmission signal while eliminating the effect of the modulation of said data transmission signal by the generated symbols.