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A Pseudorange Measurement Scheme Based on Snapshot for Base Station Positioning Receivers
Jun Mo1, Zhongliang Deng2, Buyun Jia3
1School of Electronic Engineering, Beijing University of Posts and Telecommunications, No. 10 Xitucheng Road, Haidian District, Beijing 100876, China. mojun@bupt.edu.cn.
Sensors (Basel, Switzerland)
|December 2, 2017
Summary
Modified China Mobile Multimedia Broadcasting (CMMB) signals enable meter-level positioning. A novel snapshot-based pseudorange measurement scheme improves Time Difference of Arrival (TDOA) estimation accuracy for wireless positioning systems.
Area of Science:
- Wireless Communication
- Signal Processing
- Geospatial Positioning
Background:
- Digital multimedia broadcasting signals offer potential for wireless positioning.
- Existing China Mobile Multimedia Broadcasting (CMMB) signals lack meter-level positioning capability.
Purpose of the Study:
- To modify the CMMB system for meter-level positioning.
- To develop an accurate Time Difference of Arrival (TDOA) estimation method for base station receivers.
Main Methods:
- Multiplexing CMMB signals with pseudocodes in the same frequency band.
- Implementing a snapshot-based pseudorange measurement scheme.
- Utilizing Taylor expansion of the autocorrelation function for TDOA estimation.
Main Results:
- The modified CMMB system achieves meter positioning accuracy.
- The proposed algorithm significantly reduces TDOA estimation error.
- The snapshot method overcomes challenges of fading channels and limited bandwidth.
Conclusions:
- The modified CMMB system with the proposed TDOA estimation scheme provides accurate meter-level wireless positioning.
- This approach enhances the utility of multimedia broadcasting signals for precise location services.
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