Estimation of Navigation Signal Carrier Phase in Multipath Environment
- Resource Type
- Conference
- Authors
- Fridman, Alexander
- Source
- 2018 IEEE East-West Design & Test Symposium (EWDTS) East-West Design & Test Symposium (EWDTS), 2018 IEEE. :1-6 Sep, 2018
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Robotics and Control Systems
Signal Processing and Analysis
Transportation
Delays
Correlation
Clocks
Maximum likelihood estimation
Correlators
Distance measurement
Navigation
- Language
- ISSN
- 2472-761X
A technique for phase estimation of the navigation signal against the background of multipath signals is proposed. it is based on approximation of the received signal mix in the form of sum of components which delays constitute a discrete set in the delay domain. Maximum Likelihood estimates of the component's complex amplitudes are unbiased, and the phase of the first significant complex component with minimum delay is the required phase estimate. Its noisy variation can be improved by conventional tracking loops. Calculation results demonstrate that the phase estimate remains unbiased even when the true signal delay does not exactly coincide with any of the discrete points, given the additional delay of the nearest multipath signal is equal or exceeds the delay discretization step.