Device and method for processing tracking loop error in positioning receiver

Abstract

The embodiment of the present invention provides a tracking loop error processing device and method in a positioning receiver, wherein the device includes: a discriminator, a first judger, a second judger, a position velocity time PVT calculation circuit, and a vector tracking correction devices, loop filters, etc. Determine whether the tracking error exceeds the error threshold value by the timing of each interval of the first decision device, if yes, do not use the PVT solution in the position velocity time PVT solution circuit, and directly give the tracking error to the loop filter, if not , the tracking error is corrected based on the PVT solving circuit; and, through the second decision device, it is judged whether the corrected error exceeds the error threshold value, if yes, the tracking error is directly used as the input of the loop filter, if not, then The corrected error is used as the input of the loop filter. In this way, by using the first decision unit and the second decision unit, the accumulation of tracking errors can be avoided, and the reliability of the tracking loop can be improved.

Description

technical field [0001] The invention relates to the field of communication technologies, in particular to a processing device and method for tracking loop errors in a positioning receiver. Background technique [0002] Facing complex indoor environments, an indoor Time Code Division-Orthogonal Frequency Division Multiplexing (TC-OFDM for short) positioning system has certain advantages over other indoor positioning technologies. [0003] The main realization idea of ​​the general TC-OFDM positioning system is: track the error between the local signal and the digital intermediate frequency signal of the positioning receiver through the tracking loop, and correct the error between the local signal and the digital intermediate frequency signal of the positioning receiver, so that The local signal is aligned with the digital intermediate frequency signal of the positioning receiver, so that the digital intermediate frequency signal in the received signal can be stripped in the t...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the embodiments of the present invention is to provide a tracking loop error processing device and method in a positioning receiver to solve the technical problem that the tracking error of the tracking loop in the prior art will continue to accumulate, resulting in the loss of lock of the tracking loop

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