CODE TRACKING APPARATUS FOR MULTIPATH FADING MITIGATION AND METHOD FOR CODE TRACKING USING THE SAME

摘要

The invention and fix the time difference Early- correlator and correlator with Late- 1 ~ 2 chip, output By keeping track of the minimum point of the car, even when the multi-path interference signal that causes the position estimation error is present in various code phase tracking precision and tracking speed, and to improve the tracking area code tracking and multipath error removal for him relates to a code tracking method. ; in the code-tracking device is the code tracking device for the removal of multi-path errors in the invention for this purpose, the code generator, the output signal of the code generator is a variable delay first variable delay group to be controlled, to obtain fast (Early) correlation value (E) of the received signal and the signal output from the code generator, the output from the code generator fast (Early) 1 ~ 2 Late the chip later than the signal obtain signal correlation value (L) of the received signal to both of the calculated difference (EmL) to output Early-Late correlator, and the lowest point tracker to converge to the Early-Late correlator output (EmL) to a minimum value, the second group comprises a variable delay which controls the synchronization of the code generator to exactly match in accordance with an output signal of the tracking error corrector, and the tracking error compensator for compensating for a constant delay with respect to the minimum point that is output from the minimum point tracker.