Low power consumption GPS tracking method and device

Abstract

The invention relates to a GPS receiver and particularly discloses a low power consumption GPS tracking method and a device thereof. The method comprises the steps: (1) after entering into a long coherent integration tracking stage, in a time interval adjusted by each tracking loop of long coherent integration, judging whether GPS signal intensity is larger than a preset threshold low threshold and smaller than a preset threshold high threshold or not, and if so, starting a low power consumption mode and controlling the accumulation process of the long coherent integration to be started / closed intermittently; (2) if not, shutting down the low power consumption mode, and carrying out the accumulation process of the long coherent integration according to a convention model. The device comprises an integral mode control unit which is connected between the GPS signal detection unit and a long coherent integrator and is used for outputting a low power consumption mode opening / closing signal according to the GPS signal intensity so as to control the long coherent integrator to intermittently start / close the accumulation process of the long coherent integration in the low power consumption mode and carry out the accumulation process of long coherent integration normally in the conventional mode. According to the method and the device, the intermittent integration is carried out when the signal is strong, and the reduction of power consumption is facilitated.

Description

technical field [0001] The invention relates to a GPS receiver, in particular to a low power consumption GPS tracking method and device. Background technique [0002] The navigation and positioning signals sent by GPS satellites are an information resource that can be shared by countless users. For the vast number of users on land, sea and space, as long as users have receiving equipment capable of receiving, tracking, transforming and measuring GPS signals, that is, GPS signal receivers, they can use GPS signals for navigation and positioning measurements at any time. At present, there are many manufacturers producing GPS receivers in the world. Not only are there various types of products, but also the competition is becoming more and more fierce. Obviously, only high-performance products are more competitive. [0003] As we all know, low carbon has become a fashion symbol. In the electronic market, people pay more and more attention to the power consumption of electroni...

AI Technical Summary

Problems solved by technology

The calculation process of the accumulation process is relatively complicated. It is necessary to generate the locally estimated carrier amplitude and C / A code at the current time according to the local frequency and phase, and then multiply the carrier amplitude and signal to achieve the purpose of removing the carrier. The C / A code is multiplied and the final result is accumulated

Assuming that the sampling rate of the RF terminal is 16.368M, the above-mentioned accumulation process needs to be repeated 16368 times in 1 millisecond, and the power consumption is obviously large

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