How to optimize consumer GPS systems within the electronic equipment

Defines the worst working conditions, software-based baseband processor to the limit. After all, if the maximum load in the main processor is able to maintain the accuracy of the time, then when the main processor has more processing resources are available, it will definitely work more well.

With multimedia capabilities in consumer electronic devices, the host processor needs to handle all the basic functions normally, but have to support compressed video and streaming audio decoding and playback. Therefore, when playing video or audio when the load associated with the GNSS baseband processing would be the maximum limit. However, while video and location tracking information must be using the entire display, but users are unlikely to watch either video, and also requires high-precision location tracking information. It should be noted that in the video program, the equipment still need to maintain adequate sensitivity and precision to track the GNSS signals, to avoid losing the signal, and takes time to retrieve later. Fortunately, most of the equipment in the tracking of the GNSS satellite signals at least tolerated accuracy diminished. In order not to overload the main processor, and affect the video playback quality, developers can use, such as dead reckoning (dead reckoning) and the like techniques (see Supplementary information: the worst working conditions of the reconcile strategy) to significantly reduce the baseband processor load, and to gradually lower but still reasonable to maintain the positioning accuracy. When the need for more accurate positioning data (for example, pause the video shows the user to view their current location), GNSS systems can be handled using the current available resources, rapid recovery of positioning accuracy. In fact, many of the worst working conditions can reduce the processing l