How to optimize consumer GPS systems within the electronic equipment

Figure 2. On the design of consumer electronics engineers, software-based GPS architecture also simplifies the design of RF subsystems; Moreover, this architecture does not require hardware baseband processor, but the equipment to fully tap the potential of the host processor. This makes the cost of adding GPS functionality greatly reduced, and eliminated the GPS technology will be applied to many consumer electronics product design obstacles.

Of course, GNSS baseband processor is definitely not negligible. For example, the direct impact on TTFF (Time to First Fix, TTFF) of the GNSS related processing (GNSS Correlation) chips used in the past has always been the true path demodulator correlator (finger) to be conducted; or use a DSP core to simulate the parallel correlator. Correlation function like general-purpose processor can be calculated, but in general specific GNSS applications would not be so, because the introduction of this treatment cycle cost than a dedicated ASIC with the same number of gates is much higher.

However, the main processor on the phone because of the need to complete audio / video stream of the decoding work, so in itself is strong enough. When not using the audio / video services, as part of application processors will be idle, this time you can use it to complete the baseband processor. Because these resources is already a part of architecture, therefore, use them to implement other additional costs will not be calculated. In other words, to cope with GNSS-based computin