Novel system architecture of navigation radio frequency (RF) receiver with low power consumption

Abstract

The invention provides novel system architecture of a navigation radio frequency (RF) receiver with low power consumption. The system architecture comprises a first down converter and two orthogonal second down converters and also comprises a divide-by-2 divider of a frequency synthesizer, wherein the first down converter and the two orthogonal second down converters are arranged in a signal channel in sequence and are used for carrying out twice down conversion on the RF signals received by the signal channel; and the divide-by-2 divider is arranged in a same sub-chip together with the first and second down converters, directly outputs the output frequency of a voltage-controlled oscillator to the first down converter and outputs the output frequency of the voltage-controlled oscillator to the second down converters after dividing the output frequency by 2. The system architecture has the following advantages: the system architecture is optimized and improved and the design requirements of a plurality of submodules such as an intermediate frequency (IF) filter, a prescaler and the like for subsequent signal processing are simplified through twice IF conversion, thus using a single submodule with lower power consumption to achieve the aim of reducing the power consumption of the whole navigation chip while realizing the receiving function of the navigation chip towards the RF signals.

Description

technical field [0001] The invention relates to a radio frequency chip in the field of wireless communication, in particular to a system architecture of a novel low power consumption navigation radio frequency receiver. Background technique [0002] The global navigation and positioning system (GPS) has been widely used in vehicle navigation, vehicle tracking, time synchronization, surveying and mapping, ship or vehicle monitoring, geographic data collection, aerospace industry and so on. So far, the largest and most users of navigation and positioning systems are vehicle and hand-held navigation. In handheld navigators (PND, Portable Navigation Device) or similar applications, since the entire navigator is powered by batteries, the chip power consumption of the navigation system has a special meaning for this application: the lower the power consumption, the longer the use time longer. At present, in the market, companies like SiRF in the United States, SiGe in Canada and...

AI Technical Summary

Problems solved by technology

[0006] However, with the increasing number of handheld navigation applications, especially the entry of navigation functions into the smartphone platform, the system architecture of the above-mentioned traditional navigation RF receiver can no longer meet the more demanding requirements of more and more users on the power consumption of navigation chips. requirements

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