Radio frequency front-end device for dual-system and dual-frequency navigation receiver

Abstract

The invention discloses a radio frequency front-end device for a dual-system and dual-frequency navigation receiver. By using down-conversion structure twice, a low-noise amplifier, a first-stage frequency mixer, a second-stage frequency mixer, a frequency synthesizer, a first-stage medium frequency amplifier, a second-stage medium frequency amplifier, a variable gain amplifier, a signal power detector, a programmable gain amplifier, a five-bit analog-to-digital converter, an SPI protocol interface and a two-bit analog-to-digital converter are integrated on the same radio frequency front-end chip; and the radio frequency front-end device for the navigation receiver is formed by the chip, a first-stage filter and a second-stage filter. The device can simultaneously receive radio frequency signals of L1 and L2 wave bands of a global positioning system (GPS) and B1 and B2 wave bands of a big dipper second-generation navigation system (BD2) with high accuracy; the device reduces the power consumption and noise by using a design method of low power consumption and multi-layer isolating ring and deep N well technology; and because the device is implemented by using an up-to-date CMOS integrated circuit process, the device has the characteristics of low power consumption, low noise, small size and the like and can be widely applied to the fields of traffic, navigation, transportation and the like.

Description

technical field [0001] The invention relates to the field of wireless communication and navigation, in particular to a radio frequency front-end device of a dual-system dual-frequency navigation receiver. Background technique [0002] Global Positioning System (Global Position System, referred to as GPS) radio frequency signal receivers have been widely used in civil aviation, highway, navigation and other traffic navigation fields. The second-generation Beidou navigation system is a satellite navigation system independently developed and established by my country, which is of great significance to my country's economic construction. The overall goal of the development of my country's satellite navigation system is to build an independent and internationally advanced global satellite navigation and positioning system, and to drive the rapid development of related industries, promote the application of "Beidou-2" products in the national economy, and promote my country's sate...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no simultaneous high-precision reception of the first signal L1 of GPS, the second signal L2 of GPS, the first signal B1 of the second-generation satellite positioning system of Beidou, and the second signal of the second-generation satellite positioning system of Beidou Radio Frequency Receiver for B2 Band Signals

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