Multi-channel multi-mode satellite navigation radio-frequency integrated circuit

Abstract

The invention provides a multi-channel multi-mode satellite navigation radio-frequency integrated circuit which is characterized by comprising n low noise amplifier input ports, n image rejection mixer output ports, n passive mixer input ports, n variable gain amplifier output ports, a mode controlling logic unit input unit and a circuit for integrating the following circuits such as a low noise amplifier set, an image rejection mixer set, a passive mixer set, a variable gain amplifier set, a mode controlling logic unit, a frequency synthesizer and a frequency divider, wherein a satellite navigation signal is input by an active antenna set, entered into the low noise amplifier set via the low noise amplifier input port, and amplified by a low noise amplifier; and the amplified radio-frequency signals are output to the image rejection mixer set. The invention integrates a plurality of multi-channel multi-mode anti-jamming satellite navigation receiving radio-frequency circuits on one chip, which is excellent in application prospect.

Description

technical field [0001] The invention relates to an integrated circuit, in particular to a multi-channel multi-mode satellite navigation radio frequency integrated circuit. Background technique [0002] The satellite navigation system consists of three subsystems: space satellite system, ground monitoring system, and user receiving system. Among them, the user receiving system is mainly composed of satellite receivers and data processing software supported by radio technology and computer technology. It is one of the three subsystems of satellite navigation and is a user-oriented terminal. Since it relies on receiving weak radio frequency satellite signals to function, it is susceptible to radio frequency interference. Radio frequency interference can be wideband, narrowband, unintentional or intentional. Because radio frequency interference cannot be predicted, when it occurs, no matter whether the signal transmitted by the satellite is intact or not, it will reduce the i...

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Problems solved by technology

[0004] Patent application number 200710069408.4 of the patent "Multi-mode Satellite Navigation Receiver RF Front-End Chip" proposes a framework method for multi-mode satellite navigation receiver RF front-end. However, the RF front-end of this patent cannot work in a wide frequency range and needs to The multi-mode control logic selects a low-noise amplifier or mixer of the corresponding frequency band from the low-noise amplifier/mixer group, resulting in a complex chip structure, large area, and high cost. At the same time, because the chip only integrates a complete receiver channels, which can only process navigation signals received by one antenna at a time, which cannot meet the requirements of mult

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