Dual-channel radio-frequency signal processing module for navigation receiver

Abstract

The invention relates to a navigation receiver, and discloses a dual-channel radio-frequency signal processing module for the navigation receiver. The module comprises a control logic unit, a frequency synthesizer, a common antenna, a low noise amplifier, a two-way power divider, a first radio-frequency signal filter, a first mixing unit, a first active filter, a first adjustable gain amplifier, a first analog-to-digital (A / D) convertor, a second radio-frequency signal filter, a second mixing unit, a second active filter, a second adjustable gain amplifier and a second A / D convertor, wherein the common antenna, the low noise amplifier and the two-way power divider are sequentially connected in series with one another; one output end of the two-way power divider is sequentially connected in series with the first radio-frequency signal filter, the first mixing unit, the first active filter, the first adjustable gain amplifier and the first A / D converter, and the other output end of the two-way power divider is sequentially connected in series with the second radio-frequency signal filter, the second mixing unit, the second active filter, the second adjustable gain amplifier and the second A / D converter; the frequency synthesizer at least is used for outputting two local oscillation signals and respectively controlling and selecting the first mixing unit and the second mixing unit through the control logic unit; and the first A / D convertor and the second A / D convertor are used for respectively outputting satellite digital signals.

Description

technical field [0001] The invention relates to a navigation receiver, in particular to a dual-channel radio frequency signal processing module for the navigation receiver. technical background [0002] At present, domestic navigation receivers can only use single-channel navigation systems, which are mainly suitable for receiving Global Positioning System (GPS) or Beidou second-generation navigation systems, and their working modes are relatively simple, such as only receiving and processing radio frequency signals in one frequency band. However, for areas requiring high safety performance such as aviation and high-speed rail, single-channel or single-mode navigation receivers have potential safety hazards. On the one hand, a single-channel failure causes the navigation receiver to fail; Receiver is out of order. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a dual-channel radi...

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Problems solved by technology

[0002] At present, domestic navigation receivers can only use single-channel navigation systems, which are mainly suitable for receiving Global Positioning System (GPS) or Beidou second-generation navigation systems, and their working modes are relatively single, such as only receiving and processing radio frequency signals in one frequency band

However, for areas requiring high safety performance such as aviation and high-speed rail, single-channel or single-mode navigation receivers have potential safety hazards. On the one hand, a single-channel failure causes the navigation receiver to fail; receiver failure

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