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Radio frequency receiver radio frequency signal processing method and device

A radio frequency receiver and signal processing technology, applied in the transmission system, electrical components, etc., to achieve the effects of reducing design complexity, clear mode, and saving power consumption

Active Publication Date: 2020-12-11
BEIDOU TIANDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Embodiments of the present disclosure provide a radio frequency signal processing method and device for a radio frequency receiver, which can solve the problem that a single-link configurable radio frequency receiver simultaneously receives GNSS signals of more frequency points

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  • Radio frequency receiver radio frequency signal processing method and device
  • Radio frequency receiver radio frequency signal processing method and device
  • Radio frequency receiver radio frequency signal processing method and device

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Embodiment 1

[0056] The present disclosure discloses a radio frequency signal processing method of a radio frequency receiver, which can realize simultaneous reception of multi-frequency GNSS signals. Table 1 lists the GNSS signals, systems, frequency points and bandwidths that can be received simultaneously.

[0057] Table 1 The GNSS signals that the present invention can receive simultaneously

[0058]

[0059]

[0060] An embodiment of the present disclosure provides a radio frequency signal processing method of a radio frequency receiver, such as figure 2 As shown, the data transmission method includes the following steps:

[0061] 101. A single radio frequency input channel simultaneously receives at least two bandwidth GNSS target signals, and the GNSS target signals pass through a low noise amplifier to obtain a gain-amplified wideband GNSS target signal;

[0062] The low-noise amplifier refers to at least one broadband low-noise amplifier or at least one multi-band noise am...

Embodiment 2

[0075] In one embodiment, such as image 3 As shown, there are three intermediate frequency branches connected to the output end of the first-stage mixer module. The three intermediate frequency branches are L1 quasi-broadband signal branch, L2 quasi-broadband signal branch, L5 quasi-broadband signal branch, and The frequency quasi-broadband target signal is output by presetting three intermediate frequency branches.

[0076] At least two bandwidth GNSS target signals refer to bandwidth target signals of at least two center frequencies within the frequency range of 1160MHz to 1610MHz.

[0077] The three intermediate frequency branches all include an image suppression module, a secondary mixer module and a channel selection branch.

[0078] The image suppression modules included in the L1, L2 and L5 quasi-broadband signal branches are respectively referred to as the L1 image suppression module, the L2 image suppression module and the L5 image suppression module.

[0079] In o...

Embodiment 3

[0093] In one embodiment, such as Figure 6 As shown, the specific implementation integrates two phase-locked loop frequency synthesizers, which are respectively used to generate local oscillator signals and sampling clocks for the first-stage mixer module.

[0094] Since the sampling clock is also the reference clock for baseband digital signal processing and the local clock of the positioning system, the selection of its frequency is actually closely related to the GNSS system clock. High-quality sampling clock frequency selection enables baseband signal processing to avoid floating-point operations and round-off errors. The GNSS system clock is usually based on f0=1.023MHz.

[0095] In one embodiment, for example, the code rate of a traditional narrowband signal such as GPS-L1 C / A is fo, and the signal bandwidth is 2fo; the code rate of a wideband signal is generally 10fo, and the signal bandwidth is 20fo. The radio frequency receiver of the specific solution of the prese...

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Abstract

The invention provides a radio frequency receiver signal processing method and device, and relates to a multi-constellation multi-standard global navigation satellite system (GNSS) radio frequency receiver and a radio frequency front-end signal processing method. The problems that a time division multiplexing single-link configurable radio frequency receiver cannot receive GNSS signals of more frequency points at the same time, and a radio frequency chip adopting a multi-link parallel structure design is large in occupied area, high in power consumption or low in sensitivity, limited in anti-interference capability and inconvenient to use can be solved. According to the specific technical scheme, a single radio frequency input channel receives at least two GNSS bandwidth target signals atthe same time, the GNSS target signals pass through a low-noise amplifier to obtain gain-amplified broadband target signals, and high-intermediate frequency broadband target signals are adjusted through at least two intermediate frequency branches to obtain low-intermediate frequency quasi-broadband signals. The method is used for satellite accurate positioning and navigation in a severe signal environment.

Description

technical field [0001] The disclosure relates to the field of communication chip design, in particular to a multi-constellation multi-standard global navigation satellite system (GNSS). In particular, it relates to a radio frequency signal processing method and device for a radio frequency receiver. Background technique [0002] In recent years, the number of integrated satellite positioning devices is growing rapidly. With the rapid development of the Internet of Things and the comprehensive advancement of digital infrastructure, in the next few years, the application of location-based services in daily life and industry applications will continue to increase. Since the current technology cannot guarantee the reliability of positioning in key service scenarios such as indoors and dense urban areas, with the use of new civil signals of various navigation systems and the simultaneous construction of the Beidou No. 3 system, GNSS multi-constellation multi-standard broadband r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B1/16
CPCH04B1/0075H04B1/16
Inventor 王大鹏刘愿刘矗张元刚
Owner BEIDOU TIANDI CO LTD
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