Broadband Frequency Hopping RF Transceiver System

A broadband frequency hopping, radio frequency transceiver technology, applied in transmission systems, electrical components, etc., can solve the problems of intermodulation interference, noise deterioration, radio frequency front-end blocking, etc., to improve concealment, reduce cost and volume, and reduce system power consumption Effect

Inactive Publication Date: 2015-08-12
NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0010] Anti-blocking interference: Traditional communication systems, especially broadband systems (frequency hopping and spread spectrum), mainly rely on intermediate frequency filtering to suppress interference. However, since the front-end high-frequency amplifiers and mixers are nonlinear devices, they will Generate unrecoverable intermodulation interference and noise degradation, that is, blockage of the RF front end

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  • Broadband Frequency Hopping RF Transceiver System

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can obviously be implemented in many other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the protection scope of the present invention.

[0053] figure 1 It is a functional block diagram of a broadband frequency hopping radio frequency transceiver system according to an embodiment of the present invention. like figure 1As shown, the broadband frequency hopping radio frequency transceiver system 100 mainly includes: a direct digital frequency synthesizer (Direct Digital Synthesizer, DDS) 101, a first DDS bandpass...

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Abstract

The invention provides a broadband frequency-hopping radio frequency transmitting and receiving system. When a signal occurs, a DDS up-converts a processed baseband signal into an intermediate-frequency signal, the intermediate-frequency signal is filtered and supplied to a fixed local oscillator (a fixed-frequency phase-locked loop) through a switch selection channel to obtain a high-intermediate-frequency signal, the high-intermediate-frequency signal is frequency-mixed with a wideband phase-locked loop to obtain a broadband radio frequency signal, and the broadband radio frequency signal is filtered and amplified after switch selection and is output through a radio frequency input and output port. Agility switching of the wideband signal is achieved through frequency transform of the wideband phase-locked loop, and agility switching of a narrowband frequency is achieved by the DDS. Frequency switching over the whole frequency band is achieved through mutual combination of the two, and the high-frequency precision of the DDS ensures the precision of the whole radio frequency output. Spurious output signals and harmonic are effectively suppressed by a digital filter and a harmonic filter. The broadband frequency-hopping radio frequency transmitting and receiving system of the invention adopts a technology combining a direct digital frequency synthesizer with a phase-locked loop and realizes transmission and receiving multiplexing.

Description

technical field [0001] The invention relates to the technical field of broadband frequency hopping radio frequency transceiver, in particular, the invention relates to a wideband frequency hopping radio frequency transceiver system. Background technique [0002] At present, the defense means of communication countermeasures can improve the anti-jamming performance of the system by improving signal concealment. Signal concealment includes the concealment of signal modes: duplex mode, modulation mode, multiplex mode, coding mode, and synchronization mode. Concealment of signal parameters: especially parameters related to anti-interference, such as: spreading sequence, frequency hopping sequence, synchronization parameters, signaling parameters, etc. [0003] Fast frequency hopping is a new technology adopted for medium and low speed frequency hopping communication systems which are susceptible to tracking interference. The main principle is: the mobile communication system p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/38H04B1/713
Inventor 唐云峰
Owner NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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