Phase noise emulator for broadcast communication transmitter and significance testing method capable of resisting phase noise

A broadcast communication and emulator technology, applied in transmitter monitoring, transmission monitoring, electrical components, etc.

Active Publication Date: 2009-05-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The existing phase noise measurement method is to measure the phase noise of the transmitter local oscillator, not to test the ability of the communication system to resist the influence of phase noise. There is no similar method mentioned in the existing literature; the

Method used

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  • Phase noise emulator for broadcast communication transmitter and significance testing method capable of resisting phase noise
  • Phase noise emulator for broadcast communication transmitter and significance testing method capable of resisting phase noise
  • Phase noise emulator for broadcast communication transmitter and significance testing method capable of resisting phase noise

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Experimental program
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Embodiment Construction

[0104] A broadcast communication transmitter phase noise simulator, such as figure 1 As shown, it includes a first mixer 21, a first low-pass filter 22, a band-pass filter 23, a second local oscillator 24, a second mixer 25, a second low-pass filter 26, a first local An oscillator 27 , a controller 28 , a phase noise carrier generator 29 , a third mixer 210 , and a third low-pass filter 211 .

[0105] The radio frequency signal A output by the modulator 1 is input to the first mixer, and its center frequency is set as f s , the bandwidth is W s , and W s s ;

[0106] The first local oscillator 27 generates the first-order carrier B with a frequency of f 1 , f 1 The value of is set by the control signal J output by the controller 28, and f 1 = f s -f m , f m is the center frequency of the intermediate frequency signal C, and the carrier B is output to the first mixer 21;

[0107] In the first mixer 21, the signal A is multiplied by the carrier B, the input signal A is...

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Abstract

The invention discloses a phase noise simulator for a broadcast communication transmitter and a phase noise resistance test method, in particular a simulator device for simulating the phase noise of the broadcast communication transmitter and a method for performing a phase noise resistance test on a communication system. The phase noise simulator for the transmitter comprises a phase noise carrier generator, wherein the phase noise carrier generator is used for generating a carrier signal which satisfies a phase noise model, and the working frequency band of the simulator is set by a controller. The phase noise resistance test method tests SNR thresholds of the communication system under a Gaussian white noise channel and under the Gaussian white noise channel after being interfered by the phase noise to obtain a threshold difference produced by the two tests as the resistance of the system to the phase noise of the model. The method and the device can test the resistance of certain communication system to the interference of the phase noise of a plurality of models in a laboratory to summarize the ability of the system in resisting the phase noise, and can compare the performances of the systems to provide a reference for the research and development of the systems.

Description

technical field [0001] The invention belongs to the field of digital communication testing, and relates to a broadcast communication transmitter phase noise simulator and an anti-phase noise performance testing method. Specifically, the invention relates to a broadcast communication transmitter phase noise simulator device and a communication system Method for conducting phase noise immunity performance tests. Background technique [0002] With the development of digital communication technology, various new technologies are constantly emerging, and new digital communication systems are constantly emerging. Compared with analog modulated signals, digitally modulated signals have wider bandwidth and higher frequency. The impact of vibration and phase noise is also more sensitive, which puts forward higher requirements for the development and manufacture of equipment. [0003] Phase noise is a type of noise that is ubiquitous in oscillator circuits. The frequency and amplitu...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/10
Inventor 张晓林路程张展李铀
Owner BEIHANG UNIV
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