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A method and device for generating discrete domain phase noise

A technology of phase noise, generation method, applied in the direction of electrical components, digital technology network, impedance network, etc.

Active Publication Date: 2019-09-13
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, when the carrier frequency of the system is relatively high, and when the wireless communication system uses high-order modulation methods, the influence of phase noise is usually not negligible. Therefore, it is often necessary to model the phase noise when modeling the communication system In general, phase noise is expressed by its power density spectrum. Therefore, most of the current literatures provide methods for phase noise modeling in the analog domain, and few literatures provide methods for modeling phase noise in the discrete digital domain. method
[0003] However, in the research of the digital baseband system, the signal is represented in the discrete digital domain. Therefore, the method of generating phase noise in the discrete domain must be considered when adding phase noise to the simulation of the digital baseband system.
However, there is no method in the prior art that can generate discrete-domain phase noise

Method used

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  • A method and device for generating discrete domain phase noise
  • A method and device for generating discrete domain phase noise
  • A method and device for generating discrete domain phase noise

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Experimental program
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Effect test

Embodiment 1

[0097] Such as figure 1 As shown, the present embodiment provides a method for generating discrete domain phase noise, comprising the following steps:

[0098] Step 101: Convert an analog filter that generates phase noise in an analog domain into a digital filter, and determine parameters of the digital filter.

[0099] This step is the process of designing a digital filter, which is to design a digital filter by an analog filter, and convert the analog filter into a digital filter, mainly by digitizing the analog filter, that is, mapping the analog filter from the S domain to In the Z domain, the digital filter is obtained, and then the parameters of the digital filter are determined by calculation. The parameters of the digital filter in this embodiment mainly include: coefficients of the digital filter and gain factors of the digital filter.

[0100] Step 102: cascading a preset number of the digital filters to form a digital filter system, and driving the digital filter ...

Embodiment 2

[0164] Such as Figure 4 As shown, the present embodiment provides a method for generating discrete domain phase noise, including the following steps:

[0165] Step 401: Perform discretization processing on the phase noise power spectral density in the analog domain to obtain a discretized power spectral density.

[0166] The specific discretization process may include:

[0167] Determine the sampling frequency;

[0168] Determine the number of discrete points of phase noise that needs to be generated;

[0169] Converting the phase noise power spectral density in the analog domain into a discretized power spectral density according to the sampling frequency and the number of discrete points.

[0170] Preferably, in this embodiment, the sampling frequency is greater than or equal to twice the cut-off frequency of the phase noise to be generated; the sampling frequency divided by the number of discrete points is less than the start frequency of the phase noise to be generated...

Embodiment 3

[0202] Such as Figure 6 As shown, the present embodiment provides a discrete-domain phase noise generation device, including: including: a digital filter design unit, a system construction unit, and a phase noise generation unit;

[0203] The digital filter design unit is used to convert an analog filter that generates phase noise in the analog domain into a digital filter, and determine parameters of the digital filter;

[0204] The system construction unit is used to cascade a preset number of the digital filters to form a digital filter system, and use Gaussian white noise to drive the digital filter system;

[0205] The phase noise generating unit is used to obtain the output signal of the digital filter system according to the parameters of the digital filter; and obtain the phase noise in the discrete time domain according to the output signal.

[0206] Preferably, the digital filter design unit is used for:

[0207] Obtain the preset phase noise power spectral densit...

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Abstract

A method and device for generating a discrete domain phase noise. The method comprises: converting an analog filter generating a phase noise in an analog domain into a digital filter and determining a parameter of the digital filter; cascading a predetermined number of the digital filters into a digital filter system and utilizing a Gaussian white noise to drive the digital filter system; acquiring an output signal of the digital filter system on the basis of the parameter of the digital filter; and, acquiring a phase noise of a discrete time-domain on the basis of the output signal.

Description

technical field [0001] The present invention relates to the technical field of wireless communication systems, in particular to a method and device for generating phase noise in a discrete domain. Background technique [0002] In wireless communication, the carrier signal is not a single-frequency sine wave due to the instability of the local oscillator of the transmitter and receiver. This instability is often measured by phase noise. For this reason, when the carrier frequency of the system is relatively high, and when the wireless communication system uses high-order modulation methods, the influence of phase noise is usually not negligible. Therefore, it is often necessary to model the phase noise when modeling the communication system In general, phase noise is expressed by its power density spectrum. Therefore, most of the current literatures provide methods for phase noise modeling in the analog domain, and few literatures provide methods for modeling phase noise in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/00
Inventor 侯晓辉
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD