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Multi-band wireless channel measurement calibration method and system

A wireless channel and calibration method technology, applied in the field of communication, can solve problems such as limiting system measurement bandwidth, increasing hardware costs, and limited working bandwidth

Active Publication Date: 2016-11-23
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the AD / DA sampling rate of the hardware system and the working bandwidth of the radio frequency device are limited, which limits the measurement bandwidth of the system; if a higher rate AD / DA and a wider frequency band radio frequency device are used, the hardware cost will be significantly increased

Method used

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  • Multi-band wireless channel measurement calibration method and system
  • Multi-band wireless channel measurement calibration method and system
  • Multi-band wireless channel measurement calibration method and system

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Embodiment 1

[0082] This embodiment provides a processing flow of a method for measuring and calibrating a multi-band wireless channel as follows: figure 2 As shown, in this embodiment, the joint channel measurement and calibration of ten consecutive 20 MHz frequency bands in the 5 GHz frequency band is taken as an example to describe the implementation steps of the present invention in detail. Calibration environment parameter configuration such as figure 1 As shown, the transceiver adopts the same high-precision GPS clock source for synchronization, without frequency offset, and performs channel measurement of 10 continuous frequency bands in one measurement period, covering a bandwidth of 200MHz. The baseband signal format complies with the 802.11a standard, but except for the DC subcarrier, the remaining 63 subcarriers are all modulated data.

[0083] The receiving end stores the received signal for data post-processing, and first performs precise frame synchronization to ensure that...

Embodiment 2

[0130] This embodiment provides a multi-band wireless channel measurement and calibration system, and its specific implementation structure is as follows Figure 10 As shown, it can specifically include the following modules:

[0131] Calibration modeling module 101: it is used to construct a single-path calibration channel, and perform single-path calibration channel measurement of N continuous frequency bands, wherein N is not less than 1;

[0132] Model the frequency domain response over N frequency bands:

[0133]

[0134] Among them, A si (f) is the amplitude-frequency response of the system, φ si (f) is the phase-frequency response of the system, i represents the i-th frequency band;

[0135] Amplitude-frequency calibration module 102: it is used to obtain the amplitude-frequency response of each frequency band, and obtain amplitude calibration data through amplitude-frequency calibration processing;

[0136] Phase-frequency modeling module 103: it is used to mode...

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Abstract

The embodiment of the invention provides a multi-band wireless channel measurement calibration method and system. The method comprises the steps of establishing a single-path calibration channel, and performing single-path calibration channel measurement of N continuous bands, wherein the N is more than or equal to 1; obtaining the amplitude-frequency response of each band, and obtaining amplitude calibration data through amplitude-frequency calibration processing; obtaining the phase frequency response slope of each band, and obtaining sampling error calibration data according to the phase frequency response slope; obtaining the non-linear phase in each band, and obtaining non-linear phase calibration data through non-line phase calibration processing; measuring a practical channel through adoption of the N continuous bands, thereby obtaining the frequency domain response of each band of the actual measurement channel; and calibrating the frequency domain response of each band of the actual measurement channel according to the amplitude-frequency calibration, the sampling error calibration data and the non-linear phase calibration data. According to the method and the system, on the premise of not increasing hardware costs, the measurement bandwidth is multiplied, and the higher delay resolution is obtained.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for measuring and calibrating a multi-band wireless channel. Background technique [0002] Wireless mobile communication is extending from traditional human-to-human communication to intelligent interconnection between things and things, and between people and things, penetrating into wider industries and fields, creating an unprecedented emerging industry, but at the same time, massive equipment connections and diverse Network architecture will also bring new technical challenges to mobile communications. The wireless environment faced by the new-generation mobile communication system is more complex and diverse. Only by in-depth research on the characteristics of wireless channels can we carry out targeted system design and optimize system performance according to the specific application environment. [0003] The most direct way to study wireless ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/309H04W24/02
CPCH04B17/0082H04B17/309H04W24/02
Inventor 李金兴赵友平陶成谈振辉艾渤
Owner BEIJING JIAOTONG UNIV
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