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Frequency domain serial correlation channel measurement method based on hypersonic scene

A channel measurement and hypersonic technology, which is applied in the field of communication, can solve the problem of low channel parameter measurement accuracy, avoid channel measurement bandwidth limitations and improve accuracy

Active Publication Date: 2017-06-13
XIDIAN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a frequency domain sequence correlation channel measurement method based on a hypersonic scene, which is used to solve the problem caused by the limited channel measurement bandwidth in the existing time domain sequence correlation channel measurement method. The technical problem of low channel parameter measurement accuracy

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  • Frequency domain serial correlation channel measurement method based on hypersonic scene
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[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 , a frequency domain sequence correlation channel measurement method based on a hypersonic scene, comprising the following steps:

[0022] Step 1, select the type and length of the channel measurement sequence, obtain the channel measurement frequency domain complex sequence, and select the baseband bandwidth and sampling rate of the channel measurement at the same time:

[0023] Traditional channel measurement sequences include m-sequence, Chirp sequence and CAZAC sequence, etc. Compared with m-sequence and Chirp sequence, CAZAC sequence has the following excellent properties: the amplitude of the sequence of any length is constant at 1; the sequence is self-ambiguity function and mutual The performance of the fuzzy function is good, and the change of the frequency offset only affects the amplitude of the se...

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Abstract

The invention provides a frequency domain serial correlation channel measurement method based on a hypersonic scene, for solving the technical problem of low channel parameter measurement accuracy caused by a limited channel measurement bandwidth in the hypersonic scene of the existing time domain serial correlation channel measurement method. The method comprises the following steps: selecting channel measurement parameters, and generating a frequency domain measurement sequence; performing inverse Fourier transform on the measurement sequence to generate a time domain measurement sequence; selecting a hypersonic channel frequency offset, performing Fourier transform to obtain a hypersonic channel frequency domain parameter, and performing hypersonic channel fading and noise pollution on the time domain measurement sequence to obtain time domain channel measurement data; performing Fourier transform on the time domain channel measurement data to obtain channel measurement frequency domain data, and performing sliding correlation processing on the channel measurement frequency domain data and the frequency domain measurement sequence to obtain channel frequency domain impulse response; and comparing the channel frequency domain impulse response with the hypersonic channel frequency domain parameter to obtain a normalized mean square error of channel measurement.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a frequency domain sequence correlation channel measurement method, in particular to a frequency domain sequence correlation channel measurement method based on hypersonic scenarios, which can be used in high Doppler frequency offset scenarios with limited channel measurement bandwidth Channel parameter extraction in . Background technique [0002] As a crucial link in a communication system, a wireless channel is a prerequisite for designing a communication system. The quality of the channel directly affects the communication performance. In order to obtain accurate channel parameters, it is necessary to use different methods to measure various channels. The early channel measurement method is the pulse channel measurement method, but in order to meet the channel measurement requirements, this method has defects such as high peak power and low multipath resolution. Aiming...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/309
CPCH04B17/309
Inventor 任光亮仙冰冰张会宁
Owner XIDIAN UNIV
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