Signal processing method based on quasi high-order square spectrum

A signal processing and high-frequency signal technology, applied in baseband system, baseband system components, shaping network in transmitter/receiver, etc., can solve problems such as maintenance, discrete spectral line weak calculation complexity, etc. The effects of strong features, slow attenuation of spectral line features, and high engineering application value

Active Publication Date: 2019-03-29
XIDIAN UNIV
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Problems solved by technology

The invention not only maintains the discrete spectral line characteristics of the high-order power spectrum of the signal, but also solves the problem of the weaker discrete spectra

Method used

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  • Signal processing method based on quasi high-order square spectrum
  • Signal processing method based on quasi high-order square spectrum
  • Signal processing method based on quasi high-order square spectrum

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[0032] The present invention will be further described below in conjunction with the drawings.

[0033] Reference attached figure 1 The specific steps of the implementation of the present invention are described as follows.

[0034] Step 1. Obtain a time-domain complex baseband signal.

[0035] The analog-to-digital conversion module of the wireless communication signal processing receiver is used to convert the radio frequency analog signal received by the radio frequency antenna into a time domain high frequency signal.

[0036] In the field of non-cooperative communication, the center frequency of the time-domain high-frequency signal is obtained by using the center of gravity estimation formula, and in the field of cooperative communication, the center frequency of the time-domain high-frequency signal is obtained according to the cooperative communication protocol.

[0037] In the field of non-cooperative communication, use the following formula to obtain the center frequency of th...

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Abstract

The invention discloses a signal processing method based on a quasi high-order square spectrum. The signal processing method based on the quasi high-order square spectrum comprises the steps of: (1),obtaining a time-domain complex baseband signal; (2), obtaining an envelope sequence and a phase sequence of the time-domain complex baseband signal; (3), obtaining a quasi high-order square signal; (4), obtaining the quasi high-order square spectrum of the time-domain complex baseband signal; and (5), obtaining the spectrum refined quasi high-order square spectrum of the time-domain complex baseband signal. According to a quasi high-order square spectrum calculation method adopted in the invention, the spectral line characteristics of the traditional high-order square spectrum are reserved; furthermore, the operation complexity of calculating the high-order square spectrum is greatly reduced; the spectral line characteristic detection performance of the high-order square spectrum is improved; and thus, the identification performance of the high-order square spectrum in the modulation identification aspect is improved. According to the signal processing method based on the quasi high-order square spectrum disclosed by the invention, a spectrum refining method is adopted at the same time; a spectrum near the spectrum line characteristics is refined; therefore, the spectrum distinguishing rate is increased; and the estimation performance of the high-order square spectrum in frequency offset and baud rate estimation aspects is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a signal processing method based on quasi-high-order spectrum in the technical field of wireless communication. The invention can be used in the field of signal processing to realize blind identification of modulation types of wireless signals, estimation of frequency deviation and baud rate. The invention not only has a high spectral line feature extraction rate, but also has low computational complexity, and has wide engineering application value. Background technique [0002] With the development of wireless communication, spectrum resources are becoming scarcer and more modulation patterns are available. Modulation recognition technology can not only be widely used in spectrum sensing, but also monitor spectrum usage resources in real time, thereby improving the utilization rate of spectrum resources. , Modulation identification can also be widely used in militar...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/00
CPCH04L25/03828H04L27/0012H04L27/0014
Inventor 任光亮蒋道福张会宁
Owner XIDIAN UNIV
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