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Communication parameter estimation method and system in blind signal detection

A technology of communication parameters and blind signals, applied in digital transmission systems, transmission systems, baseband systems, etc., can solve problems such as inaccurate estimation of roll-off factors, and achieve the effect of solving inaccurate estimation.

Active Publication Date: 2021-10-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and system for estimating communication parameters in blind signal detection, which realizes the blind estimation of the roll-off factor under the condition of poor signal-to-noise ratio and effectively solves the problem of Inaccurate roll-off factor estimation under poor SNR conditions

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  • Communication parameter estimation method and system in blind signal detection
  • Communication parameter estimation method and system in blind signal detection
  • Communication parameter estimation method and system in blind signal detection

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[0054] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0055] Such as figure 1 As shown, a communication parameter estimation method in blind signal detection includes the following steps:

[0056] S1. The transmitter sends the transmission signal s(t) formed by the raised cosine filter;

[0057] S2. Receive the signal through the receiving antenna of the receiver to obtain the signal r s (t);

[0058] S3. After the signal at the receiving antenna of the receiver is processed by a band-pass filter and down-converted, a baseband signal y(t) is obtained;

[0059] S4. After the baseband signal y(t) is processed by Fourier transform and modulus, the frequency domain signal |Y(f)| is obtained;

[0060] S5. The time domain signal after the frequency domain signal |Y(f)| is processed by spectrum a...

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Abstract

The invention discloses a communication parameter estimation method and system in blind signal detection. The method comprises the following steps: S1, sending, by a transmitter, a transmission signal s(t) formed by a raised cosine filter; S2, receiving a signal by a receiving antenna of a receiver to obtain a signal rs(t); S3, transmitting a signal at the receiving antenna of the receiver through a band-pass filter and performing down-conversion processing on the signal to obtain a baseband signal y(t); S4, performing Fourier transform and modulo processing on the baseband signal y(t) to obtain a frequency-domain signal |Y(f)|; S5, subjecting the frequency-domain signal |Y(f)| to frequency spectrum averaging and Fourier inverse transform to obtain a time-domain signal y<~>(t); and S6, according to the ratio of the minimum value to the maximum value of the y<~>(t), obtaining a roll-off factor estimation value. According to the invention, roll-off factor blind estimation is carried out on the raised cosine forming signal, and the problem that the estimation performance is not ideal when the signal-to-noise ratio condition is poor is effectively solved.

Description

technical field [0001] The invention relates to a single-input single-output system, in particular to a communication parameter estimation method and system in blind signal detection. Background technique [0002] Blind demodulation technology enables the receiver to extract some parameters of the received signal without prior information, such as: roll-off factor, carrier frequency, symbol rate, etc., so that the receiver can reconstruct the signal. In the estimation of all parameters, the blind estimation of the roll-off factor is the foundation, because the accuracy of the blind estimation of the roll-off factor determines the accuracy of the blind estimation of other parameters. [0003] In the current communication background, there is not yet a method for blindly estimating the precise roll-off factor under poor SNR conditions. . Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a me...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04L27/26H04L27/38
CPCH04L25/0238H04L25/03012H04L25/03159H04L27/2695H04L27/2691H04L27/265H04L27/26414H04L27/26538H04L27/3854Y02D30/70
Inventor 钟雲赵梦韵郭文博赵宏志
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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