Method for estimating broadband chain waveform signal-to-noise ratio and computer storage medium
A technology of signal-to-noise ratio and waveform, which is applied in the field of methods and computer storage media, can solve problems such as high computational complexity and does not consider the influence of Doppler frequency offset, and achieve low computational complexity, easy engineering implementation, and good estimation performance Effect
Inactive Publication Date: 2019-12-10
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Purpose of the invention: the technical problem to be solved by the present invention is to provide a method for estimating the signal-to-noise ratio of the broadband link waveform and a computer storage medium, which solves the shortcomings of the existing method that the calculation complexity is high and the influence of Doppler frequency offset is not considered, and can Effective and relatively simple estimation of the receiving signal-to-noise ratio of the broadband link waveform, achieving better signal-to-noise ratio estimation performance and conducive to engineering implementation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] In the method of the present invention, the sending end leaves the even-numbered subcarriers vacant, sets the odd-numbered subcarriers with a fixed ZC (Zad-OffChu) sequence, and obtains two repeated training sequences through Inverse Fast Fourier transform (IFFT); At the receiving end, two repeated training sequences are used to estimate the frequency offset, and a compensation sequence is generated to correct the frequency offset of the received data, and then the average power of the received data in the even-numbered subcarriers of the synchronization head is calculated, which is recorded as noise power, and the odd-numbered subcarriers are calculated The average power of the received data within is recorded as the signal power, and the ratio of the two is the received signal-to-noise ratio. Specific implementation methods such as figure 1 and figure 2 shown.
[0040] (1) The sending end generates two repeated training sequences and sends
[0041] (1.1) The frequ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for estimating the waveform signal-to-noise ratio of a broadband chain and a computer storage medium, and the method comprises the steps that a transmitting end enables even subcarriers to be vacant, enables odd subcarriers to be provided with a fixed ZC sequence, and obtains two repeated training sequences through inverse Fourier transform; at a receiving end, frequency offset estimation is carried out by using two repeated training sequences, a compensation sequence is generated to perform frequency offset correction on the received data, then the average power of the received data is calculated in even subcarriers of the synchronization head, the average power is recorded as noise power, the average power of the received data in odd subcarriers is calculated, the average power is recorded as signal power, and the ratio of the average power to the signal power is taken as a received signal-to-noise ratio. According to the method, the defects that an existing method is high in calculation complexity and does not consider the influence of Doppler frequency offset are overcome, the receiving signal-to-noise ratio of the broadband chain waveform can be effectively and easily estimated, good signal-to-noise ratio estimation performance is obtained, and engineering implementation is facilitated.
Description
technical field [0001] The invention relates to a signal-to-noise ratio estimation method and a computer storage medium, in particular to a method for estimating the signal-to-noise ratio of a broadband link waveform and a computer storage medium. Background technique [0002] For broadband link systems, SNR estimation plays a very important role in the system. First, the received SNR can reflect the quality of the received signal. The system selects the appropriate constellation mapping method and coding rate according to the received SNR. In order to improve the system throughput, secondly, in the minimum mean square error equalization, it is necessary to use the received signal-to-noise ratio to complete the equalization. In the article "OFDM SNR Estimation Algorithm in Dual Fading Channels" published in the journal "Electric Power Automation Equipment" in October 2013, the author proposed a new method for estimating OFDM SNR. The correlation operation and maintenance of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04B17/336H04L27/00
CPCH04L27/0014H04L2027/0026H04B17/336
Inventor 周洋陆文广朱辉樊县林梅发国
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP