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Single carrier frequency-domain equalization method based on sub-block analysis

A technology of single-carrier frequency domain and equalization method, which is applied in the direction of baseband system components, shaping network in transmitter/receiver, etc., can solve the problems of increasing hardware complexity and implementation complexity, etc., to simplify the equalization implementation process and eliminate Inter-block interference, performance-enhancing effects

Active Publication Date: 2015-12-02
XIDIAN UNIV
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Problems solved by technology

The process of eliminating inter-block interference not only greatly increases the hardware complexity, but also is more complicated to implement.

Method used

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  • Single carrier frequency-domain equalization method based on sub-block analysis
  • Single carrier frequency-domain equalization method based on sub-block analysis
  • Single carrier frequency-domain equalization method based on sub-block analysis

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Embodiment Construction

[0035] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] figure 1 The working principle of the single-carrier frequency-domain equalized SC-FDE system shown is: the data part is coded, interleaved and modulated at the sending end first, according to figure 2 The frame structure shown is inserted with the unique word UW, where DATA is the data part, which passes through the shaping filtering process, and then passes through the channel, and first undergoes matching filtering at the receiving end, and performs channel estimation according to the received signal to obtain the channel matrix, and performs fast Fourier on the received signal Fourier transform FFT, perform equalization processing, obtain frequency domain equalized data, pass frequency domain equalized data through fast Fourier inverse transform IFFT, obtain time domain equalized data, and then undergo deinterleaving, decoding and other proce...

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Abstract

The present invention discloses a single carrier frequency-domain equalization method based on sub-block analysis mainly for solving the problems in the prior art that the hardware complexity is high, and the realization process is complicated. The single carrier frequency-domain equalization method based on sub-block analysis comprises the realization steps of 1, intercepting a fast Fourier transform (FFT) block of which the length is N from a reception terminal, and dividing the FFT block into a plurality of sub-blocks; 2, carrying out the N-point FFT on the intermediate channel response in the time quantum of the i-th sub-block; 3, calculating the coefficients of an equalizer to obtain the frequency-domain equalization data of the whole FFT block; 4, obtaining the time domain equalization data of the whole FFT block by the frequency-domain equalization data; 5, obtaining the time domain equalization data of the i-th sub-block; 6, splicing the time domain equalization data of the sub-blocks to obtain a final equalization result. According to the present invention, by carrying out the frequency domain equalization in the FFT block, the interblock interference does not need to be eliminated, thereby reducing the hardware complexity, and simplifying the equalization realization process. Moreover, the single carrier frequency-domain equalization method based on sub-block analysis has a better bit error rate performance than the prior art, and is suitable for the worse channel environments.

Description

technical field [0001] The invention belongs to the technical field of short-wave communication, and particularly relates to a single-carrier frequency-domain equalization method, which is used for eliminating intersymbol interference introduced by a channel and improving the performance of a receiver. Background technique [0002] Shortwave communication, also known as high frequency HF radio communication, relies on electromagnetic waves of 1.5MHz to 30MHz for communication. Because short-wave communication can realize long-distance communication without relay, and has the advantages of simple equipment, flexible maneuverability, strong invulnerability and fast network reconstruction, it is widely used in government, diplomacy, military, business, meteorological and other departments, especially military departments. . [0003] Shortwave communication is mainly carried out in two ways: ground wave transmission and sky wave transmission. Ground wave transmission increases...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L25/02
Inventor 马卓杜栓义张婷婷孙霖楠
Owner XIDIAN UNIV
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