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Single carrier frequency domain equalization method without cyclic prefix

A single-carrier frequency domain, cyclic prefix-free technology, which is applied to the shaping network and baseband system components in the transmitter/receiver, can solve the problems of low bandwidth utilization and high CP overhead, and improve bandwidth utilization and the effect of the data transfer rate

Active Publication Date: 2015-01-14
ZHEJIANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of large CP overhead and low bandwidth utilization in the existing CP-based SC-FDE system, and propose a single-carrier frequency domain equalization method without cyclic prefix

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  • Single carrier frequency domain equalization method without cyclic prefix
  • Single carrier frequency domain equalization method without cyclic prefix
  • Single carrier frequency domain equalization method without cyclic prefix

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Embodiment Construction

[0020] A single-carrier frequency-domain equalization method without cyclic prefix. The physical frame of the non-CP-SCFDE system includes a training sequence part and a data transmission part, wherein the training sequence (UW) is a ZC sequence with a length equal to the length of an FFT block. During training A cyclic prefix (CP) is added before the sequence; the data transmission part is a data block, and the length of each block is the length of an FFT block. By performing channel estimation, inter-block interference elimination and cyclic reconstruction at the receiving end, the same performance as that of the system with CP is achieved, which effectively improves the system bandwidth utilization.

[0021] A single carrier frequency domain equalization method without cyclic prefix of the present invention, specifically comprises the following steps:

[0022] 1. The receiver receives the physical frame signal r after sampling the analog signal and digitally down-converting...

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Abstract

The invention discloses a single carrier frequency domain equalization method without a cyclic prefix. The bandwidth utilization ratio of a single carrier frequency communication system can be significantly improved. A single carrier frequency system physical frame of the method includes a training sequence portion and a data transmission portion, a training sequence is a zadoff-chu (ZC) sequence, the sequence length is fast fourier transform (FFT) block length, the cyclic prefix is added in front of the training sequence, the data transmission portion is data blocks, and each data block is in the FFT block length. According to the method, the training sequence is utilized to perform channel estimation and noise suppression, received data are subjected to an interblock interference elimination and a reconstruction of the cyclic prefix to eliminate intersymbol interference, and thereby the single carrier frequency system without the protection of the cyclic prefix can have a multipath interference resistant characteristic same to that of a single carrier frequency system with the protection of the cyclic prefix. The method has the advantages that on the basis of traditional single carrier frequency domain equalization (SCFDE), the expenses of the cyclic prefix are eliminated, and the bandwidth utilization ratio and the data transmitting rate are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of broadband wireless transmission, and in particular relates to a single-carrier frequency domain equalization method under the condition of no cyclic prefix protection. Background technique [0002] With the rapid development of wireless communication technology, broadband wireless communication system has increasingly become a focus of attention. However, in broadband wireless communication systems, the multipath effect of the channel will introduce serious inter-symbol interference (ISI), which seriously affects the communication reliability. Single carrier frequency domain equalization (SC-FDE) is a very effective method to combat multipath interference in broadband wireless transmission, due to its low complexity relative to time domain equalization, and relative to orthogonal frequency division multiple access (OFDM The two advantages of the low peak-to-average ratio of the ) technology are currently...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/02
Inventor 应军科钟杰赵民建
Owner ZHEJIANG UNIV
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