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Transform domain diversity method based on single-carrier frequency-division multiple access system

A single-carrier frequency division, transform domain technology, applied in multi-frequency code systems and other directions, can solve the problem of weak resistance to frequency selective fading, to overcome the weak ability of time diversity to resist channel frequency selective fading, and improve the resistance to channel frequency. Selective fading capability, flexible effect of system diversity combining

Active Publication Date: 2018-04-06
XIDIAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The present invention can maintain the characteristics of low envelope fluctuation of single carrier frequency division multiple access signal, and at the same time solve the problem of weak anti-frequency selective fading ability of transform domain diversity in single carrier frequency division multiple access system

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  • Transform domain diversity method based on single-carrier frequency-division multiple access system
  • Transform domain diversity method based on single-carrier frequency-division multiple access system
  • Transform domain diversity method based on single-carrier frequency-division multiple access system

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045]Refer to attached figure 1 , the specific steps of the embodiment of the present invention are described as follows.

[0046] The present invention includes two parts, the diversity at the sending end and the combination at the receiving end, including the following steps.

[0047] The diversity steps at the sending end are as follows.

[0048] Step 1, generate a sending data block.

[0049] The signal processor at the transmitting end of the single carrier frequency division multiple access system generates serial data, where the length of the serial data is M is a positive integer multiple of , M represents the number of discrete Fourier transform DFT points that the transmitting end intends to perform on the transmitted data in a single-carrier frequency division multiple access system, and P represents the multiplicity of transform domain diversity, and i...

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Abstract

The invention discloses a transform domain diversity method based on a single-carrier frequency-division multiple access system. The method comprises the steps of (1), generating sending data blocks;(2), acquiring data blocks after a transform domain is diversified; (3), acquiring the data blocks after a weighted transform domain is diversified; (4), acquiring time domain sending signals; (5), receiving time domain sending signals; (6), acquiring transform domain data blocks; (7), weighting the transform domain data blocks; and (8), acquiring transform domain combined data blocks. According to the method, each sending data block before copying is taken as a unit and after all sending data blocks are longitudinally arranged and copied, the data blocks after the transform domain is diversified are acquired, so the method has the advantage that the diversity signal correlation is low. The data blocks after the transform domain is diversified are weighted through utilization of a weighting sequence, repetition characteristics of the data blocks after the transform domain is diversified are changed, low envelope fluctuation characteristics of transmission signals are kept, and the capability of resisting channel frequency selective fading is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a transform domain diversity method based on a single carrier frequency division multiple access system in the technical field of wireless communication. The present invention can be used in non-linear power amplifiers and channels with severe frequency selective fading to maintain low envelope fluctuations of SC-FDMA (Single-Carrier Frequency-Division Multiple Access) signals and greatly improve system performance . Background technique [0002] In non-line-of-sight channels with serious fading such as ionospheric scatter, tropospheric scatter, and mobile communications, in order to ensure the normal operation of communication, the communication system needs to adopt anti-fading technology, which is directly related to the overall performance of the communication system. Most of the existing technologies use OFDMA technology, equalization technology and diversity te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 任光亮蒋道福张会宁丁健
Owner XIDIAN UNIV
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