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Transform Domain Diversity Method Based on Single Carrier Frequency Division Multiple Access System

A single-carrier frequency division and transform domain technology, applied in the direction of multi-frequency code system, etc., can solve the problem of weak anti-frequency selective fading ability, to overcome the weak anti-channel frequency selective fading ability of time diversity and flexible system diversity combination , the effect of low peak-to-average ratio

Active Publication Date: 2019-10-11
XIDIAN UNIV
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  • Application Information

AI Technical Summary

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 transform domain diversity method based on single carrier frequency division multiple access system, its steps are: (1) generate and transmit data block; (2) obtain the data block after transform domain diversity; (3) obtain the data block after weighted transform domain diversity ; (4) Obtain the time-domain transmission signal; (5) Receive the time-domain transmission signal; (6) Obtain the transform domain data block; (7) Weight the transform domain data block; (8) Obtain the transform domain combined data block. The present invention uses each transmission data block before duplication as a unit, vertically arranges all transmission data blocks after duplication, and obtains the method of data blocks after transform domain diversity, so that the present invention has the advantage of low correlation of diversity signals; The sequence weights the data blocks after transform domain diversity, changes the repetition characteristics of the data blocks after transform domain diversity, maintains the characteristics of low envelope fluctuation characteristics of the transmitted signal, and improves the ability to resist channel frequency selective fading.

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 nonlinear 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 tec...

Claims

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Application Information

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Patent Type & Authority Patents(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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