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Multi-carrier signal vector diversity combining method against frequency selective fading

A frequency-selective, multi-carrier signal technology, applied in the direction of modulated carrier system, multi-frequency code system, digital transmission system, etc., to achieve reduced complexity, good resistance to channel frequency selective fading characteristics, and high engineering realizability Effect

Active Publication Date: 2019-01-25
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Using channel frequency response to characterize the reliability of each subcarrier data of a multicarrier symbol

Method used

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  • Multi-carrier signal vector diversity combining method against frequency selective fading
  • Multi-carrier signal vector diversity combining method against frequency selective fading
  • Multi-carrier signal vector diversity combining method against frequency selective fading

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Refer to attached figure 1 , to further describe the implementation steps of the present invention.

[0047] Step 1, generate coded and modulated data.

[0048] The multi-carrier modulation system generates a binary sequence, encodes and modulates the binary sequence, and obtains coded and modulated data.

[0049] The encoding refers to any one of turbo encoding, block encoding, convolutional encoding, LDPC encoding, and tail-biting convolutional encoding.

[0050] The modulation refers to any one of the three modes of frequency modulation modulation, phase modulation modulation and amplitude modulation modulation.

[0051] Step 2, perform multi-carrier modulation.

[0052] Multi-carrier modulation is used to perform multi-carrier modulation on coded and modulated data to obtain modulated multi-carrier wireless signals.

[0053] The multi-carrier modulation...

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PUM

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Abstract

The invention discloses a multi-carrier signal vector diversity merging method for resisting frequency selective fading, which comprises the following steps: generating coded modulated data; multicarrier modulation; insert guard interval and cyclic prefix; acquiring a plurality of wireless received signals; remove guard intervals and cyclic prefix operations; multicarrier demodulation; channel equalization of sub-carrier data in frequency domain; solving vector diversity and weight vectors of each received sub-carrier data; vector diversity merging is performed on the equalized multi-channel data; data demodulation; and soft decoding. The invention has the advantages of strong ability of resisting channel frequency selective fading, low algorithm complexity and simple realization, and finally improves diversity merging performance of a multi-channel multi-carrier system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a multi-carrier signal vector diversity combination method for resisting frequency selective fading in the technical field of wireless communication. The invention can implement vector diversity combination of multi-path data in a multi-carrier communication system to resist channel frequency selective fading. Background technique [0002] Common multi-carrier systems include: Orthogonal Frequency Division Multiplexing OFDM (Orthogonal Frequency Division Multiplexing), Single-carrier Frequency-Division Multiple Access SC-FDMA (Single-carrier Frequency-Division Multiple Access), Multi-carrier Code Division Multiple Access MC-CDMA (Multi Carrier-Code Division Multiple Access), these multi-carrier systems have been widely used in high-speed, high-quality data transmission scenarios, and are easy to integrate with CDMA (Code division multiple access), TDMA (Time division ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2602H04L27/2627H04L27/2649
Inventor 任光亮袁建国张会宁贾煜
Owner XIDIAN UNIV
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