Interleaved transmission method of weighted fractional Fourier transform time domain two-component signal

A technology of fractional Fourier transform and transmission method, which is applied in the field of interleaved transmission of weighted fractional Fourier transform time-domain two-component signals, which can solve problems such as poor anti-channel performance, improve performance, improve anti-interference ability, and good compatibility sexual effect

Active Publication Date: 2021-03-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor performance of the existing single-carrier communication method against channel fading, and propose a weighted fractional Fourier transform time Interleaved transmission method of two-component signals in domain

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  • Interleaved transmission method of weighted fractional Fourier transform time domain two-component signal
  • Interleaved transmission method of weighted fractional Fourier transform time domain two-component signal
  • Interleaved transmission method of weighted fractional Fourier transform time domain two-component signal

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specific Embodiment approach 1

[0044] Specific implementation mode one: as figure 1 shown. A weighted fractional Fourier transform time-domain two-component signal interleaving transmission method described in this embodiment, the method specifically includes the following steps:

[0045] Step 1. Perform baseband constellation mapping on the 0 and 1 bit data generated by the information source, and obtain the modulation result after constellation mapping;

[0046] Step 2. Group the modulation results obtained in step 1: starting from the first bit of the modulation result, divide the modulation result into M data blocks of equal length, and the length L of each data block is 2 N , N is a positive integer, each data block corresponds to a frame of data, and the i'th frame data is expressed as X i′ , i'=1,2,3,...,M, M is the total number of data blocks;

[0047] x i′ =[x 0 x 1 ... x L-1 ],x 0 , x 1 ,...,x L-1 Respectively for the i′th frame data X i′ 1st, 2nd, ..., 2nd of N data;

[0048] For a...

specific Embodiment approach 2

[0086] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the step five, the analog modulation signal X obtained in step four T0 Perform up-conversion processing to obtain the signal after the up-conversion processing, the specific form of the signal after the up-conversion processing is:

[0087]

[0088] Among them, X T1 is the signal after up-conversion processing, f c Is the center frequency of carrier modulation, t is the timing mark, and Re[·] means to take the real part.

[0089] In this embodiment, for the signal X T0 Performing up-conversion processing means: converting the analog modulation signal X T0 Modulate to the corresponding carrier frequency to get the data X on the corresponding carrier frequency T1 .

specific Embodiment approach 3

[0090] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in the step six, the receiver performs down-conversion processing on the received signal, and the signal Y received by the receiver R1 is of the form:

[0091] Y R1 =HX T1 +N T

[0092] Among them, H is the channel state information matrix, N T is random noise.

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Abstract

The invention discloses a weighted fractional Fourier transform time domain two-component signal interleaving transmission method, and belongs to the technical field of wireless communication. According to the invention, the problem of poor channel fading resistance of the existing single carrier communication method is solved. The invention designs a signal transmission method of an extended transform domain for an existing single carrier communication system, and an energy averaged signal form is formed for communication transmission by interleaving two component signals of a time domain. Because the energy of a single symbol and other multiple symbols are mixed and expanded in the process, an effect of relatively more uniformly distributing the signal energy in a time-frequency plane isachieved, the energy loss caused by channel fading is averaged to multiple symbols, the probability of distortion of a high-power signal is greatly reduced, the bit error rate under a fading channelis effectively reduced, and the reliability of the system is improved. The present invention can be applied to the technical field of wireless communications.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an interleaving transmission method of weighted fractional Fourier transform time-domain two-component signals. Background technique [0002] In the field of wireless communication, the single-carrier system is widely used in digital communication systems due to its advantages of low peak-to-average power ratio and insensitivity to frequency offset. There is room for improvement. In recent years, for the current single-carrier system, the weighted fractional Fourier transform, as a signal processing method with a complete theoretical system, low complexity and easy engineering implementation, has gradually been introduced into the research field of improving its anti-interference ability. However, the four-component characteristic of the classical weighted fractional Fourier transform makes it limited in the degree of dispersion of the time-frequency e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/18
CPCH04L1/0071H04L1/0041H04L27/18Y02D30/70
Inventor 沙学军宋鸽房宵杰
Owner HARBIN INST OF TECH
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