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Time-frequency compression multi-carrier transmitting method, time-frequency compression multi-carrier receiving method, transmitter and receiver

A multi-carrier reception and multi-carrier technology, which is applied in the shaping network, modulated carrier system, multi-frequency code system, etc. in the transmitter/receiver, can solve the problem of high detection complexity and inflexible and efficient implementation of ISI\ICI elimination and other issues to achieve accurate transmission and reduced detection complexity

Active Publication Date: 2019-11-08
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a time-frequency compressed multi-carrier transmission method, a reception method, a transmitter and a receiver, which are used to solve the problem of time-frequency duality in a multi-carrier system in the prior art. Dimensional compression, ISI\ICI elimination cannot be implemented flexibly and efficiently, and problems with high detection complexity

Method used

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  • Time-frequency compression multi-carrier transmitting method, time-frequency compression multi-carrier receiving method, transmitter and receiver
  • Time-frequency compression multi-carrier transmitting method, time-frequency compression multi-carrier receiving method, transmitter and receiver
  • Time-frequency compression multi-carrier transmitting method, time-frequency compression multi-carrier receiving method, transmitter and receiver

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specific Embodiment

[0125] like image 3 As shown, a schematic structural diagram of a transmitter in the embodiment of the present application is shown.

[0126] The transmitters include:

[0127] The modulation transformation module 31 is used to convert the input binary bit sequence through modulation transformation to obtain the modulation symbol sequence transmitted by the subcarrier; specifically, the binary bit sequence in the input data block is respectively subjected to encoding transformation, interleaving transformation, and constellation mapping transformation to obtain each Modulation symbol sequence for subcarrier transmission.

[0128] Orthogonal transformation module 32, coupled to the modulation transformation module 31, for performing orthogonal transformation on the modulation symbol sequence to obtain the data sequence transmitted by each subcarrier; specifically, performing orthogonal transformation on the modulation symbol sequence to obtain Data sequence transmitted by mu...

Embodiment 1

[0151] like Figure 5 As shown in FIG. 1 , it shows a BER performance comparison diagram of a multi-carrier FTN system under different frequency domain compression factors in an embodiment of the present application. Among them, free ICI / ISI is the performance boundary of the Nyquist transmission system, and the compression coefficients of the time domain and the frequency domain are respectively {k=1; α=1}. For FTN transmission, the time-domain compression factor k={0.9, 0.8, 0.6} and the frequency-domain compression factor α={0.9, 0.8, 0.67, 0.6} are respectively set. When the overall compression rate is about 0.8, one-dimensional compression in time domain {k=0.8; α=1}, one-dimensional compression in frequency domain {k=1; α=0.8} and two-dimensional compression in time-frequency {k=0.9 ; BER performance of the three FTN transmission systems with α=0.9} is similar and close to the Nyquist performance boundary; when the overall compression ratio is reduced to about 0.6, the ...

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Abstract

The invention provides a time-frequency compression multi-carrier transmitting method, a time-frequency compression multi-carrier receiving method, a transmitter and a receiver. The method comprises the following steps: carrying out modulation transformation on an input binary bit sequence to obtain a modulation symbol sequence transmitted by subcarriers, carrying out orthogonal transformation toobtain a data sequence transmitted by each subcarrier, carrying out Fourier transformation to obtain a first signal sequence, and expanding the first signal sequence into a second signal sequence; generating an FTN time domain compression frequency domain window coefficient according to the frequency domain impulse response of the shaping filter; windowing the second signal sequence by using the coefficient and performing FTN frequency domain compression operation to obtain a third signal sequence; and carrying out inverse discrete Fourier transform to obtain a fourth signal sequence, and increasing a guard interval to obtain an output signal sequence. The problems that time-frequency two-dimensional compression and ISI\ ICI elimination in a multi-carrier system cannot be flexibly and efficiently achieved and the detection complexity is high are solved, data are accurately transmitted, time-frequency two-dimensional compression and ISI\ ICI elimination in the multi-carrier system are flexible and efficient, and the detection complexity is reduced.

Description

technical field [0001] The present invention relates to a technical field of mobile communication, in particular to a time-frequency compressed multi-carrier transmission method, a reception method, a transmitter and a receiver. Background technique [0002] With the increasing demand for high-speed communication services and the continuous improvement of spectrum efficiency requirements in limited spectrum resources, the non-orthogonal technology of time domain and frequency domain is attracting extensive attention of researchers as an effective method to improve spectrum efficiency. The Faster-Than-Nyquist (FTN) transmission technology is one of the non-orthogonal transmission technologies. Because it breaks the traditional Nyquist criterion and increases the transmission rate of each FTN symbol through non-orthogonal transmission between symbols, it has become a hot spot in recent years as a time-domain solution that can effectively improve the overall spectral efficiency...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/26
CPCH04L25/03012H04L25/03343H04L27/2628H04L27/265
Inventor 李明齐彭雅秋
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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