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Selective mapping-based universal filtering multi-carrier method

A technology of selective mapping and multi-carrier, applied in modulation carrier system, multi-frequency code system, multiple use of transmission path, etc., can solve the problems of system performance degradation, PAPR research has not received enough attention, etc., to achieve PAPR performance improvement, The effect of increasing capacity and improving energy efficiency

Active Publication Date: 2019-03-15
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

Although the PAPR of OFDM is well known, the research of PAPR of UFMC has not received enough attention
According to the current literature review, only W RONG proposed a low-complexity PTS (LC-PTS) UFMC to reduce the PAPR of the system. Unfortunately, the system performance has declined.

Method used

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  • Selective mapping-based universal filtering multi-carrier method
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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] Due to the sub-band filtering of UFMC, SLM and UFMC cannot be simply combined, but some modules need to be adjusted. After reasonable design, a general filtering multi-carrier system based on selective mapping is proposed. Through the combination of UFMC and SLM, the PAPR performance of the system is effectively improved. The simulation also shows that SLM-UFMC can achieve Prob(PAPR>PAPR0)=10 -4 The PAPR of UFMC is reduced by up to 1.8dB, which also makes SLM-UFMC more in line with the needs of 5G green communication, and the present invention is easy to combine with non-orthogonal multiple access technology to further improve the capacity of the system, which also provides UFMC with the future 5G small packet It lays the foundation for low-latency transmission scenarios and large-scale applications in the Internet of Things and machine-to-machi...

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Abstract

The invention provides a selective mapping-based universal filtering multi-carrier method, which comprises the following steps: dividing a sub carrier into B sub bands, extending each sub band into Udifferent candidate sub bands, multiplying each of the candidate sub bands with a group of randomly generated twiddle factors, filtering the sub carrier of each sub band with an FIR filter, selectingone sub band with the minimum peak-to-average power ratio (PAPR) from the sub bands of a sending end for transmission, superposing transmission signals, in a time domain, in the B sub bands selected from the sub bands to form a new sending signal, performing fast Fourier transform on received signals, removing an interference signal, directly recovering the sending signal from the received signalsthrough a linear equalization method, and performing twiddle factor reversing operation on an equalized signal to reconstruct an original sending signal. The PAPR performance of the selective mapping-based universal filtering multi-carrier method is effectively improved, and the selective mapping-based universal filtering multi-carrier method has a certain engineering application value.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a general filtering multi-carrier method. Background technique [0002] In the 4G era, the commercialization of LTE-Advanced basically meets people's needs for multiple transmissions such as voice, video, and network, and greatly enriches people's growing spiritual and cultural life. However, with the continuous improvement of image resolution and the increase of user online time, mobile data traffic has exploded exponentially, massive IoT devices are emerging, and new application scenarios are emerging, such as: holographic projection, unmanned driving, robots, Artificial intelligence, augmented reality, and mobile social networking, etc. The existing 4G network can no longer meet the needs of future communication, so 5G came into being under this background. Unlike the single application scenario of 4G, IoT and M2M communication will become the main driving for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/26
CPCH04L5/0008H04L5/003H04L27/2614H04L27/264
Inventor 魏山林李辉张文杰韩刚王伟光
Owner NORTHWESTERN POLYTECHNICAL UNIV
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