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A power allocation method in a cross-domain transmission system based on otfs-noma

An OTFS-NOMA, transmission system technology, applied in the field of power allocation in the OTFS-NOMA-based cross-domain transmission system, can solve problems such as no power allocation, maximize throughput, ensure communication quality, and improve spectrum efficiency. Effect

Active Publication Date: 2022-07-29
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Some users are moving at high speed, some users are static or moving at low speed, the traditional allocation is based on the allocation of the same domain, and the existing cross-domain system performance does not involve power allocation

Method used

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  • A power allocation method in a cross-domain transmission system based on otfs-noma
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  • A power allocation method in a cross-domain transmission system based on otfs-noma

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Embodiment Construction

[0022] The power allocation method in the OTFS-NOMA-based cross-domain transmission system according to the present invention, the steps of the method are:

[0023] Step 1, transform the high-speed mobile user signal located in the delay-Doppler domain to the time-frequency domain and the low-speed mobile user signal originally located in the time-frequency domain as a NOMA grouping, wherein, the high-speed mobile user is used as the edge user in the traditional NOMA, As the central user in the traditional NOMA, the low-speed mobile user first obtains the superimposed signal of the high-speed mobile user signal and the low-speed mobile user signal in the time-frequency domain at the receiving end;

[0024] Step 2, transform the time-frequency domain superimposed signal (including the high-speed mobile user signal and the low-speed mobile user signal) into the delay-Doppler domain;

[0025] Step 3, the high-speed mobile user signal is a pulse signal in the delay-Doppler domain,...

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Abstract

The power distribution method in the OTFS-NOMA-based cross-domain transmission system of the present invention considers high-speed user power distribution in the DDT, and then transforms the low-speed user signal into the time-frequency domain to calculate the power value of the low-speed user. The low-speed user reuses the frequency band of the high-speed user, which effectively improves the spectral efficiency; this allocation scheme solves the problem of power distribution between high-speed mobile users and low-speed mobile users in the signal transmission process, and solves the problem that users located in different domains are difficult to effectively Communication problem; finally, the allocation scheme uses NOMA (Non-Orthogonal Multiple Access) technology and OTFS (Orthogonal Time-Frequency Space) technology to increase the number of communication users, ensure the communication quality between communication users, and improve the overall system throughput.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a power distribution method in a cross-domain transmission system based on OTFS-NOMA. Background technique [0002] With the development of high-speed traffic, high-speed mobile users have higher and higher communication demands. Some users are moving at a high speed, and some users are moving at a static or low speed. The traditional allocation is based on the same domain allocation, and the existing cross domain system performance does not involve power allocation. [0003] NOMA is a non-orthogonal multiple access technology, and OTFS is an orthogonal time-frequency modulation. Based on the OTFS-NOMA communication scenario, users have heterogeneous mobility characteristics. In the document [OTFS-NOMA: An Efficient Approach for Exploiting Heterogenous UserMobility Profiles], a cross-domain system is proposed, and the system is briefly analyzed, but no res...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/34
CPCH04W52/346
Inventor 王海荣王李王文静张军
Owner NANJING UNIV OF POSTS & TELECOMM