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A Collaborative System for Wireless Energy Harvesting Based on Multiple Access

A collaborative system and wireless energy technology, applied in baseband system components, transmission systems, near-field transmission systems, etc., can solve problems such as time slot collisions that cannot be completely solved, achieve good bit error rate performance, and reduce detection complexity , the effect of performance advantages

Active Publication Date: 2021-05-25
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The algorithm reduces this problem of slot collisions by determining an appropriate threshold and optimizing it according to available resources and target performance, but this method does not completely solve the problem of slot collisions
In addition, the algorithm is only suitable for short-distance transmission

Method used

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  • A Collaborative System for Wireless Energy Harvesting Based on Multiple Access
  • A Collaborative System for Wireless Energy Harvesting Based on Multiple Access
  • A Collaborative System for Wireless Energy Harvesting Based on Multiple Access

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Embodiment Construction

[0057] The design of a cooperative system scheme based on multiple access wireless energy harvesting adopted by the present invention is as follows: first consider a double-hop multiple access cooperative system, in which all users are equipped with a single antenna, such as figure 1 shown. There is no direct link between the source node S and the destination node D, and the communication takes place only through the relay node R. The relay node R decodes the data received from the source S and retransmits it to the destination D. Suppose the source S is equipped with N users and L time slots, and the destination node D is equipped with N r Root receiving antenna. The relay node R is also equipped with a receiving antenna and N t root antenna. Assuming that the decode-and-forward (DF, decode-and-forward) relay has no external power supply, the required power can be realized by energy harvesting (EH, energy harvesting). The first link from the source node S to the relay no...

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Abstract

The present invention discloses a cooperative system for wireless energy collection based on multiple access. The system combines a novel NOMA technology - quadrature index modulation multiple access (QIMMA, quadrature index modulation multiple access), which can be used in Rayleigh fading Under the channel, a low-energy uplink NOMA transmission system based on the wireless information and power transfer (SWIPT, simultaneous wireless information and power transfer) cooperative network is studied, which is denoted as cooperative QIMMA‑SWIPT. Specifically, multiple remote users communicate with the base station, while a relay exists, using a decode-and-forward scheme to help the remote users. The present invention derives the theoretical upper bound of the average bit error rate of QIMMA-SWIPT, and proves through simulation that, under the condition of consistent spectrum efficiency, the bit error rate performance of cooperative QIMMA-SWIPT is better than that of existing cooperative IMMA-SWIPT and SCMA-SWIPT system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a wireless energy collection cooperation system based on multiple access. Background technique [0002] Harvesting energy from radio-frequency (RF, radio-frequency) signals has become an attractive strategy to overcome limited battery life in wireless communication networks. The dual use of RF signals to convey energy and transmit information is known as SWIPT. Energy harvesting can recharge wireless communication network batteries from external energy sources such as wind, solar energy, and RF signals. SWTPT technology communicates information and harvests energy in the network at the same time, therefore, SWIPT, if implemented at energy-constrained nodes, can meet the energy demand of repeaters. Currently, two different protocols are widely used, namely, power-splitting receiver (PSR, power-splitting receiver) and time-splitting receiver (TSR, time-switching re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00H04L25/08
CPCH04L25/08H04B5/79
Inventor 金小萍吴青
Owner CHINA JILIANG UNIV