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Space-time coding sending method based on novel reconfigurable intelligent surface

A technology of space-time coding and transmission method, which is applied in the field of coding in mobile communication systems, can solve problems such as the reduction of signal quality at the receiving end, achieve the effects of reducing implementation complexity and power consumption, improving system performance, and easy deployment

Pending Publication Date: 2022-02-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The development of modern mobile communication reveals that the randomness and uncertainty of the wireless channel are the key factors affecting the quality of wireless transmission. The radio wave of the transmitter interacts uncontrollably with various objects on the transmission path during the transmission process, resulting in degraded signal quality

Method used

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  • Space-time coding sending method based on novel reconfigurable intelligent surface
  • Space-time coding sending method based on novel reconfigurable intelligent surface
  • Space-time coding sending method based on novel reconfigurable intelligent surface

Examples

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Effect test

Embodiment 1

[0047] Embodiment 1: see figure 1 , figure 2 , a space-time coding transmission method based on a novel reconfigurable smart surface, said method comprising the following steps:

[0048] Step 1: User A sends a pilot frequency, user B does not send a signal, the control unit turns on all M units of the new reconfigurable smart surface, and sets the reflection coefficient of the unit to 1 and the transmission coefficient to 0; according to the sent pilot frequency, the base station estimates the channel h of user A reflected by the new reconfigurable smart surface A ;

[0049] Step 2: User B sends a pilot frequency, user A does not send a signal, the control unit turns on all M units of the new reconfigurable smart surface, and sets the transmission coefficient of the unit to 1 and the reflection coefficient to 0; according to the transmitted pilot frequency, the base station estimates the channel h of user B after transmission through the new reconfigurable smart surface ...

specific Embodiment approach

[0084] Specific implementation method: refer to figure 1 — figure 2 , consider a STAR-RIS assisted uplink (Uplink) narrow-band (Narrow-band) communication system, the base station (BS) has an antenna. STAR-RIS has M units, each unit can reflect and transmit the signal sent by the base station at the same time, and the reflection coefficient is α m , the transmission coefficient is β m , where m=1,2,...,M. Since each unit is a passive passive reflection element, so 0≤|α m |≤1, 0≤|β m |≤1, and |α m | 2 +|β m | 2 =1. A RIS usually has a control unit that controls the coefficients of each reflection unit. When the RIS is used as a signal relay, the control unit is usually played by the base station or a specific user. In the Internet of Things or some special scenarios, in order to save energy and reduce complexity, RIS can also be used for sensors to send data. When RIS is used to directly modulate signals, the control unit can be an independent device, and establis...

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Abstract

The invention relates to a space-time coding sending method based on a novel reconfigurable intelligent surface, and the method comprises the steps that 1, a user A sends a pilot frequency, a user B does not send a signal, and a control unit starts all M units of the novel reconfigurable intelligent surface; 2, the user B sends the pilot frequency, the user A does not send the signal, and the control unit starts all M units of the novel reconfigurable intelligent surface; 3, in the first stage of space-time coding, the user A and the user B send pilot frequencies at the same time, and the control unit starts all M units of the novel reconfigurable intelligent surface; 4, in the second stage of space-time coding, the user A and the user B send pilot frequencies at the same time, and the control unit starts all M units of the novel reconfigurable intelligent surface; 5, the base station demodulates x(0) and x(1) by using the signals received in the first stage and the second stage. According to the scheme, the system performance is improved, and the sending method which is fast, reliable and low in implementation complexity is provided accordingly.

Description

technical field [0001] The invention relates to a coding transmission method, in particular to a space-time coding transmission method based on a novel reconfigurable smart surface, and belongs to the technical field of coding in mobile communication systems. Background technique [0002] As the fifth generation mobile communication system (5G) enters the commercial stage, the research and development of the sixth generation mobile communication system (6G) kicked off. 6G will meet people's growing communication needs in the form of full coverage, full spectrum, full application, and strong security. Potential research directions include terahertz communication, artificial intelligence, and ultra-large-scale MIMO technology. [0003] The development of modern mobile communication reveals that the randomness and uncertainty of the wireless channel are the key factors affecting the quality of wireless transmission. The radio wave of the transmitter interacts uncontrollably wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/145H04L25/02
CPCH04L1/0625H04L1/0637H04B7/145H04L25/0224H04L25/0204Y02D30/70
Inventor 盛彬刘健季晨
Owner SOUTHEAST UNIV
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