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Index modulated transmission system based on constellation point classification and arrangement

A technology of transmission system and index modulation, which is applied in the field of multiple access technology and modulation mode, can solve problems affecting the performance of communication users and achieve the effect of increasing throughput

Active Publication Date: 2018-06-15
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is predicted that by 2020, the number of M2M (Machine to Machine) terminal devices will reach 50 billion. When a large number of M2M devices request to access a cellular network cell, it will pose a challenge to the carrying capacity of the cellular network, and will also affect the H2H ( Human to Human) communication user performance

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  • Index modulated transmission system based on constellation point classification and arrangement
  • Index modulated transmission system based on constellation point classification and arrangement
  • Index modulated transmission system based on constellation point classification and arrangement

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Embodiment Construction

[0047] The following describes the OFDM-IM-PCC transmission system of the present invention in a specific implementation manner. It should be noted that the description here is only the main process of a specific embodiment, and should not be regarded as the only embodiment, each step in which is not necessary, and the entire process and its specific steps are not limited to Description of the figure and context. For example, depending on the communication quality of the wireless channel, some of the units are not necessary. For those skilled in the art, after understanding the content and principles of the present invention, they may not deviate from the principles and structures of the present invention. Under certain circumstances, various modifications and changes in form and details are made to this system, but these modifications and changes are still within the protection scope of the claims of the present invention. Obviously, for those skilled in the art, the present...

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Abstract

The invention provides a transmission system (OFDM-IM-PCC) of constellation point classification and arrangement based on orthogonal frequency division multiplexing index modulation (OFDM-IM). Extra indexes are used to transmit more information of different equipment, users and services. In the transmitting end, the equipment is grouped, different equipment in each group is distributed with different constellation mapping points, and extra equipment bit streams are input to control arrangement of different constellation point equipment, and not extra subcarrier resources are occupied; and in the receiving end, different constellation mapping points are distinguished to obtain an arrangement manner of the equipment, and data bits of extra equipment is demodulated. The system throughput is increased on the basis of the traditional OFDM system, and more equipment and users are connected without occupation of the extra subcarrier resources.

Description

technical field [0001] The present invention relates to a multiple access technology and a modulation method, in particular to a method for connecting more users, services and equipments by utilizing the OFDM-IM modulation transmission system (OFDM-IM-PCC). Background technique [0002] With the rapid development of mobile communications, people's lifestyles are constantly changing. Compared with the 4G system, 5G not only needs to increase data traffic by a thousand times, increase the maximum user experience rate by 10-100 times, but also meet 10-100 times device connection, and reduce the delay to the millisecond level. In the context of 5G, new modulation methods include amplitude phase keying (APSK), frequency quadrature amplitude modulation (FQAM), and orthogonal frequency division multiplexing index modulation (OFDM-IM). The first type is APSK, which is a combination of phase A new modulation method formed by Shift Keying (PSK) and Quadrature Amplitude Modulation (QA...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2627H04L27/2649H04L27/2697
Inventor 邵凯周博文王光宇
Owner CHONGQING UNIV OF POSTS & TELECOMM