Large-scale random access method based on energy modulation

A random access, large-scale technology, applied in the direction of reducing energy consumption, baseband system components, channel estimation, etc., can solve the problems of low communication delay, difficult to meet high energy efficiency, etc., to reduce time overhead and improve energy Efficiency, the effect of improving communication performance

Active Publication Date: 2021-09-24
THE CHINESE UNIV OF HONG KONG SHENZHEN
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Therefore, it is difficult for this traditional communication mode to meet the communicat

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  • Large-scale random access method based on energy modulation
  • Large-scale random access method based on energy modulation
  • Large-scale random access method based on energy modulation

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[0069] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0070] Aiming at the large-scale random access problem in 5G communication, the present invention designs a random access method based on energy modulation: a random transmission strategy including energy modulation; a decoding method based on message passing; and an optimal energy constellation point design method. Consider a massive random access channel such as figure 1 As shown, the base station needs to support uplink transmission of a large number of users at the same time. At a transmission moment, only a small number of users are active and transmit information to the base station, while other users are in a dormant state. The base station needs to identify active users and decode the information sent by them; the base station is r...

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Abstract

The invention discloses a large-scale random access method based on energy modulation. The method comprises the following steps: S1, constructing a random access model based on energy modulation; S2, estimating a joint signal of user information and a channel by using a message passing algorithm; S3, detecting emission information and an active state of each user by using an algorithm based on a maximized posterior probability; and S4, designing an optimal constellation point codebook. According to the large-scale random access scheme provided by the invention, the approximate optimal constellation point is obtained, the bit error rate is effectively reduced, and the communication performance is improved.

Description

technical field [0001] The invention designs user random access, and in particular relates to a large-scale random access method based on energy modulation. Background technique [0002] With the rapid development of communication technology, base stations are more and more widely used in social life. Base stations often need to access a large number of users and support uplink transmission of a large number of users. At this time, the user access method is very important. [0003] The traditional access strategy and data transmission strategy are independent, and are divided into two steps: first, detect active users, and then perform channel estimation and data detection on detected active users. This discrete strategy requires users to complete activity detection and channel estimation through pilots before data transmission, which will result in huge time delay and performance overhead. Therefore, it is difficult for this traditional communication mode to meet the commu...

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Application Information

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IPC IPC(8): H04W74/08H04L25/02H04B7/0452
CPCH04W74/0833H04L25/0204H04B7/0452Y02D30/70
Inventor 黄川崔曙光黄坚豪
Owner THE CHINESE UNIV OF HONG KONG SHENZHEN
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