Position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication

A design method and relay communication technology, applied in channel estimation, space transmit diversity, diversity/multi-antenna systems, etc., can solve the problems of non-target user interference, reduce user communication quality, etc., and achieve the effect of strong practicability

Active Publication Date: 2021-06-18
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, when multiple pairs of users access, the HAP acts as a relay to amplify and forward signals, and at the

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  • Position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication
  • Position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication
  • Position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication

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[0032] The technical solutions of the present invention will be described in conjunction with the accompanying drawings.

[0033] The present invention proposes a HAP auxiliary multi-pair of relay communication, first, the user sends an uplink pilot signal to the HAP, and the HAP receives and channel estimates to the user's uplink pilot signal. Get part of the user's partial channel status information; secondly, use the user's partial channel status information, the HAP calculates the predecoded matrix and calculates its own position based on maximizing the system and rate, zooming in to the target user and forwarding the signal to be transmitted by the sending end user, such as figure 1 As shown, specifically includes the following steps:

[0034] Step 1: Build an enlarged forwarding system for HAP assistant multi-to-relay relay, such as figure 2 As shown, a HAP equipped with a multi-antenna, a plurality of single antennas transmitted a user, a plurality of single antennas receiv...

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Abstract

The invention provides a position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication, and the wireless transmission method mainly comprises the following steps: a user sends an uplink pilot signal to an HAP, and the HAP receives and carries out the channel estimation of the uplink pilot signal sent by the user, so as to obtain the partial channel state information of the user; and the HAP calculates a transmit-receive precoding matrix by using partial channel state information of the user, calculates the position of the HAP based on the maximized system sum rate, and amplifies and forwards a signal to be transmitted by a transmitting end user to a target user. The method is easy to operate and practical, large-range reliable communication is provided for ground users, rapid and accurate information transmission among the ground users is ensured, and the method has important practical significance for a mobile relay-assisted multi-antenna communication system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for designing location and sending and receiving precoding in HAP-assisted multi-pair relay communication based on partial CSI. Background technique [0002] With the rapid development of wireless communication technology, high altitude unmanned platform (high altitude platform, HAP) communication system has received extensive attention in recent years, and it is an emerging wireless communication system. The HAP communication system mainly refers to the system that uses the HAP with a certain payload and equipped with an antenna to provide communication services for ground users, similar to the low-orbit satellite communication system. However, compared with low-orbit satellites, HAP has the advantages of fast movement, strong maneuverability, and low implementation cost. It can move to potential ground users at any time, and better adapt to t...

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06H04B7/185H04L25/02
CPCH04B7/0456H04B7/0626H04B7/18504H04L25/0204H04L25/0224
Inventor 张军张晗张琦成聿伦吕文俊
Owner NANJING UNIV OF POSTS & TELECOMM
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