基于D2D通信和虚拟MIMO的飞行器集群网络传输方案设计

doi:10.12382/bgxb.2022.1222

摘要/Abstract

摘要：

在无中心飞行器集群网络中,非直通条件节点间不同的中继路径可能导致较大路径损耗落差,为有限资源前提下网络传输能力的提升带来困难。参考5G移动通信中的终端直通(Device to Device,D2D)技术与中继通信中的虚拟多输入多输出(Multiple-Input Multiple-Output,MIMO)技术,提出一套D2D通信与虚拟MIMO技术结合的无中心飞行器集群网络传输方案。重点研究在正交资源模式下,将不同的协作传输协议与空时编码进行组合,在信噪比、误比特率、接入概率等方面对通信性能的影响。仿真结果表明:D2D通信与虚拟MIMO技术结合的传输方案在不增加资源的前提下,对集群网络的通信性能有明显提升,且引入分布式空时编码可进一步优化误比特率性能,但3种传输协议在不同传输质量评价方向的改善有所不同。

关键词: 飞行器集群网络, 终端直通通信, 虚拟多输入多输出, 协作传输协议, 空时编码

Abstract:

For the purpose of improving the performance of multi-aircraft network without applying for more resources, a transmission scheme that combines the device-to-device (D2D) communication of 5G with the virtual multiple-input multiple-output (MIMO) of relay communication is proposed, in the network that some nodes can connect directly and the path loss varies with different routes. The transmission scheme focuses on impact to signal-to-noise ratio, bit error rate and access probability which are caused by various combinations of cooperative communication protocols and distributed space time coding (DSTC). The simulated results show that the proposed transmission scheme based on D2D and virtual MIMO's combination can effectively improve the performance of multi-aircraft network without adding the resources, and the distributed space time coding is introducing to further optimize the performance of bit error rate. And the improvements of evaluating indicators of 3 transmission protocols are different.

Key words: multi-aircraft network, D2D communication, virtual MIMO, cooperative transmission protocol, distributed space time coding

中图分类号:

TN929

刘志峰, 张雪, 栗苹, 张继豪, 李思琪, 王卫东, 龚鹏. 基于D2D通信和虚拟MIMO的飞行器集群网络传输方案设计[J]. 兵工学报, 2024, 45(4): 1141-1147.

LIU Zhifeng, ZHANG Xue, LI Ping, ZHANG Jihao, LI Siqi, WANG Weidong, GONG Peng. Research on the Transmission Scheme of Multi-aircraft Network Based on D2D Communication and Virtual MIMO[J]. Acta Armamentarii, 2024, 45(4): 1141-1147.

图/表 9

图1 三点协作模型图

Fig.1 Three-point collaboration model diagram

表1 3种基本传输协议

Table 1 Three basic transmission protocols

阶段	协议1	协议2	协议3
1	S→R及S→D	S→R及S→D	S→R
2	S→D及R→D	R→D	S→D及R→D

表2 功率分配方案

Table 2 Power distribution scheme

工况	第1阶段		第2阶段
工况	S	R	S	R
协议1	P	0	P/2	P/2
协议2	P	0	0	P
协议3	P	0	P/2	P/2
协议1+DSTC	P	0	P/2	P/2
协议3+DSTC	P	0	P/2	P/2

表3 信噪比分析仿真条件

Table 3 SNR analysis simulation conditions

参数	数值
总功率/dBm	10
带宽/MHz	10
噪声功率谱密度/(dBm·Hz^-1)	-174

图2 信噪比分析仿真结果

Fig.2 Signal to noise ratio analysis simulation results

表4 误比特率分析仿真条件

Table 4 Bit error rate analysis simulation conditions

参数	参数值
带宽/MHz	10
噪声功率谱密度/(dBm·Hz^-1)	-174
源用户与中继用户距离/m	50
目的用户与中继用户距离/m	50

图3 误比特率分析仿真结果

Fig.3 Bit error rate analysis simulation results

表5 接入概率分析仿真条件

Table 5 Access probability analysis simulation conditions

参数	参数值
总功率/dBm	10
信噪比门限/dB	5
用户密度/(个·m^-2)	5
带宽/MHz	10
噪声功率谱密度/(dBm·Hz^-1)	-174

图4 接入概率分析仿真结果

Fig.4 Access probability analysis simulation results

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