动态相控阵技术在V2X无线通信中的应用

IF 4.8 2区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Jacob R. Randall;Michael Dittman;Mauro Ettorre;Jeffrey A. Nanzer
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引用次数: 0

摘要

在这封信中,我们提出了一种紧凑高效的动态天线阵列系统,用于车辆到一切(V2X)通信应用,能够控制空间狭窄的信息波束,以提供物理层的无线安全性。该技术在室内和室外环境中进行了演示,采用2.5 GHz $1\times2$贴片天线阵列,其间距为$0.5\lambda$,采用威尔金森分频器和串联双极双掷(DPDT)射频开关进行幅度不平衡馈电。在两个天线输入之间快速切换分压器的输出,会引起相位中心沿阵列轴线的电运动,从而产生定向调制,从而在不希望的方向上增加误码率(BER),但在期望的方向上保持零误码率。传统的相位加权可以将未损坏的信息引导到任意方向。无线通信安全演示使用16-QAM调制传输在48kbit爆发。数据流是一个伪随机比特序列(PRBS),以4mb /s的速率传输。DPDT射频开关的驱动速度降低了三个数量级,为1khz。通信系统的最小信噪比为25 dB,因此任何误码都是由于相位和幅度动态引起的,而不是由于低信噪比引起的。动态阵列在侧舷信息波束$25^\circ$范围内获得了$10^{-3}$的低误码率,当阵列转向$\pm 30^\circ$时获得了$\sim45^\circ$的低误码率,而传统的静态阵列在各个角度都产生了低误码率(没有无线安全性)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Dynamic Phased Array for Steerable Secure V2X Wireless Communications
In this letter, we present a compact and efficient dynamic antenna array system for vehicle-to-everything (V2X) communications applications that is capable of steering a spatially narrow information beam to provide increased wireless security at the physical layer. The technique is demonstrated in both indoor and outdoor environments with a 2.5 GHz $1\times2$ patch antenna array with $0.5\lambda$ spacing with an amplitude imbalanced feed using a Wilkinson divider and an in-series double-pole-double-throw (DPDT) RF switch. Switching the outputs of the divider rapidly between the two antenna inputs induces an electrical motion of the phase center along the axis of the array, creating directional modulation that increases the bit error ratio (BER) towards undesired directions, but maintains zero BER at the desired direction. Traditional phase weighting can be used to steer the uncorrupted information to an arbitrary direction. Wireless communication security is demonstrated using 16-QAM modulation transmitted in 48-kbit bursts. The data stream is a pseudo-random bit sequence (PRBS) transmitted at a rate of 4 Mb/s. The DPDT RF switch was driven three orders of magnitude slower at a rate of 1 kHz. The communication system operated at a minimum SNR of 25 dB so that any bit errors were due to the phase and amplitude dynamics, and not due to low SNR. The dynamic array obtained a low BER of $10^{-3}$ within an information beam of $25^\circ$ at broadside, and $\sim45^\circ$ when the array is steered to $\pm 30^\circ$, while a traditional static array yielded low BER at all angles (no wireless security.
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来源期刊
CiteScore
8.00
自引率
9.50%
发文量
529
审稿时长
1.0 months
期刊介绍: IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.
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