将低成本的标签用于射频识别(radio frequency identification，RFID)系统有利于促进物联网(the internet of things，IoT)的发展，为了降低标签成本，提出了L型微带谐振器加载的无芯片标签。标签采用收发正交的两面超宽带(ultra wideband，UWB)圆盘单极天线，通过长度不等的L型微带谐振器和50 Ω传输相耦合构成L型微带谐振器加载无芯片标签。在4.80 ⁓ 10.93 GHz频带上得到了20 bits的频率位置编码容量；将幅度调制和频率位置调制进行混合编码后得到60 bits的编码容量。通过制作4 bits编码容量的几种典型编码的标签进行测试，测试结果和仿真结果基本一致。

PTN网络承载多种无线业务的规划是当前移动通信网络的重要课题。通过对4G和GSM业务承载的组网及保护方案的规划研究，提出面向全频段VoLTE场景的“二层充分共享、三层适度分离、容灾快速调度”传输解决新思路，并通过维护便利性、业务安全性以及5G承载演进说明方案的优势和推广价值。

The growth of smart vehicles and computation- intensive applications poses new challenges in providing reliable and efficient vehicular services. Offloading such applications from vehicles to mobile edge cloud servers has been consid- ered as a remedy, although resource limitations and coverage constraints of the cloud service may still result in unsatisfac- tory performance. Recent studies have shown that exploiting the unused resources of nearby vehicles for application execution can augment the computational capabilities of application owners while alleviating heavy on-board workloads. However, encourag- ing vehicles to share resources or execute applications for others remains a sensitive issue due to user selfishness. To address this issue, we establish a novel computation offloading mar- ketplace in vehicular networks where a Vickrey–Clarke–Groves based reverse auction mechanism utilizing integer linear pro- gramming (ILP) problem is formulated while satisfying the desirable economical properties of truthfulness and individual rationality. As ILP has high computation complexity which brings difficulties in implementation under larger and fast changing network topologies, we further develop an efficient unilateral- matching-based mechanism, which offers satisfactory suboptimal solutions with polynomial computational complexity, truthfulness and individual rationality properties as well as matching stability. Simulation results show that, as compared with baseline methods, the proposed unilateral-matching-based mechanism can greatly improve the system efficiency of vehicular networks in all traffic scenarios.

The inherent broadcast characteristics of the visible light communication (VLC) channel makes VLC downlinks sus- ceptible to unauthorized terminals in many actual VLC scenarios, such as offices and shopping centers. This paper considers a multiple-input-single-output (MISO) VLC scenario with multiple light fixtures acting as the transmitter, a VLC receiver as the legitimate user, and an eavesdropper attempting to intercept the undisclosed information. To improve the confidentiality of VLC links, a physical-layer anti-eavesdropping framework is proposed to obscure the unauthorized eavesdroppers and diminishes their capability of inferring the information through smart beamform- ing over the MISO VLC wiretap channel. To cope with the intractable problem of finding the theoretically optimal solution of the secrecy rate and utility for the MISO VLC wiretapping

集美大学携手厦门科技局、厦门产业技术研究院共同举办厦门市企业技术需求对接暨集美大学科技成果推介会。

近日，第二届智慧海洋技术与产业发展高峰论坛暨“数字福建”卫星通信与海洋监测物联网实验室挂牌启动仪式在集美大学举行。福建省发展和改革委员会党组成员、“数字福建”建设领导小组办公室副主任陈荣辉和集美大学校副校长谢潮添出席高峰论坛暨挂牌启动仪式，并共同为集美大学“数字福建”卫星通信与海洋监测物联网实验室揭牌。