Research and Implementation of the PHY Error Control Mechanism on Broadband Wireless Ad Hoc Network

无线自组织网是一组自治的无线节点相互协作而形成的独立于固定的基础设施并采用分布式管理的网络。由于它具有组网灵活、容易实现等优点，在军事通信、应急通信等方面有广阔的应用前景。宽带无线自组织网是一种无线通信和计算机网络相结合的网络，它的应用环境复杂，信道误码率高，数据传输速率高，实时性好，要求有较高的可靠性。因此相对于一般通信系统，有效的差错控制方案对于宽带无线自组织网而言显得更为重要。 CTC与Turbo码相比具有编码效率高，相同复杂度译码器下纠错性能好，译码迭代次数少，译码时延小等优点，同时消除了尾比特对译码性能的影响。文中通过仿真验证，得到译码迭代次数相同时，CTC的性能略优于Turbo码...Wireless Ad Hoc network is a kind of peer-to-peer network. With the advantages of network flexibility and easy realization, it has bright prospects in military communications, emergency communications, etc. Wireless Ad Hoc network incorporates wireless communications networks and computer networks. Compared with the general communication system, more effective error control scheme is required in b...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2332007115218

Design of USB host controller

讨论在SOPC(SySTEM On A PrOgrAMMAblE CHIP)系统中设计uSb主机接口设备的一般方法,着重阐述主机控制器的驱动程序开发。利用XIlInX公司的Edk软件在Ml405开发板上搭建一个基于POWErPC的片上系统,设计Ez-HOST的uSb主机控制器的lInuX驱动程序,使系统具有uSb主机功能,能够和各种uSb设备进行通信,实现SOPC系统上基于lInuX的uSb接口的扩展,对于开发其他uSb主控制器驱动具有一定借鉴意义。The general development method of USB host interface based on SoPC system is discussed,and the driver program development of host controller is introduced in detail.A PowerPC-based system on chip is built up by using Xilinx′s EDK software in the ML405 development board.Linux driver program of USB host controller of EZ-Host is designed.The system is capable of communicating with a variety of USB devices,achieves extension of the Linux-based USB interface.The design is helpful to the development of other USB host drivers.福建省重大专项项目(2007HZ0003

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies