分类：其它    下载：0    浏览：63    时间：2026-01-28

Abstract—With the emergence of 4k/8k video, the throughput requirement of video delivery will keep grow to tens of Gbps. Other new high-throughput and low-latency video applications including augmented reality (AR), virtual reality (VR), and online gaming, are also proliferating. Due to the related stringent requirements, supporting these applications over wireless local area network (WLAN) is far beyond the capabilities of the new WLAN standard – IEEE 802.11ax. To meet these emerging demands, the IEEE 802.11 will release a new amendment standard IEEE 802.11be – Extremely High Throughput (EHT), also known as Wireless-Fidelity (Wi-Fi) 7. This article provides the comprehensive survey on the key medium access control (MAC) layer techniques and physical layer (PHY) techniques being discussed in the EHT task group, including the channelization and tone plan, multiple resource units (multi-RU) support, 4096 quadrature amplitude modulation (4096-QAM), preamble designs, multiple link operations (e.g., multi-link aggregation and channel access), multiple input multiple output (MIMO) enhancement, multiple access point (multi-AP) coordination (e.g.,multi-AP joint transmission), enhanced link adaptation and retransmission protocols (e.g., hybrid automatic repeat request (HARQ)). This survey covers both the critical technologies being discussed in EHT standard and the related latest progresses from worldwide research. Besides, the potential developments beyond EHT are discussed to provide some possible future research directions for WLAN. Index Terms—IEEE 802.11be, EHT, Wi-Fi 7, Multi-link Operation,Multi-AP Coordination, MIMO Enhancement, HARQ.

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Albert Chung Senior Application Engineer Rohde & Schwarz Taiwan WIFI7技术介绍

分类：其它    下载：0    浏览：48    时间：2026-01-24

Abstract—While the pace of commercial scale application of Wi-Fi 6 accelerates, the IEEE 802.11 Working Group is about to complete the development of a new amendment standard IEEE 802.11be – Extremely High Throughput (EHT), also known as Wi-Fi 7, which can be used to meet the demand for the throughput of 4K/8K videos up to tens of Gbps and low-latency video applications such as virtual reality (VR) and augmented reality (AR). Wi-Fi 7 not only scales Wi-Fi 6 with doubled bandwidth, but also supports real-time applications, which brings revolutionary changes to Wi-Fi. In this article, we start by introducing the main objectives and timeline of Wi-Fi 7 and then list the latest key techniques which promote the performance improvement of Wi-Fi 7. Finally, we validate the most critical objectives of Wi-Fi 7 – the potential up to 30 Gbps throughput and lower latency. System-level simulation results suggest that by combining the new techniques, Wi-Fi 7 achieves 30 Gbps throughput and lower latency than Wi-Fi 6. Index Terms—IEEE 802.11be, Wi-Fi 7, timeline, feature,throughput, latency.

分类：其它    下载：0    浏览：42    时间：2026-01-24

Abstract—Last years we have witnessed the uprising of location-based applications, which depend on the device’scapabilities to accurately obtain their position. IEEE 802.11, foretelling the need for such applications, started the IEEE 802.11az work on Next Generation Positioning. Although this standard provides positioning enhancements for sub-6 GHz and mmWave bands, high accuracy in the order of centimeters can only be obtained in the latter band, thanks to the high temporal resolution from the multi-GHz bandwidth. This work presents the new techniques provided by IEEE 802.11az for enhanced secured positioning in the mmWave band. Additionally, this paper assesses 802.11az mmWave accuracy using a novel trigonometry solution, compares it with advanced positioning solutions, and identifies open research challenges. Index Terms—IEEE 802.11 standard, Next Generation Positioning, FTM, EDMG, mmWave

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IEEE 802.11 DCF协议性能分析模型 钟萍, 施海彬, 庄玉祥, 石江宏, 陈辉煌 厦门大学信息科学与技术学院, 福建厦门361005 摘要： 提出了一种改进的二维Markov链模型用于分析IEEE 802.11 DCF协议. 该模型不仅考虑实际应用中饱和业务量和非饱和业务量的情况，而且考虑DCF协议的退避计时器的冻结状态和有限的重传次数. 通过对该Markov链模型稳定状态的求解并结合M/M/1/K排队模型，导出了DCF系统性能的理论模型. 仿真结果表明，该理论模型能够精确地预测广义IEEE 802.11 DCF协议的系统性能. 关键词: 无线局域网, IEEE 802.11, 分布式协调功能, Markov链模型 Abstract: This paper proposes an improved two-dimensional Markov chain model for the performance analysis of the IEEE 802.11 DCF protocol. The model is applicable to both saturated and unsaturated traffic conditions. Moreover, it extends the existing models to take into account previously-ignored MAC layer factors such as backoff freezing and limited times of retry. In addition, by deriving the stationary state of the Markov model and considering an M/M/1/K queuing model, we further derive a theoretical model for evaluating performance of the general IEEE 802.11 DCF protocols. Accuracy of the proposed theoretical model is validated with simulation results. Key words: wireless local area network, IEEE 802.11, distributed coordination function, Markov chain model

分类：其它    下载：95    浏览：5881    时间：2020-08-08

X7.0固件允许用户设置自己的功率，且默认是全区域，所以我们不开放区域设置，因为各个国家地区的最大允许功率定义不一致，导致设置逻辑混乱。 用户通过拉动功率滑动条可以自由调整功率大小，左侧列表是滑动条百分比对应的不同功率，用户可以根据自己实际情况进行选择。 拉动功率后可以通过命令 wl txpwr_target_max 来查看功率，需要注意的是，此处打印的是2.4G的功率。 X7.0固件最大允许设置28.5dbm（708mw）功率，但是为了保守起见，滑动条最大能设置到27dbm（500mw），如果希望手动设置超过500mw的功率，你需要在webshell或者ssh/telnet终端内输入以下命令（以开启708mw为例子，120为内部参数，次命令仅对网件机型有效，华硕机型请勿使用） #设置2.4G功率 nvram set pci/1/1/maxp2ga0=120 nvram set pci/1/1/maxp2ga1=120 nvram set pci/1/1/maxp2ga2=120 #设置5G功率 nvram set pci/2/1/maxp5ga0=120,120,120,120 nvram set pci/2/1/maxp5ga1=120,120,120,120 nvram set pci/2/1/maxp5ga2=120,120,120,120 #保存设置 nvram commit service restart_wireless

分类：其它    下载：0    浏览：1123    时间：2017-09-28

信锐定位接口说明

分类：其它    下载：0    浏览：819    时间：2017-09-03

比较简单。 一、市场分析 二、目标定位 三、推广计划 四、收益预算 五、产品优化

分类：其它    下载：1    浏览：868    时间：2017-08-24

目录 WiFi技术及行业概况 中国WiFi行业发展状况 WiFi行业商业模式分析 WiFi行业发展趋势

分类：其它    下载：14    浏览：1147    时间：2017-08-19

国外大牛制作的射频计算表格，涉及线缆、传输等10多种计算表。只是英文的，使用起来稍为不顺，原想翻译中文的，但作者加了很多修改限制，而且好多数据是引用隐藏表格的，改后出错较多，也出于尊重作者还是直接提供给大家吧。 Attenuators Bandpass Filters Cascaded Components Coils / Inductors Delta-Wye (Resistors) Directional Couplers Doppler Shift Highpass Filters Lowpass Filters Mixer Frequency Conversion Near / Far Field Noise Figure↔Temp Path Loss, 1-Way Path Loss, 2-Way Propagation Time Radar Blind Speed Radar Horizon / Line of Sight Rectangular Cavity Skin Depth Smith Chart VSWR↔RL↔Gamma Voltage Divider Voltages & Power - Vrms, Vavg, Vpk

分类：其它    下载：0    浏览：1007    时间：2017-08-15

胡 诚1,2, 汪 芸1,2, 王 辉1,2 1(计算机网络和信息集成教育部重点实验室(东南大学),江苏 南京 211189) 2(东南大学 计算机科学与工程学院,江苏 南京 211189) 摘 要: 传感器网络作为当代信息获取的重要手段之一,受到各国各界的广泛关注.在传感器网络中,能量问题一直是限制其广泛应用的重要约束和挑战.由于无线充电技术和智能移动节点的发展,使得综合使用这两种技术能够彻底解决传感器网络中的能量问题.这类采用无线充电方案的传感器网络称为无线可充电传感器网络.其中,充电规划影响无线可充电传感器网络在解决能量问题时的成本和效果,因此成为研究的热点.综述了最近几年无线可充电传感器网络研究中充电规划设计,从软、硬件层面的6 个不同维度对这些方案进行分类概述和对比分析,总结在不同应用场景下进行充电规划设计的一般性思路,并通过3 个实例进行演示,验证该设计思路的易用性和实用性. 关键词: 无线可充电传感器网络;移动充电节点;服务站节点;充电规划;充电方案

分类：其它    下载：5    浏览：1108    时间：2017-08-14

专题导读 无线传感器网络（Wireless Sensor Network, WSN）是信息感知和采集的一场革命，将给人类的生活方式带来颠覆性的改变。2003年美国《商业周刊》将无线传感器网络列入四大新技术之一，美国《技术评论》将无线传感器网络列为未来新兴十大技术之首。 无线传感器网络经过四代的发展，综合了通信技术、嵌入式计算技术、分布式信息处理技术和传感器技术，使机器具备触摸世界的皮肤，使机器具备灵魂！无线传感器网络使人们Anywhere&Anytime都能获取详实、可靠的信息，实现“无处不在的计算”梦想，它在国防军事、环境监测和医疗卫生等领域具有庞大的生命力。 无线传感器网络让Anywlan的梦想——随时随地无线——不只是一个美丽的梦，它是将在未来如此真实地存在着——在每个人的身边。将它作为本月专题，翼望促进无线传感器网络技术的发展和普及，实现人类生活的革命。本专题涵盖无线传感器网络研究领域的主要方向，包括无线传感器网络的通信协议、节能管理、数据管理、安全性与可靠性等。 本专题所在贴：https://www.anywlan.com/thread-5827-1-1.html