技术

Coverage and Interference Mapping

Assessing a signal environment to ensure proper deployment, installation and operation of wireless networks is no easy task. From natural obstructions such as mountains to man-made obstacles like wind turbine generators, signal integrity is one of the biggest concerns for wireless service providers, public safety users, LMR operations and government officials.

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CPRI and OBSAI

Mobile traffic volumes are growing rapidly due to the spread of OTT video services (YouTube, Mobile IPTV, etc.). Consequently, so-called small-cell networks are being deployed to create a better communications environment by expanding available bandwidth per mobile terminal. In densely populated areas, the bandwidth per mobile terminal is inadequate and deployment of multiple small cells supports a better communications environment.

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C-band Deployment and Testing

C-band spectrum is the perfect balance between low and high bands offering a good compromise between coverage and high throughput for 5G cellular networks. C-band frequency can cover wide distances and has expected peak data rates between 600 Mbps and 900 Mbps. Care must be taken to avoid interference with other RF systems in the same bands.

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FirstNet

Public safety professionals need reliable communications to aid them in their lifesaving missions. Many tasks today require broadband services, i.e. when these first responders need to access data-intensive applications, search databases, or share pictures and videos. There is a clear need for rugged, easy-to-use devices designed to meet public safety requirements, as well as provide advanced features and services that enhance their ability to do their jobs.

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Interference Hunting

Interference hunting requires the ability to spot, find and fix a known interferer which is not always an easy task. Not only having the right tools, but the ability to properly identify the issue is key to interference hunting. As strange as it may sound, the first step to solving an interference issue is actually determining that there really is interference. Sometimes there are other issues at play that cause a communications system to work less than optimally but don’t actually involve an outside signal.

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Land Mobile Radio (LMR)

Next-generation public safety communications will more than likely pair narrowband Land Mobile Radio (LMR) networks for voice with broadband LTE networks for high speed data. Ensuring these networks are properly installed and maintained is critical to ensuring mission-critical public safety communication and keeping the public safe. The Anritsu S412E LMR Master is the only solution on the market today that provides a quick, easy, and cost-effective means of verifying the operation of both narrowband LMR and broadband LTE networks, and when necessary, diagnosing problems.

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LTE

安立提供 LTE 测试仪器的完整产品线，能保证您的 LTE 设备和网络的性能和质量。我们的 MD8430A 信令测试仪是第一个完整的

LTE- Advanced 基站模拟器，配合上 MF6900A 衰落仿真器，能提供可重复和衰落仿真环境，这对于评估 LTE- Advanced 的性能是非常重要的。我们的信号分析仪能提供完整的 LTE 上行和下行信号分析，而且仪器既有信号分析功能又有矢量信号源功能。使用我们的矢量信号源，能产生可重复的 LTE 信号，而且我们的 LTE IQproducer 软件提供了便于操作的图形界面，操作者可以容易的生成 LTE 波形文件。

TDD/FDD 相关
LTE 标准同时支持时分双工 (TDD) 和频分双工 (FDD)，有相同的空中接口。

MIMO
多入多出 (MIMO) 是信号处理和天线技术的融合，不仅能增加无线通信的容量 (空间多径技术) 还能增大信噪比 (发射分集技术)。

LTE 使用 2x2/4x2 的空间多径配置，用户数据被分成两部分，每部分都使用两个 / 四个天线发出，并用两个天线接收。因为多径效应，每部分数据经过了不同的 RF 路径有不同的衰落特性。在算法上，分开又合并数据使得系统得以独立使用两条不同的路径，可以提高吞吐率。两路数据流同时占用相同的 RF 路径，可以使空口的最大数据率翻倍。

当使用 MIMO 发射分集，同样的用户数据被两个天线发出，对于每个接收端，相当于收到重复信号。这样提高了信噪比，增强了信号鲁棒性。

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Passive Intermodulation (PIM)

PIM is a growing issue for cellular network operators. PIM issues may occur as existing equipment ages, when co-locating new carriers, or when installing new equipment. PIM can create interference that will reduce a cell’s receive sensitivity or even block calls. This interference can affect both the cell that creates it, as well as other nearby receivers.

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Remote Spectrum Monitoring

Interference detection and spectrum monitoring is used to characterize spectrum occupancy. Using a spectrum monitoring system facilitates the identification and removal of illegal or unlicensed interference signals. By monitoring spectrum on a continual basis, problem signals can be identified as they occur in real time.

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Shockline NLTL

Nonlinear Transmission Line (NLTL) technology has historically been used for pulse shaping applications and in digitizing oscilloscopes. Over the years it has proven itself to be a highly credible, robust technology. It has been refined by Anritsu for high-frequency use, and complemented with novel monolithic broadband directional bridges, multiplexers, and other key components.

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Signal Integrity

Today's signal integrity engineers are challenged to meet high data rates, due to increasing demand for data generated from cloud computing, smart phones and LTE services. The need to minimize costs, and close the loop of simulation and measurement are essential. Fortunately the latest Vector Network Analyzer and Signal Quality Analyzer technologies can provide a solution to these challenges.

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WiMAX

无线通信系统正变得越来越复杂，使用更高频率和更大带宽，以支持高速通信，IEEE802.16 WiMAX就是一个例子。

 

当开发WiMAX设备时，工程师必须保证其工作在高频的WiMAX频段。在制造阶段，设备必须要经过测试。一旦安装运行后，WiMAX发射和接收设备又面临着天线和发射器件调谐以及无线电干扰等挑战。

 

以上这些情况要求新一代的WiMAX测试仪器，能应对WiMAX的高频率和宽带特性，而且要能支持不同区域中WiMAX设备的特性和不同频率。

 

在WiMAX市场中安立的角色

安立是无线通信设备的研发、综测、制造、维护仪器供应商中的领跑者。安立承诺提供WiMAX的完整解决方案，保证WiMAX设备商和运营商紧跟最新的标准，并能将产品更快投入市场。

 

安立是WiMAX论坛的活跃成员，产品在TWG（技术工作组）和Plugfests(互通测试)中展示。其中，MG3700A矢量信号源和MS2781B矢量信号分析仪被列入推荐产品目录

 

此区域设计为一站式选择WiMAX测试仪器，用于移动、固定WiMAX基站和天线安装以及后续维护工作。这里您能找到新闻，技术文档，在线学习，和安立的最新产品。将本页面添加为书签！

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