qam antenna

The following is a small series for everyone to collect the "No line by the knowledge misunderstanding" all content, if you like small series of recommendations, please continue to pay attention to learning. More antennas, better routing? "The more the antenna coverage, the more the antenna more signal stronger, in short, the more the antenna routing is better

a waveform (high-order modulation). So there is a question that I do not know 0 corresponds to what waveform, 1 corresponds to what waveform, is because did not understand the modulation process.after using such as QAM64 modulation, the symbol that comes out is plural., which is also the origin of the plural signal. The general article treats a symbol as an input and discusses the following steps, and I'm going to talk about orthogonality from sin and cos, so I see a symbol as two real numbers

I. Test conditions The beacon tower method is also known as the conventional far-field method. It is a common method to test the antenna pattern in the conventional field. This is the simplified frame of the antenna tested by the standard tower method. In the conventional far-field method test [20], to ensure the test accuracy, the following test requirements should be met: 1) the distance between the rec

a common copper cable U1C and a U1R reference point. VTU-O and VTU-R are the VDSL transceiver located at the local end and the user end, respectively. The service Splitter, including HPF and LPF, separates the VDSL transmitted on the same pair of telephone copper cables from the narrowband service or ADSL. VDSL uses a wide spectrum, up to 12 MHz. The spectrum range can be divided into several downlink DS and uplink US frequencies. Commonly Used frequencies in the world are Plan997 and Plan998,

data connection Performance drops. The beauty of modern Wi-Fi devices is that they can be used together, so you can build networks with the best devices of the same type. For example, my network uses routers from one manufacturer, antennas from another manufacturer, printing services from a third manufacturer, and wireless customer devices from several different companies. You can think of it as a wireless United Nations: global cooperation makes your online life easier. Placement: Location, lo

Faults are also emerging during the use or maintenance of wireless networks. Here we will introduce you to several detailed fault instances. The following articles will explain in detail. The operating frequency of a wireless LAN (WLAN) is generally 2.4 GHz and belongs to the category of microwave communication. The transmission feature is linear and visible, that is, visual communication and contact methods. This shows that rain, fog, walls and other obstacles can affect the transmission qualit

1 Introduction The mainstream standard wcdma/td-scdma/cdma2000 of the third generation mobile communication system adopt the Code Division Multiple access method, CDMA Code division multiplex System is a disturbance restricted system, in the transmission of information, there are multiple access interference, multipath interference and far-near effect. Any technology that can improve the anti-jamming performance of the system can improve the capacity of CDMA system, in this paper, the key anti-

This article only applies to tl-wa5210g, tl-wa7210n, tl-wa7510n. Our outdoor high power AP Built-in vertical and horizontal two antennas, you can use the environment and installation methods to adjust the type of antenna. In the wireless AP management interface, click Wireless Settings >> Wireless Advanced Settings , you can set the antenna type, the following figure: As d

user communicates with a PSTN user, the IAD user accesses the IP bearer network through the WIMAX wireless link, which is controlled by the media gateway controller Huawei SOFT3000) and sends the media stream to the integrated media gateway Huawei UMG8900 ), UMG8900 and PSTN Programmable switch Huawei CC08) have a direct circuit to complete communication. When IAD users perform voice communication, they are controlled by the media gateway controller Huawei SOFT3000) and communicate through the

In the cellular mobile communication system, the antenna is the converter of the circuit signal and the space radiation electromagnetic wave, and is the key component of the mobile communication system.From 2G to 4G, the mobile base station antenna has undergone omnidirectional antenna, directional single-polarized antenna