This is for the only free mini PCI-E slot models, such models are also more common, especially in some international brands of models. With the mini pci-e slot, according to the method of the previous period to add 3G network card and mobile card slots, this time only need to install 3G antenna is done.
Buy Antennas as needed
The price of the notebook antenna is very cheap, the general double price will n
Design and simulate Wireless LAN device antennas
[Date:]
Source: /21IC Author: How Siang Yap and Bart Van Hecke of Agilent EEsof EDA Department
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By adopting polarization diversity technology, low-cost PCB substrates can be used to create Wireless LAN equipment (WLAN) antennas with good receiver performance. This article will describe how to use the latest 3D electromagnetic field (EM) simulation tool to design and simulate a 2.4 GHz orthogon
Zone can be configured separately, its type can be set to FUSC, PUSC, AMC2 × 3, or Sounding. In OFDMA mode, Burst Channel encoding supports CC and CTC.
Supports empty-time Encoding. MatrixA or MatrixB can be used together with the design concept of SMU dual-channel to easily generate two-channel signals with fading emission diversity.
Fading Simulation
To test the performance of WiMAX receivers, especially 802.16e, tests in fading environments are particularly important. SMU200A has a built-in
can be configured separately, its type can be set to FUSC, PUSC, AMC2 × 3, or Sounding. In OFDMA mode, Burst Channel encoding supports CC and CTC.
Supports empty-time Encoding. MatrixA or MatrixB can be used together with the design concept of SMU dual-channel to easily generate two-channel signals with fading emission diversity.Fading Simulation
To test the performance of WiMAX receivers, especially 802.16e, tests in fading environments are particularly important. SMU200A has a built-in Fading
y (n) approximation of the desired signal sequence d (n). The coefficients of the adaptive filter designed with the minimum mean square error can be solved by the Wiener-Hov equation.B. A method proposed by Videro can solve the adaptive filter coefficients in real time, and the results approach the approximate solution of the Wiener-Hov equation. This algorithm is called the least mean square algorithm or LMS method, and it uses steepest descent method, which computes the coefficient vector of
error is calculated from the current moment filter coefficient vector iteration to calculate the coefficient vector of the next moment in KS as a negative number, its value determines the convergence of the algorithm, V "ε2 (n)" as the mean square error gradient estimation, Adaptive filter applied to the field of communication automatic equalization, Echo elimination In addition, antenna array beamforming,
steepest descent method, which is based on the gradient estimation of the mean square error and calculates the coefficient vector of the next moment from the current time filter coefficient vector, and its value determines the convergence of the algorithm.
V"Ε2 (N)" is the mean square error gradient estimation, the adaptive filter is applied in the field of communication automatic equalization, echo cancellation, antenna array
the gradient estimation of the mean square error.
KS in the formula is a negative number, its value determines the convergence of the algorithm, V "ε2 (n)" is the mean square error gradient estimation,
The Adaptive filter is applied to automatic equalization, echo cancellation, antenna array beamforming, and other related domain signal processing parameters identification, noise cancellation, spectral est
data, wireless optimization mainly includes the following aspects in the engineering hardware.
1. Relocation of the base station. The main point is to adjust some unreasonable base station to give full play to the function of the base station and achieve the coverage target. If a base station antenna is in front of a tall building seriously blocked, a base station antenna hanging high, resulting in seriou
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
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
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
article, we mentioned that a user installs a receiving and sending antenna on the office and home roof to communicate with the base station BTS through LOS. In recent years, FWA has made significant improvements in technical design, striving to achieve "Non-line-of-sight transmission" NLOS and Non-LOS ), it is no longer required that the user's receiving and sending antennas must be installed at the high point on the roof, but to allow the antennas t
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
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
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EMI test Project-re radiation emission
In the re test, the height of the antenna, the polarization direction of the antenna and the angle of the turntable need to be constantly changed in order to find the maximum radiation point of the device.
The RE test can be carried out in a semi-electric dark room in an
industrial chain will be transferred to China.
As the frequency band increases, antenna deployment becomes a major challenge in LTE construction. Under the overall deployment policy of TDD/FDD hybrid networking, the network is constantly adjusted to meet the development needs, such as visible coverage, variable region, and dynamic capacity adjustment. The operator hopes to ensure that one deployment of the antenn
In recent years, the increasing demand for mobile data services has promoted the acceleration of LTE network commercialization. Throughout the world, LTE commercial networks are still dominated by lte fdd, but with the gradual development of their networks, users and businesses are increasing, lte fdd network frequency resources, insufficient capacity and other issues will gradually become prominent, and TD-LTE network in the spectrum resources have more resources, can effectively alleviate the
technology of visual distance requires that there must be no obstacle between the sender and the receiver to be visible to each other.
For a network with a visible distance, the problem is that most people have not considered this scattering phenomenon. I have seen many people look out the window, and if they can see the target, they will think that they have a very clear visual distance network. However, as the signal spreads, the signal strength is weakening. If you want to receive all the si
Formula for the relationship between attenuation and distance of Wi-Fi wireless signal transmission [Indoor Location]
Calculation of wireless communication distance1. DBM dbmv dbuv Conversion RelationshipDBM = 10log (pout/1 MW), where pout is the power value in the unit of MWDbmv = 20log (Vout/1mV), where Vout is the voltage value in the unit of MVDbuv = 20log (Vout/1uv), where Vout is the voltage value in the unit of UVConversion Relationship:Pout = Vout × Vout/RDbmv = 10log (R/0.001) + dBm, r
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