network. For this reason, before placing wireless internet nodes or wireless router devices, we should make a rough estimate of the number of users of wireless Internet access, and ensure that many wireless internet users can be evenly connected to different wireless access devices. Make sure each one of them is able to surf the internet efficiently and wirelessly. focus on the antenna position under normal circumstances, wireless internet nodes
is very low, it may take more than 10 times times the weight. 18650 the other advantage of the battery is a lot of kinds, for example, when you need to the cold area, you can change the low-temperature battery, you can work in the 零下40度 environment. Instead of Conte like the iphone, it's completely impossible to use. )
2, the mobile phone's GPS performance should be good enough, have a separate external GPS antenna, so that in the woods and heavy ra
The construction of 3G mobile network is a complex project, considering all kinds of factors, also need to deal with the emerging problems, so technology and experience are equally important. Alcatel Shanghai Bell by virtue of its strong in the field of telecommunications research and development strength and accumulated many years of experience in the field, will be in the future 3G network construction to assist operators to complete the construction goals, and jointly create a new phase of mo
fragile paper.
14. Fixed speaker Structure
The volume of a mobile phone is a strong selling point, which puts forward higher requirements for the speaker. in addition to requiring the solution company to tone the speaker itself to the best state, the speaker's sound cavity structure should also pay attention to the following points:
A. the front sound of the speaker must be closed. if the horn works directly with the shell, the ring foam must be closed between the horn and the shell, and the
performance a Wi-Fi system can achieve. The higher the SINR value, the higher the data transfer rate, and the greater the spectral capacity.
Figure: SINR is an important indicator for determining the performance of Wi-Fi systemsIn order to obtain a higher SINR indicator, Wi-Fi systems must be achieved by increasing signal gain or reducing interference. The problem is that traditional Wi-Fi systems can only increase the signal strength in a direction by increasing power or by erecting hi
difference between the level of signal and the level of interference. Because it reflects the negative impact of RF interference on user throughput, SINR is a better indicator of what performance a Wi-Fi system can achieve. The higher the SINR value, the higher the data transfer rate, and the greater the spectral capacity.
Figure: SINR is an important indicator for determining the performance of Wi-Fi systemsIn order to obtain a higher SINR indicator, Wi-Fi systems must be achieved by i
Shared Library)
11. Run install_software: #./install_software, enter Y twice as prompted, modify makefile. config, and modify a set of parameters in Makefile. config in/opt/gamit/libraries.
(1) MAXSIT 55, MAXSAT 32, MAXATM 25, and MAXEPC 5760
(2) # Specific to FC5 (F6, F7, F8)
Then, enter "Y" twice to complete the installation;
12. After installation, open the terminal and enter doy to check whether the program is correctly installed.
(Note: After the installation is completed under the root us
MIMO technology can be used as a bridge to connect old and new wireless technologies, so that the two can develop and integrate harmoniously. So it is already an important technology in the next generation of wireless broadband mobile communication systems. The following will give you an in-depth analysis of its development.
MIMO technology has become one of the key technologies in the wireless communication field. However, it is a huge challenge in the industry to reduce the algorithm complexit
the body (MINI-PCI or mini pci-Express) and a preset antenna. In this way, you only need to purchase the wireless network card of the corresponding interface and connect the antenna. If you have an expansion slot (MINI-PCI or mini pci-Express) that is not cabled, you can also install and use the antenna after purchasing it.
There are two types of expansion slots
In most home environments, only one router is used for wireless network coverage, a single wireless router has limited coverage, and wireless signals in some areas may be weak or cannot be found.
This article describes how to enhance the coverage effect of a single wireless router.
If the housing space is not open enough, there are partitions, walls and other obstacles, will lead to wireless signal penetration attenuation is too large, the scope of the coverage is gre
will also increase. Currently the international regulation of the maximum launch power of 20DBM (or 100MW), but now the market most of the products are not up to this value, we are in the choice of course the closer the better.
Wireless Router selection standard 3, antenna gain
Wireless products are mostly antennas, this antenna can be good or bad for wireless products have a direct impact on the selecti
ordinary users 54M products can fully meet the needs of the Internet.
2. Transmitting power:
We know that the unit of measure of power is watt. In the same way, wireless devices also use transmitting power to measure the performance of the transmitter. The unit of measurement for transmitting power is dbm or MW. Like the relationship between the brightness and wattage of a light bulb, the transmission distance of the wireless device is also connected with the transmit power. With the increase
. Extended antenna enhancement Signal
Because the antenna gain size directly affects the signal transmission strength and receiving capability, some routers on the market use detachable antennas, therefore, replacing a high-gain antenna with a wireless router is the most direct method to enhance the signal. The gain antenna
electromagnetic interference to wireless networks when working, so the placement of wireless routers should also be as far away as possible.
3. Extended antenna enhancement Signal
Because the antenna gain size directly affects the signal transmission strength and receiving capability, some routers on the market use detachable antennas, therefore, replacing a high-gain
1. DBMDBM is the absolute value of power. The formula is: 10lgp (power value/1 MW ).[Example 1] If the transmit power P is 1 MW, it is converted to dBm and then 0dbm.[Example 2] for 40 W power, the converted value in dBm unit should be:10lg (40 W/1 MW) = 10lg (40000) = 10lg4 + 10lg10 + 10lg1000 = 46dbm.
2. DBI and DBDDBI and DBD are the obtained Gain values (power gain). Both are relative values, but the reference standards are different. The reference of DBI is a full-direction
relaxing. The middle of the front-row central armrest is placed in the middle of the front-row seat, while the majority of the back-row central armrest is a foldable armrest, placed in the center of the back-to-back.
●Body Color
It is the color of the vehicle body painted at the factory. We usually divide the color of the body into three categories: monochrome, two-color, and color trim. Currently, most cars are in a single color (also called the same color), while Mini and smart cars are in
receives the digital signal to receive the D/a transformation, becomes the analog signal.
Bluetooth module BRF6100
Bluetooth signal transceiver is realized by Bluetooth module BRF6100. BRF6100 is the TI company recently introduced to follow the Bluetooth V1.1 standard wireless signal transceiver chip, its upgrade model BRF6150 support V1.2 Standard, BRF6100 main features are: Digital wireless processor in-chip DRP (Digitalradioprocessor), CNC oscillator, Chip RF transceiver switch switch, bui
channel. This frame structure is subdivided into several time slots. In the TDD mode, it is easy to switch between the upper and lower links flexibly. The salient advantage of this pattern is that the time slot allocation between the top/downlink links can be changed by a flexible conversion point to meet different business requirements. In this way, using TD-SCDMA technology, all 3G symmetric and asymmetric services can be realized by changing the switching point of the upper/down link flexibl
think that dbm is the maximum value of 0, meaning that the receiver of the transmitter launched all the wireless signal received, that is, the wireless router fired how much power, the reception of the wireless network card to obtain how much power. Of course, this is measured in an ideal state, in practice, even if the wireless network card next to the wireless router transmitter antenna will not achieve the effect of dbm 0. So the measured dbm val
one, human factors
The distance between the wireless router and the network card is too long, in this case can only be solved by a different configuration of the appropriate antenna.
The wireless router and the network card have the obstacle influence, sometimes also can cause the disconnection breakdown, for instance the indoor complex environment, the wall, the furniture influence. So try not to go through walls over three floors as much as possib
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.