qam antenna

router until you hear a "click" of a network card. Now that the "one wireless router" and "one broadband network cable" have been successfully connected, the process of installing the wireless router has already been completed, and then let us know about the wireless router. In addition to what we have just mentioned, wireless router, a number of network cable interface, a wireless router also has a power interface, as a network equipment, wireless routers need independent power supply, that i

When the router is published, there are some technical terms, such as 802.11AC, 5G, gigabit, dual frequency, 2*2 antenna, Wi-Fi, and also the conclusion that "10 times times Faster", "Top Configuration", "Global X". Under the manufacturer propaganda, some people think that the product is good to be bad, also some people think the manufacturer is bragging x. This article is the wireless router knowledge popularization, each followed by a selection of s

, the entire system is typically a wireless system, such as the Code division used in multiple antenna systems, 3G mobile phone systems (wireless systems) multiple Access (CDMA) systems, even DSL systems (wired systems) that generate crosstalk (crosstalk) using multiple phone lines. This paper will first introduce the history background and operation of MIMO, and discuss the extent to which MIMO can extend WLAN transmission range. The development pr

sources to interfere, which naturally causes the WLAN transmission speed slows down. In addition, wireless network transmission distance is limited, although the general wireless router nominal transmission distance can reach 100~300 meters, but in the actual use if there is a barrier, this distance will be shortened dramatically and will lead to slow data transmission speed. Knowing the slow speed of transmission, we can begin to solve the problem with a targeted approach. First in the layout

sources to interfere, which naturally causes the WLAN transmission speed slows down. In addition, wireless network transmission distance is limited, although the general wireless router nominal transmission distance can reach 100~300 meters, but in the actual use if there is a barrier, this distance will be shortened dramatically and will lead to slow data transmission speed. Knowing the slow speed of transmission, we can begin to solve the problem with a targeted approach. First in the layout

the RF signal of the radio transmitters output is transmitted to the antenna via a feeder (cable) and radiated out by the antenna in the form of electromagnetic waves. When the electromagnetic wave arrives at the receiving location, it is received by the antenna (only a small fraction of the power is received) and sent to the radio receiver via the feeder. Ther

1. Wireless Networking Networking requirements: Establish a network without a line in the LAN to share resources among devices. Networking Mode: place a wireless access point in the LAN center and add a wireless network card to the Internet device. 2. Point-to-point connection ① Wireless connection between a single machine and a computer network Networking requirements: achieve wireless connection between remote computers and computer network centers Networking Mode: Add a wireless access point

occur, reducing its transmission range. Therefore, do not hide a wireless router in the corner of the room, or bury it in the basement or in the shelve, instead, try to place the wireless router in the center of your wireless activity. For the duplex room, try to place the wireless router in the center of the room So how can we identify such a central location? In fact, the simplest way is to observe through your line of sight, that is, where you can see the most room scenarios, then this

Wireless LAN technology has become the focus of all people, so what are the different requirements and instructions for wireless network networking methods? There is a networking method suitable for you through the following introduction. Wireless Networking 1 wireless networking Networking requirements: Establish a network without a line in the LAN to share resources among devices. Networking Mode: place a wireless access point in the LAN center and add a wireless network card to the Internet d

the analog user access part hinders the development and forms the bottleneck effect. In this case, xDSL technology appears. At present, XDSL mainly refers to three kinds of HDSL, ADSL and VDSL.2.1, HDSL TechnologyDSL (digtal subscriber lines, digital Subscriber line technology) is the product of the late 80, mainly used for ISDN basic rate service, on a twisted pair to obtain Full-duplex transmission, using the technology is time compression multiplexing (TCM) and echo cancellation. However, cr

backplane capacity exceeding 1Gbps. CMTS allows cable operators to establish high-density and highly adjustable termination systems for their data-over-cable (DoC) services. The core module of CMTS is cable Access Router, which provides routing connections from the Internet or from the internal backbone data network to the RF (CATV) network. By working in conjunction with the QAM modulator (downlink module), if output can be provided in a 6MHz and MC

O-OFDM System Structure 1 is shown. The original binary sequence is mapped to N parallel sub-carrier channels through string/and conversion. At this time, the data cycle of each modulated sub-carrier is expanded to N times that of the original sequence, latency expansion and the numeric ratio of the symbol period are also reduced by N times. After the QAM modulation is performed on the sequence of each sub-carrier channel, the Fourier inversion IFFT

and demodulation techniques are described below.Quadrature amplitude Modulation (QAM)In modern communication, it has been one of the focus of attention to improve the spectrum utilization. Quadrature amplitude modulated QAM (quadrature amplitude modulation) is a kind of modulation method with high frequency spectrum utilization, which has been widely used in medium and large capacity digital microwave comm

requirements. The ISO15693 standard complies with the library industry standards. Advantages: good security and anti-counterfeiting performance; can be used on books, CDs, and tapes; fast read/write speed without interference; can be read at the same time; applicable: various media books, tapes, and CDs); 2. intelligent Security Detection System 1) function description checks whether any missing books are taken out, and provides sound and lighting alarm functions. Technical SpecificationsMechan

erection cost is not as high as that of wired LAN, the successfully deployed wireless LAN can be easily changed in the future. More importantly, the expansion of the wireless LAN network is very good. For example, it can be compatible with various network connection interface standards, supports and complies with all communication protocol standards. For common access users, it is almost a completely transparent link that can meet the access needs of various client systems. With the help of Wir

Wireless LAN technology is becoming more and more mature, but many people are not clear about the wireless LAN networking method. Here we will summarize some specific methods for you to learn. Wireless Networking 1 wireless networking Networking requirements: Establish a network without a line in the LAN to share resources among devices. Networking Mode: place a wireless access point in the LAN center and add a wireless network card to the Internet device. 2-point-to-point wireless networking ①

There are many networking methods for wireless networks. which method is suitable for our work environment? Here we will give a detailed description of the networking requirements. Many of us are not clear about the typical networking methods of Wireless LAN, But what operations should we do? The following describes several typical methods. I believe this article will be helpful to you. Wireless Networking 1 wireless networking Networking requirements: Establish a network without a line in the L

Q: No line from the living room, but in the bedroom signal is relatively weak, what is the solution? A: No line by the signal strength and the route itself, the receiver's wireless network card, the use of distance, the middle interval of the number of load-bearing walls, and so on, and even with the neighbor's home without the number of lines are also related. Method One: Antenna gain Normally, no line from through a load-bearing wall

wireless network card between the best to see, as far as possible to avoid the wall between them, especially the load-bearing wall (reinforced concrete wall). We know that in order to reduce the radiation on the human body, the power of the wireless router is generally small, so the use of the process is very much in the vicinity of electronic equipment interference, so in the setting of wireless router placement, we must remember to stay away from microwave ovens, refrigerators and other house

, configuration, frequency point, latitude and longitude, antenna height, antenna gain, antenna half power angle (vertical and horizontal), azimuth, elevation, base station type, etc. Prepare a map indicating the station number, frequency point, BSIC, and azimuth (antenna direction), and record the current system versi