ofdm modem

is no error, the control information is removed and sent to the Data Link Layer LLC sublayer.6.WiMAX and OMA, TR069From the protocol stack defined by the three, WiMAX focuses on the bottom part of the protocol, which is closely related to the wireless network equipment, that is to solve the problem of how to send data and receive data by wireless network equipment. The protocol stack for OMA and TR069 is defined in the Transport layer (TCP or WDP), the session layer (HTTP or WSP), the presentat

This article describes in detail the origins of the ultra-wideband wireless access technology, developed from the wireless UWB technology, that is, the pulse radio technology. It is used in a broader field and is integrated with our daily lives. It not only facilitates entertainment and work. Ultra-Wideband Wireless Access Technology According to the problems of serious narrowband interference and average power ratio of MB-OFDM signal in ultra-wideba

Frame Structure LTETwo supported wireless frames Type 1: applied to FDD Type 2: Used In TDD FDDWireless Frame Structure The FDD wireless frame length is 10 ms, as shown in. Each frame is divided into 10 sub-frames of the same size. Each sub-frame is divided into two time slots of the same size, that is, each FDD wireless frame contains 20 time slots of the same size, each time slot is 0.5 ms. In a common CP configuration, a time slot contains seven consecutive

Whdi (Wireless home Digital Interface, the Wireless Family Digital Interface) sets a new standard for wireless high-definition video connectivity. It provides a high quality, uncompressed wireless connection. The MIMO technology and the OFDM modulation method can achieve up to 3Gbps transmission speed. Working in the 4.9ghz~5.875ghz band, 20MHz or 40MHz channels, in line with the global 5GHz spectrum, the range is within 30 meters, can penetrate the

Zhongxing 831ADSL Modem How to set 831:First, 831 of the built-in software brush to 2. 79 version, can www.zte.com.cn download (how to brush in the description inside)831 the factory set Ethernet port IP address is 192. 168. 1. 1, in order to be able to use Telnet access to 831, we now set the address of a computer to 192. 168. 1.*, using ping 192.168.1.1 to see if you can access to 831, no problem continue, in DOS mode into Telnet 192.168.1.1, if you

ZTE 831 adsl modem Set 831:First, we need to refresh the 831 built-in software to 2. Version 79, which can be downloaded at www.zte.com.cn (how to click here)831 the IP address of the factory Ethernet port is 192. 168. 1. 1. In order to access 831 via telnet, we should set the address of a computer to 192 first. 168. 1. * Run ping 192.168.1.1 to check whether the access Traffic reaches 831. If no problem persists, run telnet 192.168.1.1 in DOS mode.

Customer Service Hotline 10000 Telecom (10060 Netcom/10050 tietong) to report the obstaclesThe bandwidth connection error 678 (remote computer does not respond) is handled as follows:Step 1: Check whether the MODEM signal is normal and restart the modem normally. For more information, see Step 2.Step 2: Check whether the user has any firewall or 3721 netassistant software. If yes, it is recommended that th

: Uninstall clean any PPPoE software and reinstall.Error 606 The port is not connectedProblem: The Dial-Up Networking network cannot connect to the required device portsCause: Raspppoe not complete and correct installation, connection line failure, ADSL Modem faultFIX: Uninstall clean any PPPoE software, reinstall, check the network cable and ADSL MODEM.Error 608 The device does not existProblem: A dial-up network connection device does not existCause

clean any PPPoE software and Reinstall.Error 606 The port is not connectedProblem: The dial-up Networking network cannot connect to the required device portsCause: Raspppoe not complete and correct installation, connection line failure, ADSL Modem faultFix: Uninstall Clean any PPPoE software, reinstall, check the network cable and ADSL MODEM.Error 608 The device does not existProblem: a dial-up network connection device does not existCause: Raspppoe

Chapter 4 Reuse Frequency Division Multiplexing Time division multiplexing Synchronous time division multiplexing Statistics time division multiplexing Asymmetric Digital user line Chapter 4 Reuse Efficient use of high-speed data communication links-Reuse The capacity of a single data link can be shared by multiple information sources. Reasons why reuse is widely used The higher the data rate, the higher the cost-effectiveness of transmission facilities. Most data communicat

FHSS or DSSS 2 Mbps 802.11a 5 GHz OFDM 54 Mbps 802.11b 2.4 GHz HR-DSSS 11 Mbps 802.11 GB 2.4 GHz OFDM 54 Mbps 802.11n 2.4 or 5 GHz OFDM 540 Mbps theoretical value) Wireless Network Protocol 1. Traditional 802.11 19

WiMAX Overview World wide (WiMax) is a wireless transmission technology based on the IEEE 802.16 standard. As the "last mile" technology connecting users, WiMax is developed to replace broadband wired networks such as DSL and support mobile broadband wireless access, it uses OFDM transmission technology for NLOS connections, providing a data rate of up to 75 Mbit/s. The IEEE 802.16-2004 physical layer is divided into two modes:

SMS Communication and CMS errors 1. How to establish communication with the GSM Modem2. Do not communicate with the GSM Modem normally or there is always garbled code on the simulation terminal.3. How to know the error code4. After a short messa

Broadband connection error 769 cause (unable to connect to the specified destination), usually this refers to your computer's network device problems, if one of the following conditions, you will receive error 769 information as long as the following: 1. The network cable has been disconnected. 2. The modem is disabled. 3. The modem driver is corrupted. 4. Spyware is running on the computer, which preve

The development of WiMax technology also puts forward higher requirements for receiving and transmitting tests corresponding to WiMax physical layer tests. R S provides targeted testing solutions. WiMAX is called World Interoperability for Microwave Access. It is a wireless MAN technology ), A base station can provide a maximum downstream data transmission rate of Mbps for multiple fixed users within a 3-10 km radius, and provides a maximum downstream data transmission rate of 15 mbps for multi

existing communication technologies from a relatively high level and system perspective, and analyzed many seemingly completely unrelated technologies in a unified mathematical expression, in particular, the popular technologies such as MIMO, Opportunistic Communication, OFDM, and multi-user Communication have been interpreted from the viewpoint of information theory, this is helpful for us to grasp the current development direction of wireless commu

The development of WiMAX technology also puts forward higher requirements for receiving and transmitting tests corresponding to WiMAX physical layer tests. R S provides targeted testing solutions. WiMAX is called WorldInteroperabilityforMicrowave Access. It is a wireless MAN technology ), A base station can provide a maximum downstream data transmission rate of Mbps for multiple fixed users within a 3-10 km radius, and provides a maximum downstream data transmission rate of 15 mbps for multiple

3G is no longer a pioneer in Internet development. The emergence of 4G is even more prominent. Here, we will introduce the solutions for 4G networks and Wimax wireless technology. The Nortel solution is used as an example. Let you go into the infinite imagination of the future. What is WiMAX wireless technology? WiMax (Worldwide Interoperability for Microwave Access), that is, global Microwave interconnection Access. Another name of WiMAX is 802.16. WiMAX is a new broadband wireless access techn

bytes of data: Time Out time out 1. if you have multiple computers, you can replace them with other computers. Do not install any proxy server software or any firewall on the replaced computer, and install only one Nic to connect directly with adslmodem, install the ADSL dialing software correctly. Check whether browsing is normal. If yes, the fault is caused by the user's computer. If not, check whether the modem and line are normal. 2. if you have

, because the 3. Likewise, the CDMA module can send Chinese characters, English letters, and numbers together, all of which are sent using the corresponding Unicode code. China Mobile text message NetworkProfessional Business of Wavecom/Siemens GSM/GPRS/CDMA productsWavecom product Hotline: 13331012788 13910138186Tuhttp: // www.lianyisms.comE-mail: lianyisms@126.comOnline QQ: 313212930 SMS Communication and CMS errors1. How to establish communication with the GSM Modem2. Do not communicate wit