ofdm modulation

Preface In terms of transmission rate, 802.11n can increase the WLAN transmission rate from 54 Mbps currently provided by 802.11a and 802.11g to 600 Mbps or even up to Mbps. The mimo ofdm technology, which is applied in combination with MIMO (multi-input and multi-output) and OFDM (Orthogonal Frequency Division Multiplexing) technology, improves the quality of wireless transmission and greatly improves the

Troubleshooting of ORA-100 problems in ofsa System "Error in getting display name ORA-100" In ofsa, when you open OFDM to view the ofsa objects object, a ORA-100 error is prompted, except that the language character set needs to be modified in the registry and in the installation file directory, see the http://blog.csdn.net/dinya2003/archive/2005/09/22/487145.aspx. However, when the information registered in ofsa is incomplete, a similar error

that only the complementary use of various access methods can bring economic, reliable and effective. Therefore, it can play an important complementary role in 3G in a specific region and scope. The combination of WiFi and 3G technology will have broad development prospects. Wifi is a supplement to high-speed Wired Access Technology Currently, wired access technologies include Ethernet and xDSL. As a supplement to high-speed wired access technology, Wi-Fi technology has the advantages of mobili

send and receive radio waves, convert 1s and 0s to radio waves, and convert radio waves back to 1s and 0s. But there are some notable differences between wireless network radios and other radios: They send signals at a frequency of 2.4GHz or 5GHz. This frequency is much higher than the frequency used for mobile phones, walkie-talkies and televisions. The higher the frequency, the more data the signal will carry. They use 802.11 network standards, specific versions: 802.11B is the first version

communication)-both parties to a communication can send information, but not both (and certainly not simultaneously). Two-way simultaneous communication (full-duplex communication)-both sides of the communication can send and receive information at the same time. Baseband signals (i.e. basic band signals)-signals from sources. Data signals such as computer output that represent a variety of text or image files belong to the baseband signal. Baseband signals often contain more low-fr

processing time. Tint ColorHue Color Color modulation for the anamorphic flare type.Color modulation for Morph flare types 1st-4th ColorColor Type Color modulation for all lens flares if ghosting or Combined is chosen.The modulation color used when the ghosting or merge is selected.

the development of IP telephony has become a new business growth opportunityOther value-added services-distance education, E-commerce, electronic fees, telemedicine, online games, etc.3. HFC Network data communication technologyThe HFC network, as the network that transmits image information, has a bandwidth of 5MHz---1000MHz, and usually a TV channel uses 6MHz or 8MHz, such as PAL and NTSC. Data transmission is also the use of a channel's bandwidth as carrier-borne

with upstream and downstream alliances After winning market recognition through cost-effective products and high-level services, hongrui Hori did not stop moving forward, but continued to make efforts on the application end, as the first 3D printing company to support the creation of "Zhang Fei printing" Studio. "Zhang Fei printing" studio is also expected to bring the performance advantages of hongrui 3D printer to the extreme, with the team's superb post-processing and color technology, this

circuit switching network, resources provided for inter-system communication along the terminal system communication path are reserved during communication sessions. These resources are not reserved in the group exchange network. The circuit in the link is implemented through frequency division multiplexing (OFDM) or time division multiplexing (TDM. For OFDM, the spectrum of the link is shared by all conne

1 "show row number 2 set nu 3 4" Hide assist prompt 5 set shortmess = ATI 6 7 "syntax highlight 8 syntax on 9 10" file type automatic detection 11 filetype on 12 13 "Use Vim keyboard mode 14 set nocompatible 15 16" No need to back up 17 set nobackup 18 19 "no storage or file read-only pop-up confirmation 20 set confirm 21 22" 23 set mouse available = a 24 25 "tab indent 26 set tabstop = 4 27 Set shiftwidth = 4 28 set expandtab 29 set smarttab 30 31" file automatically detects external changes 32

1. We should look at the reviewed articles in the research field and have a general understanding of the development and technology of the entire research direction. Find the desired direction. 2. It depends on the original papers in the research field, that is, the most classic and cited papers. Opinion: we need to carefully study the classic original algorithm and system model, and push the algorithm derivation and simulation. Write down the shortcomings of the algorithm. 3. Check the papers t

Fixed resource allocation and dynamic resource allocation are two effective methods for transferring resources. Low-speed data terminals can use a high-speed line to achieve low-cost communication. This method is multiplexing. From the perspective of the allocation of transmission resources, there are two methods: fixed resource allocation and dynamic resource allocation. 1. Fixed Resource Allocation Method The fixed allocation resource method is divided into "Time Division Multiplexing" TDM, Ti

many spaces are moved at a time,: help shiftwidth04set cindent "C language Smart indent 05 set textwidth = 80" sets the width of one line to 06 set comments = sl:/*, mb :**, elx: * "automatic completion annotation symbol 07 filetype plugin indent on" enable automatic file type detection 08 set completeopt = longest, menu "set word auto-completion option 09 set autoindent" set auto-indent 10 set encoding = UTF-8 fileencodings = ucs-bom, UTF-8, cp936 "set encoding, the correct encoding is used to

integrated voice and data services is between 14 and 14 ~ 18 months. It should be noted that, due to bandwidth restrictions, each CPE can only be opened on average 2 ~ Three k data users. Therefore, the technical and cost advantages of WiMAX are obvious here. Widely used A7387WiMAX Systems Based on the standard, the A7387WiMAX system conforms to the development trend of the Scale Economy and ensures that the costs of equipment keep decreasing, so as to promote widespread acceptance and rapid g

New Solution for LTE Networks" Mobile, broadband, and IP-based telecommunication services are becoming increasingly apparent. mobile communication technology is in a critical period of network technology evolution. As a unified standard for next-generation mobile communication, the LTE system has many advantages, including high-frequency spectral efficiency, peak rate, high mobility, and flattened network architecture. This efficient network system not only brings us good network awareness, but

Protocol, C/S mode, full duplex communication .. hypermedia terms parsing protocol, C/S mode, full duplex communication, serial transmission, OFDM, STDM, URL, hypertext, and hypermedia. Protocol: the rules and conventions for managing computer communications become the protocol. C/S Mode: Client Server mode. Full Duplex Communication: both parties can send and receive information simultaneously. Serial Transmission: Binary bit is transmitted one by on

currently using short sync signals (preamble), and this tenth chapter will be further explained. 0 means that this option is not used and a short sync signal is not used in the BSS. The 802.11g specifies the use of short-sync signals, so this bit must be set to 1 in the network built with the 802.11G standard. PBCC (packet binary convolutional encoding) This bit is added to the 802.11B specification to support high-speed direct sequence spread spectrum physical layer (high-rate DS

" Enable Automatic file type detection 08 set completeopt = longest, menu "set word auto-completion option 09 set autoindent" set auto-indent 10 set encoding = UTF-8 fileencodings = ucs-bom, UTF-8, cp936 "set encoding, only the correct encoding can display the Chinese 11 set OFDM = indent "set the folding mode to automatically fold according to the indentation.: help OFDM 12 set hlsearch" highlight the sear

Wildcard OFDM character or period (.) is considered to be equivalent to a variable. A variable represents any value in an arithmetic expression. In a regular expression, a period (.) is a wildcard character that represents any character except newline characters (in awk, a period can even match an inline newline character).Assuming that we are describing a sequence of characters, use the wildcard OFDM chara

is the modulation method, because the frequency and bandwidth requirements for different applications are different. The DVB-S of high-frequency carrier is used to use the PSK modulation method, the DVB-C of low-frequency carrier is used to use the QAM-64 modulation method, and the DVB-T of high frequency carrier and ultra-high frequency carrier is used to use t