ofdm modulation

displayed in the VIM status line (including file type and decoding) Set smartindent Provides automatic indentation for C Programs Set cindent Use a C-style indent Scheme Set ignorecaseSet list Case Insensitive during searchDisplay the tab (ctrl + I) and the end of the line sign ($) Colorscheme desertColorscheme eveningColorscheme default Vim Color Scheme ====

............ | ..................... |....... One two .......... Me too........... |..... Change 4........... |...... Not two CodeFold 1. Folding Mode You can use the 'foldmethod' option to set the foldmethod:Set OFDM = ***** .There are 6 Ways to select the fold:Manual manual definition foldingMore indent indicates more foldExpr uses expressions to define collapseSyntax uses syntax highlighting to define collapseDiff folds Unchanged textM

insert column operation is slightly different. for example, we insert "()" before each row: 1. position the cursor to the position to be operated. 2. press ctrl V to enter the "visible block" mode and select the number of rows to operate on this column. 3. shift I (I) input the content to be inserted. 4.esc press twice to insert content in the selected area of each line. this makes it much easier. Vim code folding When writing C, (C ++) CPP Code, automatic folding can bring many benefits. Th

systems that can be upgraded from cdmaone to smooth. The route of its evolution is Cdmaone--cdma20001x--cdma20001xev. Another mainstream of the third generation of communication technology is the second generation of GSM standard developed by the WCDMA technology, because GSM uses TDMA (time division Multiple Access) modulation mode, and WCDMA uses CDMA (Code Division Multiple Access) modulation, its air c

Hue Change and type The change of tone, namely tonal conversion, is an important subject in the design of color selection in art design, with many kinds of varieties and designs, and the form of modulation is generally fixed deformation adjustment, fixed-color modulation, setting color modulation and so on. 1, fixed deformation adjustment The essence is to mai

digital signal into an analog signal, and the receiver uses the demodulator to convert the received analog signal into a digital signal, which is the modulation and demodulation of the signal.The device that implements the modulation and demodulation tasks is called a modem. When using the frequency band transmission, each side of the communication is connected to a modem, and the digital signal is sent to

transmission rate is equal to twice times of the bandwidth to ensure the non-interference between the front and rear code elements. Rmax (maximum information transfer rate) = B*2 B: Bandwidth B. Noise (bandwidth and signal-to-noise ratio) Calculate with Shannon formula C: (channel capacity) channel error-free maximum information transfer rate, that is, rmax (information transfer rate maximum) B: Bandwidth S/N: Signal-to-noise ratio (db) The most common is the signal to noise ratio 30db, can g

Vim settings code folding Source: chinaunix blog Date: 2008.08.29 (comments in total)I want to comment When viewing the Code, if the code is very lengthy, especially in the C/C ++ series,The code structure is hard to clarify, mainly due to the matching of comments and parentheses,Although % can be used to check where the other half of the matching symbols are, it is hard to understand if the code between the two sy

device.Equipment required for system construction: the central station uses Sunet5800-AU high-speed wireless bridge, uses OFDM technology, rate 54 Mbps, support point-to-point wireless communication; remote station uses Sunet5800-RU, uses OFDM technology, rate 54 m, supports point-to-point wireless communication. The central station uses a flat-panel sector antenna with 18 DBI gain, and the remote station

measure the frequency of F2. Reproducibility = (f2-f1)/F2.Frequency Voltage Control Range: Adjust the frequency control voltage from the reference voltage to the specified end voltage,Crystal OscillatorThe minimum peak value of the frequency.Note: The reference voltage is + 2.5 V, and the specified end voltage is + 4.5 V and + 2ppm v. When the Voltage Controlled Crystal Oscillator controls the voltage at + V frequency, the frequency changes, when the frequency change is + 1ppm when the voltage

Automatic scanning read/write distance 4 W transmitting antenna unidirectional ≥ 1.3 m, omnidirectional ≥ 0.9m antenna connector 50Ω SMA Communication Interface RS/232, VGA, DI power warning light, DC12V; Control System and LCD, DC24V, 1A warning light source over-Bright Light Emitting Diode Communication Interface RS232, VGA, USB, RJ45, DI, DO power supply 220 V, AC single board control module operating system Windows, Dos transmit power ~ 10 W 1 dB operating frequency 13.56MHz7kHz antenna int

arrive at the scene of the accident. If a serious accident occurs in the tunnel, a fire may occur, therefore, after an accident occurs in the tunnel, an emergency evacuation broadcast system is urgently needed. FMFM broadcast in the tunnel is a good emergency broadcast. Drivers can obtain evacuation and emergency command information through the radio, this service provides emergency incident command and handling to guide drivers to avoid risks. Therefore, whether in terms of security or service

management personnel to arrive at the scene of the accident. If a serious accident occurs in the tunnel, a fire may occur, therefore, after an accident occurs in the tunnel, an emergency evacuation broadcast system is urgently needed. FMFM broadcast in the expressway tunnel is a good emergency broadcast. Drivers can obtain evacuation and emergency command information through the radio, this service provides emergency incident command and handling to guide drivers to avoid risks. Therefore, whet

tunnel management personnel to arrive at the scene of the accident. If a serious accident occurs in the tunnel, a fire may occur, therefore, after an accident occurs in the tunnel, an emergency evacuation broadcast system is urgently needed. FMFM broadcast in the expressway tunnel is a good emergency broadcast. Drivers can obtain evacuation and emergency command information through the radio, this service provides emergency incident command and handling to guide drivers to avoid risks. Therefor

According to different signal transmission and receiving methods, ISO/IEC14443-3 defines two types of cards: typea and typeB. Their differences mainly lie in the modulation depth of the carrier and the encoding method of the binary number. When transmitting signals from a read/write machine to a card, the two transmit signals through the RF carrier of 13.56mhz. Typea represented by Philips and Siemens. It sends the miller code with 100% ASK

. Figure 1 shows the principle of a visible-light Wireless Communication System Based on USB interfaces. The system consists of three parts: 1. the interface circuit connects the computer and optical transceiver, converts the USB signal from the computer into a signal suitable for transmitting circuit modulation, and converts the signal sent from the receiving circuit into a USB signal to the computer, implement high-speed wireless duplex communicatio

the data transmission rate. The main function of MAC-hs added to NodeB is to schedule sent data and control retransmission of data. Retransmission is directly controlled by NodeB, which avoids the delay from RNC to UE, increases the retransmission rate, and reduces the latency during data transmission. At the same time, NodeB can quickly schedule the size of data to be sent and objects to improve the cell throughput. Because the shared channel uses the system to adaptive adjust the User

Wireless network technology is becoming more and more powerful. to master the RF communication technology, we will give you a detailed description of the wireless technology, suppliers are attempting to use "easy to install", "seamless connection" and other commitments to mask abnormal Wi-Fi physical layer signals. However, you need to use RF technology to manage a large wireless network, just as you must know that if the connection is used to build an effective lan. Knowledge of RF communicatio

coupling between the reader and the electronic tag:(Ⅰ) inductance coupling. The transformer model, through the space high frequency alternating magnetic field realizes the coupling, is based on the electromagnetic induction law.(Ⅱ) Electromagnetic backscatter coupling. The radar principle model, the emitted electromagnetic wave, touches the target to reflect, simultaneously carries back the target information, is based on the electromagnetic wave space propagation law. Induc

status is similar to the AIFF in the Macintosh computer. This format is one of the applications of the resource Exchange file format (RIFF), which typically stores audio assets encoded with pulse encoding in chunks. It is also one of the most commonly used specifications in music enthusiasts. Because this audio format is not compressed, there is no distortion in sound quality, but the volume of the archive is larger in many audio formats. "We can see the above mentioned two keywords RIFF and pu