dqpsk modulation

 calculation of MCS, modulation order, encoding rate, spectral efficiency relationship table Reference URL: http://4g-lte-world.blogspot.tw/2012/12/transport-block-size-code-rate-protocol.html Reference URL: http://blog.richliu.com/2013/10/22/1545/ (1) Premises: Therefore, the efficiency can be simplified to the following formula: tbs= size of the transfer block (table 7.1.7.2.1-1) crc= the number of bits that are attached for error checking =24

Modern mobile communication systems all use digital modulation technology. Because digital communication is flexible in network construction, it is easy to use digital error control technology and digital encryption to facilitate integration and access the Integrated Service Network (ISDN ), therefore, all communication systems are crossing the data in analog mode. As a part of the entire network, mobile communication will inevitably transition from a

Reprinted: What is PWM (Pulse Width Modulation): http://www.shenmeshi.com/Science/Science_20070315160722.html PWM (Pulse Width Modulation)-pulse width modulation (PWM) is an on/off type regulated power supply application. It is a very effective technology that uses the digital output of a microprocessor to control analog circuits. With the development of electro

How to disable Dynamic Frequency Modulation of CPU 1. how can I check whether the dynamic frequency modulation function www.2cto.com is enabled on the current OS and whether the clock speed of all cores is the maximum CPU speed: grep-E '^ model name | ^ cpu MHz'/proc/cpuinfo can also be used through: lsmod | grep cpufreq_ondemand to check whether the cpufreq_ondemand module is loaded or through: service --

First, FM modulation 1, the code is as follows:CLC,CLEAR;FM= -; %modulation signal frequency (Hz) Am=0.5; %modulation signal Amplitude FC= 5e3; %Carrier Frequency (Hz) Ac=1; %Carrier amplitude MF=5; %FM Index%%%FIRSTLYKF= MF *2* PI * FM/AMDIATF= KF *AmB=2* (MF +1) *FM%%%SECONDLYFS= 64e3; %Sample Rate N= the; %number of sample points T= (0: N-1)'/fs;% time T%plott

I. GMSK modulation signal generation, software radio DSP implementation processTwo. Gmsk demodulation, one-bit differential demodulation, DSP implementation processThree. Based on the software radio architecture idea, has been implemented and optimized DSP, in line with the projectFour. ReferencesThe DSP realization of GSM communication system Gmsk"Gmsk modulation and demodulation and its TMS320C6XXXDSP rea

With the rapid development of the Internet, communication technology is experiencing a huge revolution, because the number of users accessing the network rapidly increases. As a network connected to the end users in the communication network, the access network has become a hot topic in network technology. Currently, the main access technologies include hybrid fiber/coaxial (HFCs) access technology, optical fiber access technology, copper wire access technology and wireless access technology. Co

Pulse Width Modulation, or PWM, is a technique for getting Analog results with digital means. digital control is used to create a square wave, a signal switched between on and off. this on-off pattern can simulate voltages in between full on (5 volts) and off (0 volts) by changing the portion of the time the signal clock Ds on versus the time that the signal clock DS off. the duration of "on time" is called the pulse width. to get varying analog value

Recently want to use Raspberry Pi control model of the ESC, so studied the next PWM, seemingly control the ESC is troublesome, because the ESC needs to send a few specific signals to start, and then to enter the control mode, today first understand PWM, slowly toss. The following program pro-test is available, I use the Raspberry Pi model B,12gpio port is the 6th pin outside.Pulse width modulation (PWM) refers to the digital output of the microprocess

Always wanted to study the recording. There's a project that has a chance to use the powerful Naudio (Https://github.com/naudio/NAudio) LibraryRecordingNaudio Recording Class Librarypublic class Naudiorecorder {public WaveIn wavesource = null; Public Wavefilewriter wavefile = null; private string fileName = String. Empty; Voice ChangerThe voice changer used to be SoundTouch.dll.SoundTouch Wrapperpublic class SoundTouch {private INTPTR handle; Public SoundTouch () {handle = S