What is the digital modulation and multiplexing

digital modulation

Now that we have study the proprietor of word and wireless Channel V turn or attention to the problem of sending Digital information wires and wireless channel carry an along single signal such as continuously where are you voltage light intensity or sound intensity to Sand Digital information we must device analogue signal to represent this between bits and signal that represent when is called digital modulation..

. definition

channel are often shared by multiple signal after all it much more on resigned to use a signal wire to carry several signal than to install a wire for every signal this kind of sharing is called multiplexing it can be a complete in several difference...

baseband transmission

he most straight forward from of digital modulation is to use a positive voltage a represent and in negative voltage to represent a 0.4 and optical fiber the reasons of high might present a one and the absent of light might represent is 0. Scheme means that the signal follow the data and example is showing figure...

clock recovery

whole all scheme that in codebids into symbols the receiver must cannot when one symbol and and the next symbol begins to correctly decod the beast with an r z in which the symbols are simply voltage level in long run of 0s the signal and changed after a will it unless you have a very accurate clock