analog communication

Advantages - The advantages associate with digital communication systems include (i) A common format for encoding different kinds of message signals (e.g., speech signal, video signal, computer data, etc.) for the purpose of transmission. (ii) An improved security of message. (iii) Increa..

Analog and Digital Communication - The concept of information is central to communication. There is no precise definition of the word "information". So, instead of information, we deal with "message". Message is defined as the physical manifestation of information as p..

The concept of information is central to communication. There is no precise definition of the word "information". So, instead of information, we deal with "message..

The disadvantages associate with digital communication systems include (i) Increased transmission (ii) Increased system complexity Although digital communication is becoming increasingly attractive for practical use, it is a fact that analog communication sy..

The simplest approach to the design of modems is to treat the entire PSTN as a linear analog network. [Note that PSTN is almost entirely due to the use of pulse-code modulation (PCM) for the transmission of voice signals.]..

. Let us now focus our attention on modems that provide communication between a user and an Internet Service Provider (ISP) over the PSTN. Traditionally, the PSTN has been viewed as an analog network. However, in reality, the PSTN has become an almost entirely digital network. I..

. If the mathematical sums do not match, the modems communicate with each other by resending the missing segments of data. Modems also have special circuitry that allows them to compress digital signals before modulating them and then decompressing them after demodulating the signals. The..