What is PCM in communication system?
Table of Contents
What is PCM in communication system?
A digital technique that involves sampling an analog signal at regular intervals and coding the measured amplitude into a series of binary values, which are transmitted by modulation of a pulsed, or intermittent, carrier. It is the standard technique in telecommunications transmission.
What is PCM process?
PCM (Pulse Code Modulation) is a standardized method used in the telephone network (POTS) to change an analog signal to a digital one. The analog signal is first sampled at a 8-kHz sampling rate. Then each sample is quantized into 1 of 256 levels and then encoded into digital eight-bit words.
What is PCM and its advantages?
There are some important advantages of PCM(pulse code modulation) which are given below, The PCM (pulse code modulation) convenient for long distance communication. It has a higher transmitter efficiency. It has a higher noise immunity.
Why is PCM digital modulation technique?
Modulation is the process of converting data into electrical signals optimized for transmission. A signal in pulse code modulation is pulse code modulated to convert its analog information into a binary sequence. This is the reason why we call PCM a modulation technique.
Is PCM a digital modulation scheme?
Pulse code modulation (PCM) [13] is a digital scheme for transmitting analog data. It converts an analog signal into digital form.
What is the full form of PCM?
Physics Chemistry Maths
| Full Form | Category | Term |
|---|---|---|
| Pulse-Code Modulation | Information Technology | PCM |
| Pulse Code Modulation | Computer and Networking | PCM |
| Personal Call Manager | Telecommunication | PCM |
| PAVURCHUTRAM | Indian Railway Station | PCM |
What is PCM application?
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications.
What is PCM advantages and disadvantages?
It requires large bandwidth as compared to other method called an analog system. Overloaded appears when modulation signal change between sampling, by an amount greater than the size of the step. The difference between the original analog signal and the translated digital signal is called quantization error.
What are the basic elements of PCM?
Basic Elements of PCM
- Low Pass Filter. This filter eliminates the high frequency components present in the input analog signal which is greater than the highest frequency of the message signal, to avoid aliasing of the message signal.
- Sampler.
- Quantizer.
- Encoder.
- Regenerative Repeater.
- Decoder.
- Reconstruction Filter.
Why PCM is a very complex technique explain?
In fact, the pulse-code modulation is quite complex as compared to the analog pulse modulation techniques i.e. PAM, PWM and PPM, in the sense that the message signal is subjected to a great number of operations . In PCM an anlog signal or information is converted into a binary sequence, i.e.,’ 1’s and ‘0’s.
What are types of digital modulation?
There are three types of digital modulation, and they are: Amplitude shift key (ASK) Frequency shift key (FSK) Phase shift key (PSK)