Modulation signal coding is a type of coding that combines two or more signals and transmits them as a single signal This form of coding is also known as channel coding. In this coding method, the two signals are combined using a technique called modulation. Modulation involves altering the amplitude, frequency, or phase of the signals. This process results in a signal which has different properties compared to the original signals.
Modulation signal coding is used in a variety of communication applications. It is mainly used to increase the throughput, reliability, and capability of communication channels by allowing more information to be carried on a single signal. By combining two signals and allowing more data to be transmitted through them, it reduces the amount of time required to send the information and increases the quality of the transmitted signals. This is especially beneficial in areas where bandwidth is limited or costly.
There are five examples of modulation signal coding that can be used in various communication applications.
The first example is pulse-code modulation (PCM). It is a form of signal coding which samples the analog signal and then encodes it into digital bits. It is mainly used for telecommunication applications and is capable of transmitting both analog and digital signals.
The second example is differential pulse-code modulation (DPCM). It is a form of signal coding that is used to reduce the signal redundancy. It is mainly used for audio and video streaming over the internet. It is capable of providing high quality audio and video signals at a lower rate than other signal coding techniques.
The third example is quadrature amplitude modulation (QAM). It is a type of modulation coding which is used to embed digital data onto an analog signal. It is mainly used in digital television and radio transmission technologies. It can increase the bandwidth of a single signal and can also be used for transmitting multiple digital signals simultaneously.
The fourth example is frequency-shift keying (FSK). It is a type of signal coding which is used to convey data by changing the frequencies of the signal. It is mainly used in digital radio transmission and is capable of providing reliable communication at a low bit rate.
The fifth example is orthogonal frequency-division multiplexing (OFDM). It is a technique which is used to transmit multiple digital signals simultaneously on a single channel. It is mainly used in wireless networks for providing high-speed data transmission.
These are the five examples of modulation signal coding which can be used for various communication applications. Each technique has its own advantages and disadvantages. Therefore, it is important to consider the requirements of the application before selecting the type of coding to use. With the right signal coding technique, efficient and reliable communication can be achieved.