Carrier Wave Modulators

The term carrier wave originated with radio. In a radio communication system, such as radio or television broadcasting, information is transmitted across space by radio waves.At the sending end, the information, in the form of a modulation signal, is applied to an electronic device called a transmitter.In the transmitter, an electronic oscillator generates a sinusoidal alternating current of

In amplitude modulation, the circuit or the modulator combines the carrier wave Fig 1 and the message signal Fig 2 to form a modulated wave Fig 3 that is a carrier wave with change in amplitude. The frequency that I choose for the figures is for examples only. In reality, the value of the frequency is higher. Fig 1.

A carrier wave is a radio-frequency wave that carries information. The information is attached to the carrier wave by means of a modulation process that involves the variation of one of the carrier-frequency characteristics, such as its amplitude, its frequency, or its duration. All of these processes are discussed in greater detail in the article telecommunication system.

To include speech information or data information, another wave needs to be imposed, called an input signal, on top of the carrier wave. This process of imposing an input signal onto a carrier wave is called modulation. In other words, modulation changes the shape of a carrier wave to somehow encode the speech or data information that we were

There are many different modulation schemes, meaning that there are different ways of incorporating baseband information into a sinusoidal carrier wave. Modulation involves modification of a carrier's amplitude, frequency, or phase, and it can be used to transfer analog signals or digital data.

A carrier wave is a high-frequency sinusoidal wave that can be modified through modulation to carry information. There are five major forms of modulation that alter the carrier wave to impress information, including amplitude modulation, single-sideband AM, frequency modulation, phase modulation, and double-sideband, suppressed-carrier modulation.

Figure 2 Characteristics of a carrier sinewave . In electrical terms, the carrier is a high frequency electromagnetic wave, and the information is a signal that can be in analog or digital form. The selection of the carrier can vary based on requirements such as speed, robustness, and need for multiplexing. The 3 Basic RF Modulation Schemes

Continuous wave modulation maintains a steady carrier signal, which allows for better signal propagation through various mediums, such as air or water. This ensures that the transmitted signal remains strong and clear, even when it travels over vast distances. Furthermore, continuous wave modulation is less susceptible to interference, making

Amplitude Modulation or AM, is a modulation technology mainly used for radio carrier wave-based message transmission which modifies the carrier wave's amplitude signal intensity in accordance with the message signal, such as an audio signal, i.e., a modulating signal.. In this article, we will learn what amplitude modulation is, its definition, historical overview, equations to explain the

In phase modulation, the phase of the carrier wave is varied in accordance with the modulating signal, keeping the amplitude and frequency of the carrier wave unchanged. However, the modulation may also be classified, according to the nature of carrier wave, into continuous wave modulation and pulse modulation. 1.