Quadrature Amplitude Modulation: Modulator and Demodulator

Overview

QAM Modulator and Demodulator combine two amplitude modulation signals into a single data transfer channel:

1. Technique of modifying any one characteristic (amplitude, frequency, or phase) of a relatively high-frequency carrier signal in proportion to the instantaneous value of the modulating signal or message signal is known as modulation.
2. In demodulation, signals from the transmitter enter the demodulator and are divided into two signals that are sent into separate mixers. The local oscillator generates needed frequency demodulation signals, which are in-phase and quadrature signals.

Key Features

1. Quadrature amplitude modulation Aside from increased channel capacity, QAM has various other advantages, which are stated below.
2. One of the most significant advantages of QAM is its ability to sustain a high data rate. As a result, the carrier signal can carry a certain amount of bits. Because of these benefits, it is preferred in wireless communication networks.
3. The noise immunity of QAM is quite strong. Noise interference is a bit low as a result of this.
4. It has a low mistake probability value.
5. QAM makes excellent utilization of channel capacity.
6. The carrier signal may transport more bits, resulting in a high data rate.
7. Because of the high noise immunity, there is less noise interference during data transmission.
8. The likelihood of incorrect values is negligible.

Benefits

1. QAM is a modulation technology that combines two amplitude modulated signals into a single channel, thus doubling a system’s bandwidth.
2. Digital analysis of QAM modulators utilizing “Verilog HDL” code and an “RTL compiler.”
3. QAM is a modulation method that is used to send digital data between two places utilizing analog signals.
4. Method of transmitting data and information via a carrier signal, such as an LTE waveform.
5. There are 16-QAM, 64-QAM, and 256-QAM QAM schemes in both wireless and wireline communications, as well as even higher QAM schemes, such as 1024-QAM, which are presently being studied for the future growth of LTE/LTE-Advanced Pro and 5.

Block Diagram

Technical Specifications

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