Quadrature amplitude modulation signalling is currently enabling rapid data transfer capacity growth, but it still has associated drawbacks. Here, Liu et al.use optical injection locking to ...

Modulation is fundamental to electronic communications. The modulating signal might be analog in nature (voice or music) or digital bit streams. Most modern communication systems are digital, using ...

Modulation schemes have different characteristics for different media One of the simplest digital modulation schemes, QAM, takes two subsets of each binary word and applies the magnitude of each ...

More information: Ruqiao Xia et al, Achieving 100% amplitude modulation depth in the terahertz range with graphene-based tuneable capacitance metamaterials, Light: Science & Applications (2025).

I/Q Test-Signal Properties To test I/Q modulator performance, two baseband analog signals are needed: the I and Q signals. They require amplitude accuracy and low distortion and jitter.

The web is filled with introductions to Delta Sigma modulation (also sometimes referred to as Sigma Delta modulation) in the context of Delta Sigma converters. Unfortunately, the ones I’ve ...

Modern Modulation Techniques Jul 1, 2014 9:00 AM, Jeremy Ruck, PE Modern society is definitely more mobile than it was several decades ago. Accompanying the increased mobility is a corresponding ...

What does amplitude modulation actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

The LT5528 is a direct I-Q modulator incorporating a matched pair of double-balanced mixers that form a carrier suppressed, image reject I-Q (In phase and quadrature) modulator. It is intended for ...

Modern Modulation Techniques Jul 1, 2014 9:00 AM, Jeremy Ruck, PE Modern society is definitely more mobile than it was several decades ago. Accompanying the increased mobility is a corresponding ...

Kyushu University researchers have successfully developed an ultra-high-speed optical modulator that can operate at more than 10 times the speed of current devices.