With the explosive growth of mobile data demand, the fifth generation (5G) mobile network
would exploit the enormous amount of spectrum in the millimeter wave (mmWave) bands to …

Continuous monitoring of vital signs, such as respiration and heartbeat, plays a crucial role
in early detection and even prediction of conditions that may affect the wellbeing of the …

Millimeter wave (mmWave) communications have recently attracted large research interest,
since the huge available bandwidth can potentially lead to the rates of multiple gigabit per …

Power delay profiles characterize multipath channel features, which are widely used in
motion-or localization-based applications. Recent studies show that the power delay profile …

I/Q signal processing is widely utilized in today's communication receivers. However, all I/Q
processing receiver structures, such as the low-IF receiver, face a common problem of …

Software defined radio (SDR) is one of the most important topics of research, and indeed
development, in the area of mobile and personal communications. SDR is viewed as an …

Fiber-optic communication systems have revolutionized our telecommunication
infrastructures–currently, almost all telephone land-line, cellular, and internet …

The new Digisonde-4D, while preserving the basic principles of the Digisonde family,
introduces important hardware and software changes that implement the latest capabilities …

The performance of zero-IF receivers with current-driven passive mixers driven by 25% duty-
cycle quadrature clocks is studied and analyzed. It is shown that, in general, these receivers …

Communication receivers that utilize I/Q downconversion are troubled by amplitude and
phase mismatches between the analog I and Q branches. These mismatches are …