Dynamic voltage and frequency scaling (DVFS) is a widely used method to improve the energy efficiency of CPU. Reducing during memory-intensive workloads can minimize power consumption without affecting performance, thereby improving overall efficiency. A finer-grained DVFS strategy leads better However, due limitation regulators, implementation granularity current strategies 100 μs or more. Thi...

An all-optical photonic microwave frequency divider (PMFD) is presented. It based on injecting an RF phase modulated optical signal into a semiconductor laser oscillating in the period-two state. New components with separation of half input are generated at output. A divided can be obtained by beating these photodetector. Large harmonic suppression achieved using filter to select only two detec...

Radio frequency impairments such as in-phase/quadrature-phase (IQ) imbalances can result in a severe performance degradation in direct-conversion architecture-based communication systems. In this paper, we consider the case of transmitter and receiver IQ imbalance together with frequency selective channel distortion. The proposed training-based schemes can decouple the compensation of transmitt...

Frequency dividers are key components for frequency synthesis in wireless and wireline communication systems. Among different types of frequency dividers, LC-based injection-locked frequency dividers (ILFDs) feature highfrequency operation at low power consumption, but their locking range is quite narrow due to the high-Q nature of the resonator. Recently, design techniques to enhance the locki...

With its robustness against multipath fading, orthogonal frequency division multiplexing (OFDM) has become the modulation of choice for many modern wireless standards. However, OFDM is very sensitive to offsets in frequency and time. This makes synchronization an essential part of an OFDM system. This paper aims to motivate and analyze past work on OFDM synchronization techniques.

Design of Weyl-Heisenberg sets of waveforms for robust orthogonal frequency division multiplexing (OFDM) has been the subject of a considerable volume of work. In this paper, a complete parameterization of orthogonal Weyl-Heisenberg sets and their corresponding biorthogonal sets is given. Several examples of Weyl-Heisenberg sets designed using this parameterization are presented, which in simul...