The workloads hosted in a datacenter share more than just servers; they also share electrical circuits. Datacenter managers provision the power capacity of these circuits to hosted workloads, often based on peak power needs. In this work, we studied the typical (mode) and peak power needs of 3 real datacenters, using 1) data from hardware manufacturers and 2) past traces of observed power needs...

Many modern communication signal formats, such as orthogonal frequency-division multiplexing (OFDM) and code-division multiple access (CDMA), have high peak-to-average power ratios (PARs). A signal with a high PAR not only is vulnerable in the presence of nonlinear components such as power amplifiers (PAs), but also leads to low transmission power efficiency. Selected mapping (SLM) and clipping...

While power has long been a well-studied problem, most dynamic power reduction techniques, e.g., V/f scaling, clock gating, etc., exploit slack in the execution behavior of programs to reduce average power. Peak power is often left untouched. However, peak power plays a large role in determining the characteristics and hence the cost of the power supply, thermal budgeting for the chip, as well ...

A technique is described for a better than 5 dB reduction in the Peak to Average Power Ratio (PAPR) of an OFDM signal. The optimal amplitude and phase of additional peak reduction carriers (PRC) is obtained using a codebook, which is obtained using a search of all possible signal combinations.

Due to the ever-growing load, especially peak load, the increase in the capacity of plants is inevitable for the response to this growth. Peak load causes increases in customer costs and vast investments in generating and transmission parts. Therefore, restructuring in the electrical industry, competition in the electrical market and Demand Response Programs (DRPs) are of special importance in ...