Frequency multipliers based on superlattice (SL) devices as nonlinear elements have been developed as radiation sources for a terahertz (THz) laboratory spectrometer. Input frequencies of 100 and 250 GHz from backward wave oscillators have been multiplied up to the 11th harmonic, producing usable frequencies up to 2.7 THz. Even at these high frequencies the output power is sufficient for labora...

Abstract The EU27 countries exert significant influence on the global patterns of CO2-Emissions-Water-Energy (CWE) nexus. However, whether associated benefits are similar for all is unclear. In this paper, an multiregional input-output model, at a sector level to identify inter-regional and -sectoral CWE flows, clarify regional, sectoral worldwide network presented. results revealed environment...

We present a status report of an ongoing effort to develop robust tunable all-solid-state sources up to 1900 GHz for the Heterodyne Instrument for the Far Infrared (HIFI) on the Herschel Space Observatory. GaAs based multi-chip power amplifier modules at W-band are used to drive cascaded chains of multipliers. We have demonstrated performance from chains comprised of four doublers up to 1600 GH...

We propose a model with involuntary unemployment, incomplete markets, and nominal rigidity, in which the effects of government spending are state-dependent. An increase purchases raises aggregate demand, tightens labor market reduces unemployment. This turn lowers unemployment risk thus precautionary saving, leading to larger response private consumption than perfect insurance. The output multi...

In this paper, we present a VLSI architecture for separable 2-D Discrete Wavelet Transform (DWT). Based on 1-D DWT Recursive Pyramid Algorithm (RPA), a complete 2-D DWT output scheduling scheme is derived. The U0 between memory which stores the intermediate results and DWT core is simplified by “circular coefficients arrangement”. And the concept to store the “partial accmulation sum” of convol...

In this paper, we introduce $(p,q)g-$Bessel multipliers in Banach spaces and we show that under some conditions a $(p,q)g-$Bessel multiplier is invertible. Also, we show the continuous dependency of $(p,q)g-$Bessel multipliers on their parameters.

In this paper, we present a novel high-speed lowcomplexity four data-path 128-point radix-2 FFT/IFFT processor for high-throughput MB-OFDM UWB systems. The high radix radix-2 multi-path delay feed-back (MDF) FFT architecture provides a higher throughput rate and low hardware complexity by using a four-parallel data-path scheme. A method for compensating the truncation error of fixed-width Booth...

Low-cost and power efficient finite impulse response (FIR) designs are presented using the concept of faithfully rounded truncated multipliers. Here we consider the optimization of bit width and hardware resources without abdication of the frequency response and output signal precision in the process of accumulation of filter computations. Non uniform coefficient quantization with proper filter...

In this report, we apply constraint least squares solution (CLS) to the problem of reducing the number of operations in FIR digital filters with a motivation of reducing its power consumption. The constraints are defined by the maximum allowable add/subtract operations in forming the products which are used in computing the output. We show that truncation and rounding 0.f coefficients can be vi...

this study analyzes the contribution of the sectoral total factor productivity growth (tfpg) and the input's growth to the iran's economy sectors growth during 1345 -1383. the major findings show that the average contribution of tfp growth to non-oil output's growth during first, second and third development plans has been 39.5%, 12.2% and 24.8% respectively, amounting to (as est...