Viterbi decoders employed in digital wireless communications are complex and dissipate large amount of power. In this paper, we investigate power dissipation of Radix-4 Viterbi decoder and SST (Scarce State Transition) Radix-4 Viterbi decoder with changing the constraint length K (namely, K=3, 4). We presents a low power, high-rate Viterbi decoder using SST scheme and Radix-4 trellis. The SST m...

We show the importance of sequential sorting in the context of in memory parallel sorting of large data sets of 64 bit keys. First, we analyze several sequential strategies like Straight Insertion, Quick sort, Radix sort and CC-Radix sort. As a consequence of the analysis, we propose a new algorithm that we call Sequential Counting Split Radix sort, SCS-Radix sort. SCS-Radix sort is a combinati...

We present a radix-4 static CMOS full adder circuit that reduces the propagation delay, PDP, and EDP in carry-based adders compared with using a standard radix-2 full adder solution. The improvements are obtained by employing carry look-ahead technique at the transistor level. Spice simulations using 45 nm CMOS technology parameters with a power supply voltage of 1.1 V indicate that the radix-4...

In this paper, we present a 128-point FFT/IFFT processor for ultrawideband (UWB) systems. The proposed FFT is developed based on the higher radix -2 4 . It reduces computational complexity and hardware requirement compared to conventional radix -2 FFT. Since the proposed pipelined architecture for 128-point FFT is designed using mixed-radix (16+8) multipath delay feedback (MRMDF). The proposed ...

SRT dividers are common in modern floating point units. Higher division performance is achieved by retiring more quotient bits in each cycle. Previous research has shown that realistic stages are limited to radix-2 and radix-4. Higher radix dividers are therefore formed by a combination of low-radix stages. In this paper, we present an analysis of the effects of radix-2 and radix-4 SRT divider ...

This investigation proposes the novel radix4 and radix-4 algorithms with the low computational complexities of the radix-16 and radix-64 algorithms but the lower hardware requirement of the radix-4 algorithm. Base on the serial delay feedback path pipeline architecture, the proposed design adopts a multiplierless radix-4 butterfly structure to support 4096-point FFT/IFFT computations. Moreover,...

Alcohol consumption is known to cause substantial neuronal loss in several regions of the brain. In Oriental medicine, medications based on Puerariae radix have been known to be of efficacy in the treatment of alcohol-related problems. In the present study, the effect of the aqueous extract of Puerariae radix on the expression of c-Fos, an immediate early gene whose expression is sometimes used...

The FFT processor is a very important component in Orthogonal Frequency Division Multiplexing(OFDM) communication system. In this paper, we propose an efficient variable-length radix-8/4/2 FFT architecture for OFDM systems. The FFT processor is based on radix-8 FFT algorithm and also supports radix-4 or radix-2 FFT computation. The pipelined radix-8/4/2 butterfly unit computes radix-8 FFT algor...

Radix Puerariae is the dried root of Pueraria lobata (Willd.) Ohwi, which releases a variety of isoflavones. The objective is to investigate the extraction process of total flavonoids in Radix Puerariae and to examine their effects on blood glucose MDA in alloxan-diabetic mice. Solvent extraction and column chromatographic isolation were used to extract the total flavonoids in Radix Puerariae, ...

An aqueous extract of Platycodi radix inhibited the hydrolysis of triolein emulsified with phosphatidylcholine by pancreatic lipase in vitro and it reduced the elevation of rat plasma triacylglycerol level 2-4 h after oral administration of a lipid emulsion containing corn oil. These preliminary results suggested that the aqueous extract of Platycodi radix may inhibit the intestinal absorption ...