In this paper an analytic approach to estimate the nonlinearity of radix-4 pipelined analog-to-digital converters due to the circuit non-idealities is presented. Output voltage of each stage is modeled as sum of the ideal output voltage and non-ideal output voltage (error voltage), in which non-ideal output voltage is created by capacitor mismatch, comparator offset, input offset, and finite ga...

This investigation proposes the novel radix-4 and radix-4 algorithms with the low computational complexities of the radix-16 and radix-64 algorithms and the low hardware requirement of the radix-4 algorithm. Base on the multiplierless radix-4 butterfly structure, the proposed radix-4 single-path delay feedback (R4SDF) design and radix-4 single-path delay feedback (R4SDF) design support the 4096...

This work describes the design of a double-precision radix-8 divider. Low-power techniques are applied in the design of the unit, and energy-delay tradeoffs considered. The energy dissipation in the divider can be reduced by up to 70% with respect to a standard implementation not optimized for energy, without penalizing the latency. The radix-8 divider is compared with one obtained by overlappi...

43  Abstract— A high performance hardware FFT have numerous application in instrumentation and communication systems. It describes new parallel FFT architecture which combines the split-radix algorithm with a constant geometry interconnect structure. The split-radix algorithm knows to have lower multiplicative complexity than both radix-2 as well as radix-4 algorithm. The split-radix algorithm...

Voters are now demanding the ability to verify that their votes are cast and counted as intended. Most existing cryptographic election protocols do not treat the voter as a computationally-limited entity separate from the voting booth, and therefore do not ensure that the voting booth records the correct vote. David Chaum and Andrew Neff have proposed mixnet schemes that do provide this assuran...

Voters are now demanding the ability to verify that their votes are cast and counted as intended. Most existing cryptographic election protocols do not treat the voter as a computationally-limited entity separate from the voting booth, and therefore do not ensure that the voting booth records the correct vote. David Chaum and Andrew Neff have proposed mixnet schemes that do provide this assuran...

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...

The Radix-4 Fast Fourier Transform (FFT) is widely accepted for signal processing applications in wireless communication system. Here, we present a new Radix-4 FFT which reduces the operational count by 6% lesser than standard Radix-4 FFT without losing any arithmetic accuracy. Simulation results are also given for the verification of the algorithm.