The classical combiner Comb01 class (M) = H0(M)||H1(M) for hash functions H0, H1 provides collision-resistance as long as at least one of the two underlying hash functions is secure. This statement is complemented by the multi-collision attack of Joux (Crypto 2004) for iterated hash functions H0, H1 with n-bit outputs. He shows that one can break the classical combiner in n 2 · T0 + T1 steps if...

The outage probability of the Switch and Stay Combining/Selection Combining (SSC/SC) combiner output signal at two time instants, in the presence of log-normal fading, is determined in this paper. The probability density function (PDF) of the combiner output signal is derived. Then, the outage probability is numerically calculated using this PDF. The results are shown graphically to compare per...

The aim of delay-locked loop-based clock generator to generate a multiplied clock with a high frequency and wide frequency range. The proposed edge combiner achieves a high-speed and highly reliable operation using a hierarchical structure and an overlap canceller. By applying the logic to the pulse generator and multiplication-ratio control logic design, the frequency of the delay is determine...

Accurate computation of harmonics is really a challenging problem in power system. Many algorithms have been proposed for harmonic estimation. In this paper a novel hybrid approach is proposed to estimate the amplitudes and phases of fundamental, third and fifth harmonics of three different types of distorted power signals in presence of white noise. A robust estimator known as H∞ Filter is use...

This paper presents a wide range fast lock all-digital deskew buffer using a digital controlled delay line, which achieves low jitter, fast lock, low power consumption and 50% duty cycle correction. A cyclic time-to-digital converter is introduced to decrease the locking time in conventional register-controlled delay-locked loop. A balanced edge combiner to achieve 50% output clock is also pres...

We describe a multioctave power-combiner structure using finline arrays in an oversized coaxial waveguide. The spectral-domain method (SDM) is used to compute the propagation constant in this structure, and is verified with HFSS simulations. The SDM method is then employed to synthesize broad-band tapered impedance transformers in finline for coupling energy to and from a set of monolithic micr...

Manuscript Received 26-February-2013 and revised 23-June-2013 ISSN 2322-3936 Accepted on 2July-2013 Abstract— This paper proposes a two way L and S band Gysel power divider/combiner that uses line to ground resistors. Step by step methods to obtain a wide isolation and transmission bandwidth are presented. A design that uses five resistors is selected and optimized based on Quasi Newton method....

Decorrelate-and-forward relaying scheme for wireless synchronous code division multiple access (CDMA) networks where multiple sources communicate with a destination supported by multiple relays in flat Rayleigh fading channels is considered. By exploiting equicorrelated spreading sequences, a simple near–far resistant decorrelator together with a beamforming scheme at each relay and the maximal...

This paper presents the performance analysis results for dual hop MIMO mixed free space optical/radio frequency (FSO/RF) systems. The FSO system has been modeled by the Gamma-Gamma fading distribution under the intensity modulation with direct detection (IM/DD). The RF link experiences Nakagami-m fading. The FSO link utilizes equal gain combiner (EGC) and MRC has been used in the RF link. The e...

This paper describes a nonblind digital beamformer for SDMA (space division multiple access) systems used when channels are power-limited. An array antenna with many elements is usually required to obtain high antenna gain for the reception of a low-level desired signal and the degree of freedom for the spatial discrimination of many users using the same frequency. The proposed beamformer is de...