We study some structural properties of Construction-A lattices obtained from low density parity check (LDPC) codes over prime fields. Such lattices are called low density Construction-A (LDA) lattices, and permit low-complexity belief propagation decoding for transmission over Gaussian channels. It has been shown that LDA lattices achieve the capacity of the power constrained additive white Gau...

In this paper, a recursive least squares (RLS) based blind adaptive beamforming algorithm that features a new variable forgetting factor (VFF) mechanism is presented. The beamformer is designed according to the constrained constant modulus (CCM) criterion, and the proposed adaptive algorithm operates in the generalized sidelobe canceler (GSC) structure. A detailed study of its operating propert...

This paper deals with estimating the frequency of sinusoidal signal buried in broad band noise. The simple unbiased indirect frequency estimation (IFE) algorithm is proposed for a second-order adaptive finite impulse response (FIR) notch filter with constrained zeros. The technique of estimating input noise variance is employed to remove the bias existing in the estimated filter parameter. Also...

In this paper, a transform domain normalised partially decoupled LMS (TP-LMS) algorithm is proposed based on the partially decoupled transform domain Volterra filter. It is formulated by applying an orthogonal transform to the first order of the partially decoupled Volterra filter, in which the filter weights of a given order are optimised independently of those in the higher order. This approa...

enterprise (MSE) sector for the growth and development of economies in the Pacific subregion and on the other, the financing constraints of the sector, the authors surveyed a group of MSEs in a Pacific island country and found that the sector may be particularly constrained by bank interest rates, fees and charges, and collateral requirements. This situation holds implications for policy, and t...

In this paper, a recursive least squares (RLS) based blind adaptive beamforming algorithm that features a new variable forgetting factor (VFF) mechanism is presented. The beamformer is designed according to the constrained constant modulus (CCM) criterion, and the proposed adaptive algorithm operates in the generalized sidelobe canceler (GSC) structure. A detailed study of its operating propert...

The dispoportionate dropout rate of female college students from math, science, and engineering (MSE) fields has recently received much attention (Brainard, Laurich-McIntyre, 6' Moblqr, 1995; Carlin, 1997). The reasons far women 's higher attrition rate from MSE fields remain unclear. Eighty lstyear university students with apeexisting interest in MSE complehd a computer task-the Implicit Assoc...