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The Space Division Multiple Access (SDMA) technique allows to increase the capacity of a mobile cellular system, exploiting the users spatial separation.This technique can be integrated with conventional access techniques, such as FDMA, TDMA and CDMA; therefore it can be used in all the mobile systems currently operated or to be introduced in the future. In this paper the SDMA technique is deep...

Static lookup tables as often used in the position calculation electronics in position sensitive detectors suffer from the well known problem that the propagation of digitization errors in the division leads to unequal efficiencies for the different output channels. In this paper we present a solution to the construction of such a lookup table which is optimal in the sense that the least possib...

In this paper we consider space-time codes where the code-words are restricted to either real or quaternion matrices. We prove two separate diversity-multiplexing gain trade-off (DMT) upper bounds for such codes and provide a criterion for a lattice code to achieve these upper bounds. We also point out that lattice codes based on Q-central division algebras satisfy this optimality criterion. As...

Horner’s method is a standard minimum arithmetic method for evaluating and deflating polynomials. It can also efficiently evaluate various order derivatives of a polynomial, therefore is often used as part of Newton’s method. This note tries to develop the various techniques called Horner’s method, nested evaluation, and synthetic division in a common framework using a recursive structure and d...

Long Term Evolution (LTE) is an advanced standard of the mobile communication systems. LTE has been developed by the 3 Generation Partnership Project (3GPP). The new features exhibited by LTE is a direct impact of applying new modulation and coding techniques such as the Orthogonal Frequency Division Multiplexing (OFDM) for the Downlink and the Single Carrier Frequency Division Multiple Access ...

Orthogonal frequency division multiplexing (OFDM) has been an effective technique to combat multipath fading in wireless communications. It has been successfully used for HF radio applications and has been chosen as the standard for digital audio broadcasting and digital terrestrial TV broadcasting in Europe and high-speed wireless local areas networks. In this paper an overview of a multiple c...

Newborn Screening for the diagnosis of Congenital Hypothyroidism (CH) was first started in Bangladesh 1999 by Immunoradiometric assay (IRMA). Dissociation enhanced lanthanide fluorescent immunoassay (DELFIA) 1986 due to its superior sensitivity, speed, and non-radioactive methodology. Auto DELFIA 1235 automatic system introduced In vitro Division National Institute Nuclear Medicine & Allied...

In addition to this aim, the study served another purpose of particular value to the Division of Special Education, in that it afforded a sample of the performance of normal sixth grade children. Every year there are referred to the psychological clinic of this division, thousands of children who are doing unsatisfactory work in the grades. It is of value to know how the performance of these ch...