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Abstrak :
ABSTRAK
Seiring dengan kemajuan di bidang komunikasi data, kebutuhan akan pemakaian data bersama semakin meningkat terutama dalam suatu daerah lokal. Untuk memenuhinya dibuat suatu jaringan lokal (Local Area Network) agar dapat memakai bersama sumber daya yang tersedia dalam daerah tersebut. Novell's Netware merupakan suatu sistem operasi jaringan yang sering dugunakan pada LAN. Agar sistem ini dapat digunakan sebagai jaringan pengaksesan data bersama (multi user), diperlukan fasilitas-fasilitas pendukung yang dipergunakan untuk menghindari terjadinya Collision (tabrakan). Fasilitas itu diberikan antara lain oleh Clipper Compiler berupa pemakaian data secara bersama/pribadi serta locking (penguncian). Pada penelitian ini akan dibuat suatu perangkat lunak yang mampu mengubah sistem single user ke sistem multi user agar data dapat dipakai bersama dalam jaringan stasiun kerja Novell's Netware. Dengan adanya sistem data file ini maka setiap pemakai dapat mengakses data pada saat yang bersamaan tanpa perlu takut akan terjadinya collision.

Abstrak :
This book offers students, scientists and engineers an extensive introduction to the theoretical fundamentals of digital communications, covering single input single output (SISO), multiple input multiple output (MIMO), and time-variant systems. Further, the main content is supplemented by a wealth of representative examples and computer simulations. The book is divided into three parts, the first of which addresses the principles of wire-line and wireless digital transmission over SISO links. Digital modulation, intersymbol interference, and various detection methods are discussed; models for realistic time-variant, wireless channels are introduced; and the equivalent time-variant baseband system model is derived. Since not all readers may be familiar with this topic, Part II is devoted to the theory of linear time-variant systems. The generalized convolution is derived and readers are introduced to impulse response, the delay spread function, and system functions in the frequency domain. In addition, randomly changing systems are discussed. In turn, Part III deals with MIMO systems. It describes MIMO channel models with and without spatial correlation, including the Kronecker model. Both linear and nonlinear MIMO receivers are investigated. The question of how many bits per channel use can be transmitted is answered and maximizing channel capacity is addressed. Principles of space–time coding are outlined in order to improve transmission quality and increase data rates. In closing, the book describes multi-user MIMO schemes, which reduce interference when multiple users in the same area transmit their signals in the same time slots and frequency bands.

Abstrak :
This book presents comprehensive coverage of current and emerging multiple access, random access, and waveform design techniques for 5G wireless networks and beyond. A definitive reference for researchers in these fields, the book describes recent research from academia, industry, and standardization bodies. The book is an all-encompassing treatment of these areas addressing orthogonal multiple access and waveform design, non-orthogonal multiple access (NOMA) via power, code, and other domains, and orthogonal, non-orthogonal, and grant-free random access. The book builds its foundations on state of the art research papers, measurements, and experimental results from a variety of sources.