Microcellular Systems, Random Walks and Wave Propagation
ثبت نشده
چکیده
منابع مشابه
Propagation Prediction Model for Land Mobile Communication in Microcellular Environment
The propagation channel is the principal contributor to many of the problems and limitations that degrades the performance of mobile radio systems. One obvious example is multipath propagation which is a major characteristic of the mobile radio channels, which severely affects the performance of digital systems by reducing the carrier-to-interference ratio. Thus accurate characterization of the...
متن کاملA Quasi Three-dimensional Ray Tracing Method Based on the Virtual Source Tree in Urban Microcellular Environments
The increase in mobile communications traffic has led to heightened interest in the use of ray tracing (RT) methods together with digital building databases for obtaining more accurate and efficient propagation prediction in urban microcellular environments. In this paper, a novel quasi three-dimensional (3-D) RT algorithm is presented by taking into account the advantages of both the image the...
متن کاملMICROCELLULAR PROPAGATION CHARACTERISTICS Howard
To enhance the spectral efficiency and to improve service quality for cellular radio systems, a new microcellular system has been proposed [1-5] that operate over a relatively short radio path (on the order of 200 m to 1000 m), using relatively low antennas (about the same height as lamp posts), and transmitting at relatively low power (typically on the order of 10 m W). This new concept of mic...
متن کاملBit Error Probabilities of Ncfsk and Dpsk Signals in Microcellular Mobile Radio Systems
Introduction: To extend the present mediumjlarge cell mobile radio systems [I] towards ubiquitous communications, the microcellular approach looks promising [Z]. A major problem in cellular radio systems, regardless of having micro or mediumflarge cell architecture, is the presence of cochannel interference because of frequency reuse. Extensive studies on the effects of cochannel interference i...
متن کاملAn Active Different-Sized Cell Combination Method (ADCC) for Street Microcellular Systems
One effective way to make a large-capacity mobile communication system is to use a microcellular system. One way to do this is to place the base station antennas lower than the surrounding buildings. This result in what is called a street microcellular system. We previously presented basic simulation results evaluating the performance of a different-sized cell combination algorithm (DCC) design...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002