In this work, Space-Time Block Coding (STBC) applied to improve performance of High Altitude Platforms (HAPs) for radio links is analysed. The communications scenario considers an aeronautical channel similar to the land mobile satellite channel model proposed in [6] which offers for medium and low angles of elevation from the ground station (worse coverage case) favourable multipath conditions...

With the revision of Air Pollution Control Act in Taiwan announced on 1 August 2018, several provisions or regulations have been added to strengthen control hazardous air pollutants (HAPs) from stationary sources. Therefore, this paper conducted a survey sixty toxic volatile organic compounds (VOCs) designated as HAPs and also performed comparison between some developed countries (i.e., USA, Ja...

Program is a joint effort between government and industry to develop a new generation of coal utilimtion processes. In 1986, the Ohio Power Company, a subsidiary of the American Electric Power Service Corporation (AEP), was awarded cofunding through the CCT program for the Tidd Pressurized Fluidixed Bed Combustor (PFBC) Demonstration Plant located in Brilliant, Ohio. The Tidd PFBC unit began op...

This paper proposes a novel beamforming technique to form an arbitrary-shaped cell for the high-altitude platforms (HAPs) mobile communications. The new technique is based on pattern summation of individual low-sidelobe, narrow beams which constitute the desired cell pattern weighted by an amplitude correcting function. The new cell pattern can be adapted to cover the main highways forming worm...

With various human clinical, epidemiological, and ex perimental data together with basic carcinogenesis ex perimentation, a working hypothesis of the development of cervical cancer is presented. Initiation may involve a carcinogen (perhaps herpesvirus type 2) altering the sus ceptible metaplastic cervical cell that is active in adoles cence and during pregnancy. Promotion by factors per haps re...

We investigate the possibility of multiple high altitude platform (HAP) coverage of a common cell area using a wideband code division multiple access (WCDMA) system. In particular, we study the uplink system performance of the system. The results show that depending on the traffic demand and the type of service used, there is a possibility of deploying 3–6 HAPs covering the same cell area. The ...

High altitude platforms (HAPs) have been designated as an alternative wireless infrastructure for facilitating next generation high-speed mobile communications services. This paper deals with the design and performance evaluation of a three-dimensional (3-D) sum-of-sinusoids statistical simulation model for HAP multiple-input–multiple-output Ricean fading channels. The performance of the simula...

The minimum requirements of the parameters such as the amplitude and phase distribution errors on an antenna aperture are obtained by using the statistical simulation method for 73 elements. From the results, appropriate beamformer method is selected. Instead of the full system, this paper presents the design and fabrication of the experimental model with 4 channel receivers and four linearly a...