منابع مشابه
3D Ellipsoidal Model for Mobile-to-Mobile Radio Propagation Environments
Geometrical models are mostly used for the study and analysis of the characteristics of radio communication channels. In this paper, a three-dimensional semi-ellipsoidal scattering model is proposed for mobile-to-mobile communication channels, where uniformly distributed scatterers are assumed to be confined within the semi-ellipsoids around mobile stations. The semi-ellipsoidal shape with adju...
متن کاملIntroduction to Mobile Radio Propagation and Characterization of Frequency Bands
The term wireless communication refers to transfer of information via electromagnetic or acoustic waves over atmospheric space rather than along a cable. The apparent wrinkle between such a scheme and conventional wired systems is the presence of the wireless channel as the medium over which the communication must take place. Unfortunately, more often than not, this medium is hostile in regards...
متن کاملSimulating Signal Propagation Effects of the Mobile Radio
The ability to simulate various mobile radio channel impairments, particularly, multipath fading, in the products design phase, before equalizer algorithms have been implemented as custom ASICs, is critical. This paper presents the test procedure, developed for type-approval testing of a multipath fading simulator, as well as corresponding practical measurement results in terms of spurious sign...
متن کاملMobile Radio Propagation Simulation Based on Ray-Tracing Method
あらまし レイトレーシング法は送信点から受信点に到達するレイを幾何学的にトレースするだけで電波伝搬 をシミュレートでき,移動通信のシステム設計やエリア設計に必要な伝搬諸特性を一元的に推定できる魅力的な 方法である.しかし,高精度な結果を得るためには形状と材質(電気的特性)に関する詳細な構造物データを必 要とする.また,広範囲にわたる多くの構造物を対象に相互作用回数(反射,回折,透過)の多いレイをトレー スしなければならず,演算に多くの時間を要する.本論文では,筆者らが開発した市街地マクロセル対応のレイ トレーシングシステムの概要を述べる.本システムには演算処理の高速化を実現するために筆者らが提案してい る様々な高速化技術が適用されている.また,本論文では市街地の実測データと比較することにより本システム の演算時間と推定精度を評価し,本システムが実用に資するものであることを明らかにする...
متن کاملMeasurement and Identification of Mobile Radio Propagation Channels
MIMO vector radio channel sounding devices allow multidimensional analysis of wave propagation in mobile radio channels. 6-dimensions represent Doppler, TDOA, 2-D DOD and 2-D DOA. Antenna array architectures, calibration and K-D unitary ESPRIT parameter estimation are discussed. Parametric channel models can be derived from the estimated data.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of The Institute of Image Information and Television Engineers
سال: 2016
ISSN: 1342-6907,1881-6908
DOI: 10.3169/itej.70.910