Dual-Polarized Ricean MIMO Channels: Modeling and Performance Assessment

In wireless communication systems, dual-polarized (DP) instead of single-polarized (SP) multiple-input multiple-output (MIMO) transmission is used to improve the spectral efficiency under certain conditions on the channel and the signal-to-noise ratio (SNR). In order to identify these conditions, we first propose a novel channel model for DP mobile Ricean MIMO channels for which statistical channel parameters are readily obtained from a moment-based channel decomposition. Second, we derive an approximation of the mutual information (MI), which can be expressed as a function of those statistical channel parameters. Based on this approximation, we characterize the required SNR for a DP MIMO system to outperform an SP MIMO system in terms of the MI. Finally, we apply our results to channel measurements at 2.53 GHz. We find that, using the proposed channel decomposition and the approximation of the MI, we are able to reproduce the (practically relevant) SNR values above which DP MIMO systems outperform SP MIMO systems.Comment: submitted to the IEEE Transactions on Communication

Методичні вказівки до лабораторних робіт з курсу "Комп'ютерні мережі". Частина 1

Ця частина курсу присвячена вивченню загальних принципів створення локальних мереж і роботи мережі Інтернет. Вона містить 4 лабораторних роботи. Перша робота присвячена вивченню апаратури мережі Ethernet. У другій роботі вивчається настройка мережі Інтернет на ЄОМ користувача та застосування програм, які дозволяють аналізувати якість праці мережі.. Останні дві роботи вчать студентів аналізувати топологію мережі за допомогою програми tracert та особливостям налаштування роутінгових таблиць, які є основою протоколу IP

Понимание "субъективно-личностного" смысла как предпосылка обучения иноязычному общению

С позиций междисциплинарного подхода, а именно философских и педагогических изысканий, сделана попытка разрешения проблемы обучения иноязычному общению в связи с "субъективно-личностным" смыслом речевого сообщения

Опыт международного офиса НИУ ВШЭ в работе с иностранными учащимися

Анализируется опыт работы НИУ ВШЭ с иностранными учащимися, проблемы, возникающие при их обучении и адаптации, и способы их практического решения, выработанные НИУ ВШЭ

Применение технологии параллельных вычислений для оптимизации модели глобального освещения

Рассматривается математическая модель построения освещения в базисе сферических функций для трёхмерной сцены. Предлагается вариант распараллеленного предварительного расчёта коэффициентов разложения точек сцены по базису с применением технологии nVidia CUDA. Приводится сравнение производительности при счёте на центральных и графических процессорах

Learner-centered Approach in Teaching Foreign Language: Psychological and Pedagogical Conditions

The paper dwells on the psychological and pedagogical conditions of implementing learner-centered approach in teaching foreign language to engineering students at the Tomsk Polytechnic University. The concept of learner-centered approach in teaching foreign language was in detail pedagogically, psychologically and methodologically studied, foreign language teaching regulatory documents in the technical university were analyzed, teaching methods and learning outcomes in accordance with the existing English language teaching methodology were presented, results of the engineering students’ questionnairing and key techniques to improve teaching foreign language based on the learner-centered approach were proposed

Developing guidelines for riverfront developments for Malaysia

Rivers and water are important resources for human life, the environment and national development. In Malaysia, the importance of rivers as the focal point of cities was established from the early times of civilisation and will remain so. Population growth, economic growth, urbanisation and increased technology have transformed many Malaysian river systems from water industries into non water industries. Due to these changes, the functions of riverfront areas have also changed and the current pattern of riverfront development in Malaysia now focuses more on mixed-use development and recreation. To date, numbers of riverfront development projects are being developed in Malaysia for recreation, residential and mixed-use. Unfortunately, in most cases, the developments identified are not successful, having cost effects more than their economic value. Example are increases in water pollution indexes and rates of juvenile problems. The focus of this study was to identify the attributes of riverfront development, in order to develop guidelines for riverfront development for Malaysia. The findings of this study were based on interviews conducted with Government officers, Property developers, and the Waterfront community from three case study areas (qualitative phase), and from questionnaires mailed and e-mailed to property development companies listed under Bursa Malaysia (quantitative phase). The findings identified 18 attributes to be used in assisting developers when undertaking riverfront projects in the future. The attributes identified were then recommended to be used as guidelines of best practices of riverfront development in Malaysia