Sökning: "large scale fading"

Visar resultat 1 - 5 av 23 avhandlingar innehållade orden large scale fading.

  1. 1. Verification of wireless communication performance and robustness for automotive applications

    Författare :Mikael Nilsson; Kommunikationsteknologi; []
    Nyckelord :Vehicle-to-Vehicle; V2V; channel modeling; path loss; two-ray; obstruction; large scale fading; shadow fading; multiple links; diversity; correlation; over-the-air; OTA; multi-probe; multipath propagation simulator; fading emulation;

    Sammanfattning : Today's test methods used for verifying the performance and robustness of automotive applications using wireless communication are often based on fieldtrails, which are time consuming, costly, and not repeatable. Therefore, there is an urgent need for new verification methods that can be performed in lab environment, where the realistic radio propagation environment can be emulated. LÄS MER

  2. 2. Path Dependence and Path Shaping : Unearthing institutional dynamics in large-scale project organizing

    Författare :Ermal Hetemi; Cali Nuur; Anna Jerbrant; Sofia Pemsel; KTH; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Large-scale project organizing; complexity; Organizational Project Management; Institutional theory; Path Dependence; Path creation; Process studies; Industriell ekonomi och organisation; Industrial Economics and Management;

    Sammanfattning : Over the last two decades, large-scale project endeavors or major programs that typically deliver a substantial physical infrastructure or a complex product with a lifetime that can extend for decades and across industries have become the norm for many utility sectors, such as transport, energy, water, or food. The allure of ever-larger projects shows no sign of fading away in the face of sustainable development and grand societal challenges – quite the contrary. LÄS MER

  3. 3. MIMO Systems with Residual Hardware Impairments

    Författare :Xinlin Zhang; Chalmers University of Technology; []
    Nyckelord :training length.; residual hardware impairments; large-scale MIMO; Achievable rate; channel estimation; channel capacity; energy efficiency;

    Sammanfattning : Recent years have witnessed an unprecedented explosion in mobile data traffic, due to the expansion of numerous types of wireless devices, which have enabled a plethora of data-hungry applications. Novel techniques, such as large-scale multiple-input multiple-output (MIMO) systems, represent potential candidates to support the ever-growing demands. LÄS MER

  4. 4. On Radio Wave Propagation Measurements and Modelling for Cellular Mobile Radio Networks

    Författare :Erik Östlin; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Field strength measurements; path loss prediction; point-to-area; Recommendation ITU-R P.1546; artificial neural network; large- and small-scale fading characteristics;

    Sammanfattning : To support the continuously increasing number of mobile telephone users around the world, mobile communication systems have become more advanced and sophisticated in their designs. As a result of the great success with the second generation mobile radio networks, deployment of the third and development of fourth generations, the demand for higher data rates to support available services, such as internet connection, video telephony and personal navigation systems, is ever growing. LÄS MER

  5. 5. Analysis of Cellular and Cell-Free Massive MIMO with Rician Fading

    Författare :Özgecan Özdogan; Emil Björnson; Erik G. Larsson; Sofie Pollin; Linköpings universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The data traffic in cellular networks has grown at an exponential pace for decades. This trend will most probably continue in the future, driven by new innovative applications. One of the key enablers of future cellular networks is the massive MIMO technology. A massive MIMO base station is equipped with a massive number (e. LÄS MER