Sökning: "Transmitted reference"
Visar resultat 11 - 15 av 40 avhandlingar innehållade orden Transmitted reference.
11. Control of sexually transmitted infections in a high prevalence region : HIV, syphilis and HBV among young adults and preparation for HIV vaccine trials in Mozambique
Sammanfattning : Mozambique is one of the countries with a high burden of human immunodeficiency virus (HIV), hepatitis B virus (HBV) and syphilis. HIV seroprevalence in adults was estimated to be 11.5% in 2009, syphilis prevalence among women was estimated to be 5.7% in 2010 and an estimated national HBV prevalence of above 8%. LÄS MER
12. An electronic warfare perspective on time difference of arrival estimation subject to radio receiver imperfections
Sammanfattning : In order to ensure secure communication in digital military radio systems, multiple methods are used to protect the transmission from being intercepted by enemy electronic warfare systems. An intercepted transmission can be used to estimate several parameters of the transmitted signal such as its origin (position or direction) and of course the transmitted message itself. LÄS MER
13. Blind Massive MIMO Base Stations : Downlink Transmission and Jamming
Sammanfattning : Massive MIMO (Multiple-Input--Multiple-Output) is a cellular-network technology in which the base station is equipped with a large number of antennas and aims to serve several different users simultaneously, on the same frequency resource through spatial multiplexing. This is made possible by employing efficient beamforming, based on channel estimates acquired from uplink reference signals, where the base station can transmit the signals in such a way that they add up constructively at the users and destructively elsewhere. LÄS MER
14. Studies of Three Different Methods to Estimate the Up-link Performance of Mobile Phone Antennas
Sammanfattning : Antennas play an important role in determining the overall radio performance for wireless communications. If all other radio components perform according to their specifications, the performance of a mobile phone can be entirely determined by measuring the efficiency of its antenna. LÄS MER
15. Digital block transmission and time-of-flight estimation : receiver design and performance analysis
Sammanfattning : This thesis is concerned with signal processing aspects of digital block transmission and time-of-flight estimation. Receivers are derived and analysed based on the assumption that the received signals have been corrupted with additive Gaussian noise and linear distortion. LÄS MER