Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"radio channel"”.
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Joint Pose and Radio Channel Estimation
… thesis investigates the combination of pose and radio channel estimation. Pose is the knowledge of the position and orientation of a device whereas the radio channel describes the transmission medium between radio transmitters and receivers. The two subjects are both active research topics with a …
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Microcellular radio channel prediction using ray tracing
The radio interface greatly affects performance of wireless communication systems. Hard-wired communication links use transmission lines to connect communication terminals. The propagation characteristics of radio frequency signals on these transmission lines are well known. In wireless …
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Joint Positioning and Multipath Radio Channel Estimation and Prediction
… investigates the topic of joint positioning and radio channel estimation and prediction. Both positioning and radio channel estimation have a long history of research with many publications but the combination of the two has so far at large been left unexplored. The reason for studying this topic …
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Heterogeneous Acceleration for 5G New Radio Channel Modelling Using FPGAs and GPUs
L'abstract è presente nell'allegato / the abstract is in the attachment
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Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver
… presents research performed in the areas of radio wave propagation measurement and modeling, smart antenna arrays, and software-defined radio development. A four-channel, wideband, software-defined receiver was developed to serve as a test bed for wideband measurements and antenna array …
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Measured and Modeled Time and Angle Dispersion Characteristics of the 1.8 GHz Peer-to-Peer Radio Channel
… 3500 wideband power-delay profiles (PDPs) of the channel for a peer-to-peer communications system. Rural and urban areas are studied in 22 different transmitter-receiver links. The results are used to characterize the narrowband path loss, mean delay, root-mean-square (RMS) delay spread, and …
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An Introduction to Local Multipoint Distribution Services with an Investigation of the Effects of Vegetation on the Radio Channel
… through the aspects of millimeter (mm) wave radio link design. This should be a good lead into the experiment section, since it is suspected that the reader would want to be aware of what design techniques are involved in mm-wave radio link design and what issues may pose potential problems …
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Adaptive Equalization for Indoor Channels
… digital data is transmitted over a multipath radio channel. The equalization structures covered in this work are the linear transversal equalizer (LTE), the fractionally spaced equalizer (FSE), the decision-feedback equalizer (DFE), and the maximum-likelihood sequence estimation (MLSE) …
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Performance Evaluation of DECT in Different Radio Environments
… the performance of DECT in different channel conditions. DECT is simulated using the Signal Processing WorkSystem (SPW) software in different channels including the additive white Gaussian noise (AWGN) channel, the flat faded Rayleigh channel, the frequency selective faded Rayleigh …
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Theory of Stochastic Local Area Channel Modeling for Wireless Communications
… to the concepts and techniques of small-scale radio channel modeling. At the present time, there does not exist a comprehensive introduction and overview of basic concepts in this field. Furthermore, as the wireless industry continues to mature and develop technology, the need is now greater …
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An Integrated voice-data transmission system for private mobile radio
Private mobile radio services have experienced for a number of years congestion of the available spectrum. Although the release of Band III has contributed significantly to alleviating the spectrum shortage, it will however, not be sufficient to accommodate the projected growth in private mobile …
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Fixed Broadband Wireless Access Systems at Millimeter Wave Frequency
Millimeter radiowave systems offer an excellent means of creating a user and environment friendly scalable system that can be tailored economically as well as technically to small and large communities and provide a number of different services. In fact, the convergence of broadcast, communication …
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Performance of GMSK and 7/4-DQPSK Modulations in Land Mobile Radio Channels
… cellular systems respectively. The communication channel for the cellular systems is commonly referred to as the land mobile radio channel. The land mobile radio channel can be modeled as a frequency selective Rayleigh fading channel corrupted by additive white Gaussian noise. In addition to …
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Digital demodulation techniques for radio channels
… research is directed towards the Private Mobile Radio (PMR) networks, which play significant roles in taxi, police, ambulance and other such services. With an ever increasing need for data transmission, the current PMR systems which were designed for voice are not adequate. This research will …
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Physical layer DSP design of a wireless gigabit/s indoor LAN
… In particular, this thesis models the indoor radio channel environment at the 5.x GHz Unlicensed National Information Infrastructure (U-NII) frequency band, and proposes a multipath-resistant transceiver design based on Orthogonal Frequency Division Multiplexing (OFDM) with adaptive multilevel …
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A multistage RAKE receiver for CDMA systems
… priori information about the time-vary multipath radio channel. The thesis presents a mathematical description of the multistage receiver, and a software simulation of the receiver performance. A wide range of channel models are considered which include the effects of Gaussian noise, multipath …
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Adaptive reception for underwater communications
… In this type of wireless link, the radio channel is replaced by an underwater acoustic channel, which is strongly dependent on the physical properties of the ocean medium and its boundaries, the link geometry and the ambient noise. Traditional acoustic communications have involved a …
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Techniques for mitigating congestion in wireless sensor networks
… sensor networks, congestion causes overall channel quality to degrade and loss rates to rise, leads to buffer drops and increased delays (as in wired networks), and tends to be grossly unfair toward nodes whose data has to traverse a larger number of radio hops. Congestion control in wired …
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