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 9 of 9 for “"Ricean"”.
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Retransmission strategies for moving networks over ricean fading channels
… Repeat reQuest (HARQ) for moving networks over Ricean fading channels has been considered. The scenario of interest consists of one receiver traveling at a given speed while connected to a wireless network based on OFDM (e.g., WiMax) through several base stations located along the path. Five …
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On performance analysis of optimal diversity combining with imperfect channel estimation
… is investigated for multipath Rayleigh and Ricean fading channel with additive white Gaussian noise where only imperfect channel knowledge is available at the receiver. The non-observable estimation error contributes as an additive source of noise which is not white. Therefore, the optimal …
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New Results on Selection Diversity over Fading Channels
… frequency non-selective Rayleigh, Nakagami-m and Ricean fading channels. Aside from the classical selection diversity, generalized selection combining and the "maximum output" selection methods, two new selection rules based on choosing the branch providing the largest magnitude of log-likelihood …
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Performance Evaluation of DECT in Different Radio Environments
… selective faded Rayleigh channel, and the Ricean channel. The effect of cochannel and adjacent channel interference is also investigated. In order to quantify the RF channel dispersive properties, and other parameters that determine performance in a radio channel, channel impulse response …
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Frequency reuse through RF power management in ship-to-ship data networks
… the bit error rate (BER) of a QPSK system in a Ricean fading channel with one co-channel interferer. The simulation generates plots of energy per bit to one sided noise power spectral density ratio (Eb/N0) versus BER. Simulation results are used to compute the minimum range (R) at which the …
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Contributions to a Context-Aware High Sensitivity GNSS Software Receiver
… is optimistic; in contrast, it is found that the Ricean K-factor, can detect outdoor-to-indoor transitions by capturing the C/N0 variation due to multipath fading and allow the receiver to adjust the processing strategy before the transition happen.
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Προσαρμογή παραμέτρων δέκτη στις αλλαγές ποιότητας μετάδοσης για ασύρματες επικοινωνίες ευρείας ζώνης με εφαρμογή σε συστήματα πολυπλεξίας με ορθογώνιες συχνότητες
… καθυστέρησης και ο συντελεστής Κ του καναλιού Ricean και να αναπτυχθούν αλγόριθμοι εκτίμησης για κάθε έναν. Μέσω των προτεινόμενων αλγορίθμων το σύστημα θα μπορεί να εκτιμήσει τις συνθήκες μετάδοσης και να προσαρμοστεί κατάλληλα. Ο δεύτερος στόχος της διατριβής είναι η μελέτη της ακριβούς …
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Radio Wave Propagation Measurements and Modeling for Land Mobile Satellite Systems
The performance of a mobile satellite communications link is conditioned by the characteristics of the propagation path between a satellite and mobile users. The most important propagation effect in land mobile satellite system is roadside attenuation of the signals due to vegetation or urban …