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 8 of 8 for “"TIme-Varying Frequency"”.
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Time-Varying Frequency Selective IQ Imbalance Estimation and Compensation
… capabilities. Compensation techniques for frequency independent IQI arising due to gain and phase mismatches of the mixers in the I/Q paths of the transceiver have been widely discussed in the literature. However for wideband multi-channel transceivers, it is becoming increasingly important …
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Laser Frequency Stabilization With Pound-Drever-Hall Technique
Laser frequency stabilization is important in laser science and various researches requiring laser beams with high frequency precision. However, the changes in physical parameters of the lasers themselves and in the external environments often cause instability in the output frequency of the laser. …
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A Narrow-Linewidth Laser at 1550 nm Using the Pound-Drever-Hall Stabilization Technique
Linewidth is a measure of the frequency stability of any kind of oscillator, and it is a defining characteristic of coherent lasers. Narrow linewidth laser technology, particularly in the field of fiber-based infrared lasers, has progressed to the point where highly stable sources are commercially …
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Adaptive, Turbo-coded OFDM
… already combine techniques such as orthogonal frequency division multiplexing (OFDM) suitable for high data rate transmission with forward error correction (FEC) methods over wireless channels. In this thesis, we enhance the system throughput of a working OFDM system by adding turbo coding and …
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Modeling of nonstationary earthquake ground motion and biaxial and torsional response of inelastic structures
… model is proposed in which both intensity and frequency content are functions of time. Corresponding methods for estimating the model parameters based on actual earthquake records are also given. The proposed ground motion model can be efficiently applied to simulations as well as analytical …
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Use of Reinforcement Learning for Interference Avoidance or Efficient Jamming in Wireless Communications
… problem. The channel may induce multipath and time delays which lead to time-varying, frequency-selective attenuation. These factors are also influenced by the distance between the transmitter and receiver, the subbands the interference is located within, and the power of the transmitter. We …