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.
Results
Showing 1 to 20 of 21 for “"Adaptive Equalization"”.
-
Adaptive Equalization for Indoor Channels
This thesis describes the use of adaptive equalization techniques to compensate for the intersymbol interference (ISI) that results when digital data is transmitted over a multipath radio channel. The equalization structures covered in this work are the linear transversal equalizer (LTE), the …
-
Adaptive equalization for modem constellation identification
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
-
Direct-form adaptive equalization for underwater acoustic communication
Adaptive equalization is an important aspect of communication systems in various environments. It is particularly important in underwater acoustic communication systems, as the channel has a long delay spread and is subject to the effects of time- varying multipath fading and Doppler spreading. The …
-
Direct-form adaptive equalization for underwater acoustic communication
Adaptive equalization is an important aspect of communication systems in various environments. It is particularly important in underwater acoustic communication systems, as the channel has a long delay spread and is subject to the effects of time- varying multipath fading and Doppler spreading. The …
-
A channel subspace post-filtering approach to adaptive equalization
… using both simulation and experimental data. An adaptive equalizer structure that explicitly uses this improved estimate of the channel impulse response is discussed. The improvement in performance of such an equalizer due to the use of the post-filtered estimate is also predicted theoretically, …
-
A channel subspace post-filtering approach to adaptive equalization
Thesis (S.M.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and the Woods Hole Oceanographic Institution), 2002.
-
Evaluation of vector sensors for adaptive equalization in underwater acoustic communication
… of signal arrival and the effect it has on equalization of the signal at degraded SNRs. It was demonstrated that utilizing a single vector sensor we were able steer to the direction of arrival and improve the ability of an equalizer to determine the transmitted signal. This improvement was …
-
Analysis of and techniques for adaptive equalization for underwater acoustic communication
… make high data-rate communication challenging. Adaptive decision feedback equalization is a common method to compensate for distortions introduced by the underwater acoustic channel. Limited work has been done thus far to introduce the physics of the underwater channel into improving and better …
-
Analysis of and techniques for adaptive equalization for underwater acoustic communication
… make high data-rate communication challenging. Adaptive decision feedback equalization is a common method to compensate for distortions introduced by the underwater acoustic channel. Limited work has been done thus far to introduce the physics of the underwater channel into improving and better …
-
Evaluation of vector sensors for adaptive equalization in underwater acoustic communication
… of signal arrival and the effect it has on equalization of the signal at degraded SNRs. It was demonstrated that utilizing a single vector sensor we were able steer to the direction of arrival and improve the ability of an equalizer to determine the transmitted signal. This improvement was …
-
Constrained Linear and Non-Linear Adaptive Equalization Techniques for MIMO-CDMA Systems
… from MAI and inter-symbol interference (ISI), equalization is needed to mitigate these effects. It is well known from the theory of constrained optimization that the learning speed of any adaptive filtering algorithm can be increased by adding a constraint to it, as in the case of the …
-
Simulation of adaptive equalization in two-ray, SIRCIM, and SMRCIM mobile radio channels
This work presents a study of the adaptive equalization techniques designed to improve the bit error rates of digital transmissions degraded by intersymbol interference in radio communication. This thesis considers the following structures: the linear transversal equalizer (LTE), the decision …
-
Equalization Techniques For Multipath Mitigation in Aeronautical Telemetry
<p>This thesis describes the application of adaptive equalization based on the constant modulus algorithm (CMA) and the decision-feedback minimum mean squared error (DF-MMSE) concept to the two compatible offset QPSK waveforms (FQPSK and SOQPSK-TG) that constitute the ARTM Tier-1 waveforms. An …
-
Acoustic data communication system for in-pipe wireless sensor networks
… Encoding, Barker Code Synchronization, Adaptive Equalization, Bandpass Filtering, Stacking and application of Inverse Transfer Function techniques. The robust performance of the proposed system is evaluated and verified by means of numerical simulations and scaled laboratory experiments.
-
Mobile Underwater Backscatter Networking
… decoding pipeline on the uplink that features adaptive equalization, polar coding, and an equalizer retraining mechanism. We implemented an end-to-end prototype of EchoRider and compared it to a state-of-the-art baseline. Our evaluation across more than 1,200 real-world experimental trials in …
-
An investigation into non-linear propagation of MSK with a view to specifying an adaptive equalizer
… in order to specify a suitable form of adaptive equalization. MSK is a coherent modulation technique, having improved spectral roll-off over FSK because it avoids the abrupt phase changes at the bit transitions. However computer simulations and field results indicate that MSK digital …
-
Graphical model driven methods in adaptive system identification
… as channel identification, echo cancellation and adaptive equalization demonstrate that the gains admitted by the graph framework are realizable in practice. The methods have wide applicability, and in particular show promise as the estimation and adaptation algorithms for a new breed of fast, …
-
Graphical model driven methods in adaptive system identification
… as channel identification, echo cancellation and adaptive equalization demonstrate that the gains admitted by the graph framework are realizable in practice. The methods have wide applicability, and in particular show promise as the estimation and adaptation algorithms for a new breed of fast, …
-
On Ways to Improve Adaptive Filter Performance
Adaptive filtering techniques are used in a wide range of applications, including echo cancellation, adaptive equalization, adaptive noise cancellation, and adaptive beamforming. The performance of an adaptive filtering algorithm is evaluated based on its convergence rate, misadjustment, …
-
Efficient tranceiver [sic] techniques for interference and fading mitigation in wireless communication systems
… to the received signal quality, techniques as equalization and diversity are usually employed in the system design. During the transmission, the phenomenon of inter-symbol interference (ISI) occurs at the receiver due to the time dispersion of the involved channels. Hence, several delayed …
Page 1 of 2