Now showing items 21-40 of 42

    • DSP techniques for telecommunication systems 

      Huang, Yu-Chang (Graduate student of electrical engineering) (Northern Illinois University, 1995)
      Three digital signal processing (DSP) techniques for telecommunication systems are presented in this thesis. First, a single-channel speech enhancement technique using spectral subtraction algorithm is presented. This ...
    • Dual-channel equalization and cross talk cancellation for audio applications 

      Canfield, Gregory H. (Northern Illinois University, 1997)
      Three-dimensional sound effects depend on psychoacoustic spectral and phase cues being present in a reproduced signal. Cross-talk cancellation and dual-channel equalization using an adaptive filter network have the potential ...
    • An effective approach in generating efficient software for digital signal processors 

      Ma, Kuanchung (Northern Illinois University, 1989)
      This thesis presents the development process and implementation procedure of a code-generator software utility that can be used to generate optimized assembly programs for implementing adaptive filters on a digital signal ...
    • An efficient multiprocessor implementation of the fast transversal filter 

      Schaller, Lane B. (Northern Illinois University, 1989)
      The purpose of this project was to design and develop an efficient multiprocessor system to implement the Fast Transversal Filter (FTF) using commercially available microprocessors. The system was also designed with some ...
    • Error-path modeling technique for active transformer noise control system and residual noise shaping experiments 

      Jiang, Xuhua (Northern Illinois University, 1994)
      This thesis concentrates on error-path modeling techniques with active noise control (ANC) applications. A new error-path modeling technique for an active transformer noise control (ATNC) system and an on-line error-path ...
    • Fast convergence techniques for active noise control systems 

      Char, Kavita (Northern Illinois University, 1994)
      This thesis investigates various fast convergence adaptive algorithms for an active noise control (ANC) application. The traditional filtered-X LMS algorithm has been implemented first, and its performance compared with ...
    • Feedback active noise control systems 

      Vijayan, Dipa (Northern Illinois University, 1994)
      The research work of this thesis concentrates on feedback active noise control (FANC) systems. The FANC system uses error sensor(s) to perform cancellation and thus avoids the acoustic feedback effect inherent to traditional ...
    • Frequency domain adaptive signal processing 

      Li, Xu (Reed Lee) (Northern Illinois University, 1989)
      In an effort to explore a better approach to improve the performance of frequency domain adaptive filter, a new transform, the Fast Hartley Transform (FHT), is proposed for the transform domain adaptive filter. This new ...
    • Frequency domain digital hearing aid 

      Voepel, Steven (Northern Illinois University, 1992)
      This thesis presents frequency domain techniques based upon relatively new transforms, called lapped transforms, for utilization in a digital hearing aid. The lapped transform promotes this new frequency domain digital ...
    • Frequency-domain periodic active noise control and equalization systems 

      Ji, Li, (Graduate student of engineering) (Northern Illinois University, 1995)
      The time-domain waveform synthesis method for periodic active noise control (ANC) can be implemented using the impulse train as the reference signal. The time- domain periodic ANC was first implemented and analyzed in this ...
    • Integrated audio and automotive signal processing system 

      Gupta, Uday (Northern Illinois University, 1996)
      An integrated acoustical signal processing system, which provides adaptive noise cancellation (ANC) and acoustic echo cancellation (AEC) for handsfree cellular phones and adaptive active noise control (AANC) inside automobile ...
    • Integrated full-duplex speaker-phone system with a subband adaptive noise canceler 

      Mallela, Padma P. (Northern Illinois University, 1995)
      This thesis presents the design and implementation of a full-duplex speaker-phone system. The existing acoustic echo and line echo are reduced by using adaptive filtering techniques. In this study, the system hardware and ...
    • Measurement noise in feedback active noise control systems 

      Srinivasa, Anupama (Northern Illinois University, 1999)
      The works presented in this thesis focus on the occurrence and effects of measurement noise in feedback active noise control (ANC) systems and propose a new feedback ANC algorithm. In feedback ANC systems, instead of ...
    • Narrowband active noise control and equalization algorithms 

      Ji, Minjiang (Northern Illinois University, 1993)
      The research in this thesis attacks some obstacles in Active Periodic Noise Control (APNC) applications to realize new system functions or to improve system performance. Active noise equalization emerges to meet human ...
    • On-line modeling and feedback compensation techniques for 3-D active noise control systems 

      Luan, Jian (Northern Illinois University, 1993)
      The research work of this thesis concentrates on the three-dimensional (3-D) environment, which is a model of the real open rollover protection tractor. Threedimensional adaptive active noise control algorithms have been ...
    • On-line modeling techniques for active noise control in the duct 

      Chyan, Yann-Guang (Northern Illinois University, 1992)
      An Active Noise Control (ANC) system uses an adaptive cancellation filter to generate a secondary noise to cancel the primary noise. The adaptation algorithm used in the ANC system is the filtered-U RLMS algorithm, which ...
    • Out-of-band overshoot in narrowband active noise control system 

      Chen, Shaojie (Northern Illinois University, 1997)
      Acoustic noise problems become more and more evident as increased numbers of large industrial equipment such as engines, blowers, fans, transformers, and compressors are being employed. Active noise control (ANC), in which ...
    • Stabilization of fast transversal filter and periodic noise-cancellation application 

      Chen, Liang (Northern Illinois University, 1990)
      This thesis presents a new rescue technique to stabilize the Fast Transversal Filter (FTF) using the most efficient Recursive Least Squares (RLS) algorithm, and also introduces an active periodic noise cancellation using ...
    • A symmetric crosstalk-resistant adaptive noise canceler and its application 

      Peng, Weimin (Northern Illinois University, 1993)
      The performance of a Crosstalk-Resistant Adaptive Noise Canceler (CTRANC) previously proposed by other researchers has been scrutinized and found flawed in dealing with various noise orientations. Quantitative data and ...
    • Three dimensional active noise control with integrated audio capabilities 

      Finn, Brian Michael (Northern Illinois University, 1992)
      Active Noise Control (ANC) in three dimensional space is the basis for investigations presented in this work. In an effort to expand and broaden the applicability of active noise control, new concepts of an integrated audio ...