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  • Nonlinear approach to the direction finding problem in array processing

    Creator:
    Ill-keun Rhee
    Abstract:
    In sonar or radar array processing, one of the most important objectives is to estimate the angles of incidence of distant source signals in a noisy environment. The standard eigenstructure-based method, which is known to yield high resolution spectral estimates for solving the direction finding problem, relies on the assumption...
    Resource Type:
    Dissertation
    Full Text:
    -known multiple signal classification (MUSIC) technique is shown as an example of the FCNI, using a

  • A comparison of two types of zero-crossing FM demodulators for wireless receivers

    Creator:
    McNeal, Jeff D.
    Abstract:
    A comparison of two novel demodulators. The first is a basic zero crossing demodulator, as introduced by Beards. The second is an approach proposed by Hovin. The two demodulators are compared to each other and to the conventional method of demodulation.
    Resource Type:
    Masters Thesis
    Full Text:
    there are several different factors that deteriorate the output signal quality. First for a digital

  • Interpolation-based digital quadrature frequency synthesizer

    Creator:
    Larson, Ryan John
    Abstract:
    Traditionally sinusoidal signal generation has been implemented with purely analog circuits such as phase-locked loops. The alternative of using a digital system to perform this signal generation has previously been unattractive due to limitations in clock frequency and size. However, recent advancements in sub-micron fabrication techniques have made the digital...
    Resource Type:
    Masters Thesis
    Full Text:
    SYNTHESIZER 1. INTRODUCTION Carrier-signal generation is one of the common features in modern digital com­

  • Adaptive dual-loop algorithm for cancellation of time-varying offsets in direct conversion mixers

    Creator:
    Holenstein, Christian
    Abstract:
    The thesis presents a new algorithm and structure that is to be used in conjunction with a specially modified CMOS Gilbert cell mixer to remove time-varying DC offsets in direct conversion receivers. In our approach, the DC offset is detected at the output of the mixer using a dedicated coarse...
    Resource Type:
    Masters Thesis
    Full Text:
    apply a digital cancellation algorithm to the sampled signal before the decision device [4], [5]. In

  • Efficient digital predistortion techniques for power amplifier linearization

    Creator:
    Zhuo, Min
    Abstract:
    The importance of spectral efficiency in mobile communications often requires the use of non-constant-envelop linear digital modulation schemes. These modulation techniques carry signal information in both magnitude and phase, thus they must be linearly amplified to avoid nonlinear signal distortion which is not correctable in a typical receiver. A second...
    Resource Type:
    Masters Thesis
    Full Text:
    the development of the very large-scale integra- tion(VLSI), digital signal processing(DSP

  • A comparative study between sinusoidal and squarewave clocking for alleviating the jitter limitation in multi-gigaHertz ADCs

    Creator:
    Kesharwani, Divya
    Abstract:
    Various applications like wireless UWB communication, fast data acquisition systems and digital storage oscilloscopes needs ADCs with instantaneous input signal bandwidth from 0.1-40 GigaHertz range with 6-10 bits of resolution -- a challenging task and an impressive goal to achieve. Flash ADCs have been conventionally employed to achieve these goals...
    Resource Type:
    Masters Thesis
    Full Text:
    digital signal processing technique mainly depends upon the quality of the digital input data given to

  • Design and FPGA implementation of digital transmission over severe ISI channels

    Creator:
    Zhao, Yichen
    Abstract:
    Inter-symbol interference is one of the major factors that make the realization of high-data-rate digital communications system complex. Current designs face two main challenges: how to efficiently utilize the available bandwidth and how to reduce the hardware complexity of the transmitter and receiver. Traditional solutions use a single-band architecture. When...
    Resource Type:
    Masters Thesis
    Full Text:
    connectivity, signal processing and embedded processing resources. The abundant interface helps FPGA to

  • Optimum quantization for the adaptive loops in MDFE

    Creator:
    Parthasarathy, Priya
    Abstract:
    Multi-level decision feedback equalization (MDFE) is a sampled signal processing technique for data recovery from magnetic recording channels which use the 2/3(1,7) run length limited code. The key adaptive feedback loops in MDFE are those which perform the timing recovery, gain recovery, dc offset detection, and adaptive equalization of the...
    Resource Type:
    Masters Thesis
    Full Text:
    a sampled signal processing technique for data recovery from magnetic recording channels which use

  • Synthesis of multi-rate arrays from directional uniform recurrence equations

    Creator:
    Li, Aihua
    Abstract:
    Advances in VLSI array processing have led to many new parallel structures for real-time Digital Signal Processing (DSP) applications. Among all the architectures, systolic arrays have played an important role because systolic arrays have regular, local interconnections with modular structure. In ordinary systolic arrays, however, all processing operations and data...
    Resource Type:
    Masters Thesis
    Full Text:
    array processing have led to many new parallel structures for real-time Digital Signal Processing (DSP

  • Evaluation of UWB techniques for indoor position locationing

    Creator:
    Chou, Tai Chian
    Abstract:
    Time of Arrival (TOA) is a popular technique used for geolocation. This thesis evaluates the use of TOA techniques indoors. The accuracy of measuring distances using TOA is dependent on the bandwidth of the system and the multipath conditions between the receiver and transmitter. System bandwidth has a significant effect...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.2. Received Signal Strength (RSS) Technique . . . . . . . . . . . . . . . 3 1.2.3. Angle of