# 2011 Digital Signal Processing and Signal Processing Education Meeting (DSP/SPE)

## Filter Results

Displaying Results 1 - 25 of 99
• ### [Front cover]

Publication Year: 2011, Page(s): c1
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• ### [Title page]

Publication Year: 2011, Page(s): i
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Publication Year: 2011, Page(s): ii
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• ### Organizing committee

Publication Year: 2011, Page(s):iii - iv
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Publication Year: 2011, Page(s):v - xiv
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• ### Non-stationary interference mitigation in continuous phase modulated signals using estimation subtraction

Publication Year: 2011, Page(s):1 - 6
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Mitigating non-stationary narrowband interference from a continuous phase modulation (CPM) signal is a challenge due to the correlation present in CPM signal samples. For such a scenario, use of a time-varying linear prediction error filter (TVLPEF) based on a decorrelating time-varying autoregressive (DTVAR) model was proposed earlier. TVLPEF based mitigation of the interference from a CPM signal... View full abstract»

• ### Improved post-Demodulator adaptive filter for FSK signals in a multipath environment

Publication Year: 2011, Page(s):7 - 12
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Although the use of CMA filters to equalize multipath channels for FSK signals is well understood, empirical tests have suggested that in some environments an LMS filter positioned after the demodulator could provide similar performance improvement with lower computational cost. Theoretical analysis of this nonlinear configuration has been hindered by the complex interaction of the system and sign... View full abstract»

• ### The dependence of the thumbtack shape of the auto-ambiguity of frequency-hop waveforms on the number of hops and time-bandwidth product

Publication Year: 2011, Page(s):13 - 17
Cited by:  Papers (1)
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In this work we consider the impact of the number of hops of a frequency hopped code on the autocorrelation surfaces it produces. First, we review two common choices for the number of hops, namely the Minimal Sidelobe Region' (MSR) choice, and the Nyquist' choice. The MSR method ensures that peaks in the sidelobe region are small, while the Nyquist method exhibits much cleaner center region beha... View full abstract»

• ### Practical OFDM channel estimation method with Kalman filter theory

Publication Year: 2011, Page(s):18 - 23
Cited by:  Papers (1)
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This paper proposes the practical OFDM channel estimation method with only Kalman filter theory. The method aims to achieve robust OFDM channel estimation from the canonical state space models with (i) a state equation composed of the channel gain and (ii) an observation equation composed of the pilot signal, the channel gain, and the additive noise. The remarkable features of this method are that... View full abstract»

• ### Distributed SNR estimation using constant modulus signaling over Gaussian multiple-access channels

Publication Year: 2011, Page(s):24 - 29
Cited by:  Papers (2)
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A sensor network is used for distributed SNR estimation. Sensors observe a signal embedded in noise. These observations are phase modulated using a constant-modulus scheme and transmitted over a Gaussian multiple-access channel to a fusion center. At the fusion center, the location parameter and scale parameter are estimated using a minimum-variance estimator as well as computationally simple alte... View full abstract»

• ### A wideband spectrum sensing method for cognitive radio using sub-Nyquist sampling

Publication Year: 2011, Page(s):30 - 35
Cited by:  Papers (10)
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Spectrum sensing is a fundamental component in cognitive radio. A major challenge in this area is the requirement of a high sampling rate in the sensing of a wideband signal. In this paper a wideband spectrum sensing model is presented that utilizes a sub-Nyquist sampling scheme to bring substantial savings in terms of the sampling rate. The correlation matrix of a finite number of noisy samples i... View full abstract»

• ### Null sub-carrier based carrier frequency offset estimation for OFDMA uplink systems

Publication Year: 2011, Page(s):36 - 41
Cited by:  Papers (3)
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We propose a null sub-carrier based carrier frequency offset (CFO) estimation technique for OFDMA uplink systems. We discuss the effect of multi-user interference and channel nulls on the identifiability of CFO estimation. We also derive the CFO acquisition range of the algorithm and the optimum location of the null sub-carriers. We prove that the identifiability due to multi-user interference is ... View full abstract»

• ### Adaptive maximal asymptotic efficiency equalization using constellation mapping

Publication Year: 2011, Page(s):42 - 47
Cited by:  Papers (1)  |  Patents (1)
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The focus of this paper is the extension of maximum asymptotic efficiency (MAE) equalization for application to time-varying communication channels. While the asymptotically optimal MAE equalizer is very attractive in its low runtime complexity, it suffers from high (exponential in channel and equalizer length) design complexity. Frequent redesign renders the effective operational complexity of th... View full abstract»

• ### Practical Volterra equalizers for wideband satellite communications with TWTA nonlinearities

Publication Year: 2011, Page(s):48 - 53
Cited by:  Papers (5)  |  Patents (1)
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In this paper we consider the performance of Volterra filters in canceling the severe nonlinear amplitude and phase distortions caused by traveling wave tube (TWT) high power amplifiers (HPAs, TWTAs) typically used on many legacy satellite communication systems. The nonlinear nature of Volterra filters would seem to make them a natural choice for canceling intersymbol interference (ISI) resulting ... View full abstract»

• ### On the frequency-domain properties of Savitzky-Golay filters

Publication Year: 2011, Page(s):54 - 59
Cited by:  Papers (6)
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This paper is concerned with the frequency-domain properties of the so called Savitzky-Golay lowpass filters, which are based on the principle of local least-squares fitting of a polynomial. A summary of the important frequency-domain properties is given along with an empirically-derived formula for 3 dB cutoff frequency as a function of polynomial order N and impulse response half-length M. View full abstract»

• ### Design of high order FIR Unimodular Filter Banks and its application in combatting instantaneous erasures

Publication Year: 2011, Page(s):60 - 65
Cited by:  Papers (1)
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FIR Unimodular Filter Banks (UFBs) offer the minimum possible delay among all the filter banks with the same downsampling rate. Although Order-one UFBs can be factorized into degree-one unimodular matrices, this factorization is not possible for higher order UFBs. This is unfavorable because in most applications, banks with longer length filters result in better performance. In this paper, we inve... View full abstract»

• ### Stochastic constructions of equiangular tight frames

Publication Year: 2011, Page(s):66 - 71
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Equiangular tight frames have applications in communications, signal processing, and coding theory. Previous work demonstrates that few real equiangular tight frames exist for most pairs (n,d). This work compares three stochastic solutions to the frame design problem, specifically, the problem of designing real equiangular tight frames by minimizing the subspace minor angle sum-squared error. Nume... View full abstract»

• ### Development and testing of wavelet packet transform-based detector for ice accretion on wind turbines

Publication Year: 2011, Page(s):72 - 77
Cited by:  Papers (8)
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This paper introduces a novel method for detecting ice accumulation on wind turbines. The proposed detection method is based on utilizing a multi-resolution analysis to extract specific frequency components present in the direct and quadrature components of the electric current flowing out of a wind generator. The basis of the proposed method lies in the fact that ice accumulation leads to a slow ... View full abstract»

• ### Truncated Fast Fourier Transform algorithms

Publication Year: 2011, Page(s):78 - 83
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It is well known that the convolution of two signals is equivalent to the multiplication of two polynomials. Fast polynomial multiplication can be implemented by evaluating the two input polynomials at a collection of points, multiplying the polynomial evaluations, and then interpolating the results into the product polynomial. In 2004 and 2005, van der Hoeven introduced algorithms which efficient... View full abstract»

• ### Introducing signals and systems concepts through analog signal processing first

Publication Year: 2011, Page(s):84 - 89
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In this work it is proposed to introduce signals and systems concepts through the first course on analog signal processing, with an integrated laboratory component. The course structure, the associated experiments, and experimental results for some experiments conducted is presented. The experiments include addition, multiplication of two signals, observing the impulse and step response of LTI sys... View full abstract»

• ### Introductory signal processing labs based on filterbank applications

Publication Year: 2011, Page(s):90 - 94
Cited by:  Papers (1)
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Filterbank implementations and simulations can be used successfully in introductory signal processing lab courses by avoiding some of the analytical complexities and focusing on real-world applications. One excellent area is human hearing where the cochlea is well modelled by a filterbank. A lab project that simulates a cochlear implant (CI) combines elements of signal processing with biomedical e... View full abstract»

• ### DSP experiments and design projects in an introduction to ECE course at the American university of Beirut

Publication Year: 2011, Page(s):95 - 100
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A new course named Introduction to Electrical and Computer Engineering was introduced in 2006 in the ECE department at the American University of Beirut. During this course students are exposed to different fields in the electrical and computer engineering disciplines. The main objectives of the course are to equip students with the basic tools to develop problem solving techniques, as well as des... View full abstract»

• ### Digital communication with jamming experiments for a signal processing first course

Publication Year: 2011, Page(s):101 - 106
Cited by:  Papers (1)
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In this paper we provide the details of a final project in digital communications, used in a signal processing first course taught to second year ECE students. Simple nulling filters are used to minimize a sinusoidal jamming signal. The students have already learned about an FIR nulling filter, the placement of zeros on the unit circle, and the frequency response. In the filter design the students... View full abstract»

• ### Introducing signal processing through an advanced digital design course

Publication Year: 2011, Page(s):107 - 111
Cited by:  Papers (2)
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We describe our experience introducing DSP concepts via an FPGA-based advanced digital design course. The students had previously taken an introductory digital design course and a continuous-time linear systems course; a few were taking an introductory DSP course concurrently. Through a series of weekly lab exercises, the students learned advanced FPGA design methods while progressively constructi... View full abstract»

• ### Blind audio source separation using short+long term AR source models and spectrum matching

Publication Year: 2011, Page(s):112 - 115
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Blind audio source separation (BASS) arises in a number of applications in speech and music processing such as speech enhancement, speaker diarization, automated music transcription etc. Generally, BASS methods consider multichannel signal capture. The single microphone case is the most difficult underdetermined case, but it often arises in practice. In the approach considered here, the main sourc... View full abstract»