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# IEEE Signal Processing Letters

## Filter Results

Displaying Results 1 - 25 of 31
• ### [Front cover]

Publication Year: 2010, Page(s): C1
| PDF (178 KB)
• ### IEEE Signal Processing Letters publication information

Publication Year: 2010, Page(s): C2
| PDF (39 KB)

Publication Year: 2010, Page(s):415 - 416
| PDF (48 KB)
• ### New Method for Performance Evaluation of Grayscale Image Denoising Filters

Publication Year: 2010, Page(s):417 - 420
Cited by:  Papers (5)
| | PDF (694 KB) | HTML

Combining noise removal and detail preservation is a challenging issue in the design of image denoising filters. In this letter a new full-reference method for objective evaluation of such features in grayscale pictures is presented. The proposed approach is based on the classification of the filtering errors in two classes that respectively take into account the amount of noise still present afte... View full abstract»

• ### Iterative Phase Estimation for the Synthesis of Separated Sources From Single-Channel Mixtures

Publication Year: 2010, Page(s):421 - 424
Cited by:  Papers (20)
| | PDF (310 KB) | HTML

In this letter, we propose a novel method of refining the time-domain synthesis of individual source estimates from a single channel mixture. Employing a closed-loop architecture, the algorithm refines the synthesis of each source by iteratively estimating the phase of the sources, given the estimates of the source magnitude spectra and a single channel time-domain mixture. The performance of the ... View full abstract»

• ### On the Global Output SNR of the Parameterized Frequency-Domain Multichannel Noise Reduction Wiener Filter

Publication Year: 2010, Page(s):425 - 428
Cited by:  Papers (12)
| | PDF (126 KB) | HTML

The parameterized multichannel Wiener filter (PMWF) is known to allow for a flexible tuning of speech distortion and noise reduction. In addition, the output signal-to-noise ratio (SNR) is a natural metric that shows the true effect of such a filter on both residual noise and filtered speech. Earlier contributions have only shown that the output SNR of the Wiener filter is larger than the input SN... View full abstract»

• ### Narrowband Interference Mitigation in DS-UWB Systems

Publication Year: 2010, Page(s):429 - 432
Cited by:  Papers (16)
| | PDF (319 KB) | HTML

Interference suppression is important for ultra-wideband (UWB) systems to operate over spectrum occupied by pre-existing narrowband systems. In this letter, we first extend the code-aided interference suppression technique to a direct sequence (DS) UWB system which has been proposed for narrowband interference (NBI) suppression in direct sequence spread spectrum (DSSS) systems. Then, we introduce ... View full abstract»

• ### MMSE Based Greedy Antenna Selection Scheme for AF MIMO Relay Systems

Publication Year: 2010, Page(s):433 - 436
Cited by:  Papers (30)
| | PDF (271 KB) | HTML

We propose a greedy minimum mean squared error (MMSE)-based antenna selection algorithm for amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay systems. Assuming equal-power allocation across the multi-stream data, we derive a closed form expression for the mean squared error (MSE) resulted from adding each additional antenna pair. Based on this result, we iteratively select the a... View full abstract»

• ### EM Algorithm State Matrix Estimation for Navigation

Publication Year: 2010, Page(s):437 - 440
Cited by:  Papers (5)
| | PDF (204 KB) | HTML

The convergence of an expectation-maximization (EM) algorithm for state matrix estimation is investigated. It is shown for the expectation step that the design and observed error covariances are monotonically dependent on the residual error variances. For the maximization step, it is established that the residual error variances are monotonically dependent on the design and observed error covarian... View full abstract»

• ### Performance Analysis of Cooperative Networks With Relay Selection Over Nakagami-$m$ Fading Channels

Publication Year: 2010, Page(s):441 - 444
Cited by:  Papers (36)
| | PDF (208 KB) | HTML

The performance of dual-hop Decode-and-Forward relaying with relay selection (RS) is analyzed over Nakagami-m fading channels. Assuming that the direct source-to-destination link is active, closed-form expressions for the moment generating and the cumulative distribution functions of a RS-based cooperation scheme that utilizes maximal-ratio diversity at the destination are derived. These ex... View full abstract»

• ### Outage Probability of Opportunistic Relaying in Rayleigh Fading Channels With Multiple Interferers

Publication Year: 2010, Page(s):445 - 448
Cited by:  Papers (27)
| | PDF (167 KB) | HTML

In this letter, as multiple interferers have an effect on both the relays and the destination, the exact outage probabilities for the decode-and-forward (DF) opportunistic relaying are derived in three different cases: a) with selection combining (SC) deployed at the destination, b) with maximal ratio combining (MRC) deployed at the destination, and c) with hybrid selection and maximal ratio combi... View full abstract»

• ### Distributed Estimation of Gauss - Markov Random Fields With One-Bit Quantized Data

Publication Year: 2010, Page(s):449 - 452
Cited by:  Papers (19)
| | PDF (177 KB) | HTML

We consider the problem of distributed estimation of a Gauss-Markov random field using a wireless sensor network (WSN), where due to the stringent power and communication constraints, each sensor has to quantize its data before transmission. In this case, the convergence of conventional iterative matrix-splitting algorithms is hindered by the quantization errors. To address this issue, we propose ... View full abstract»

• ### Frequency-Domain Double-Talk Detection Based on the Gaussian Mixture Model

Publication Year: 2010, Page(s):453 - 456
Cited by:  Papers (13)  |  Patents (3)
| | PDF (384 KB) | HTML

In this letter, we propose a novel frequency-domain approach to double-talk detection (DTD) based on the Gaussian mixture model (GMM). In contrast to a previous approach based on a simple and heuristic decision rule utilizing time-domain cross-correlations, GMM is applied to a set of feature vectors extracted from the frequency-domain cross-correlation coefficients. Performance of the proposed app... View full abstract»

• ### Dithered GMD Transform Coding

Publication Year: 2010, Page(s):457 - 460
Cited by:  Papers (2)
| | PDF (212 KB) | HTML

The geometric mean decomposition (GMD) transform coder (TC) was recently introduced and was shown to achieve the optimal coding gain without bit loading under the high bit rate assumption. However, the performance of the GMD transform coder is degraded in the low rate case. There are mainly two reasons for this degradation. First, the high bit rate quantizer model becomes invalid. Second, the quan... View full abstract»

• ### Iterative Estimation of Sinusoidal Signal Parameters

Publication Year: 2010, Page(s):461 - 464
Cited by:  Papers (16)
| | PDF (234 KB) | HTML

While the problem of estimating the amplitudes of sinusoidal components in signals, given an estimation of their frequencies, is linear and tractable, it is biased due to the unavoidable, in practice, errors in the estimation of frequencies. These errors are of great concern for processing signals with many sinusoidal like components as is the case of speech and audio. In this letter, we suggest u... View full abstract»

• ### SNR and SIR Estimation for Multiuser UWB IR Systems With TH-BPSK

Publication Year: 2010, Page(s):465 - 468
Cited by:  Papers (4)
| | PDF (156 KB) | HTML

The signal-to-noise ratio (SNR) and signal-to-interference ratio (SIR) for multiuser time-hopping binary phase shift keying ultra-wide bandwidth impulse radio systems are jointly estimated using the moment-based method. Both additive white Gaussian noise channels and multipath fading channels are considered. Numerical results show that the new SNR and SIR estimators have normalized root-mean-squar... View full abstract»

• ### A Widely Linear Distortionless Filter for Single-Channel Noise Reduction

Publication Year: 2010, Page(s):469 - 472
Cited by:  Papers (12)  |  Patents (1)
| | PDF (234 KB) | HTML

Traditionally in the single-channel noise-reduction problem, speech distortion is inevitable since the desired signal is also filtered while filtering the noise. In fact, the more the noise is reduced, the more the speech distortion is added into the desired signal, as proved in the literature. So, if we require no speech distortion, we either end up with no noise reduction at all or have to use m... View full abstract»

• ### Extending the Classical Multidimensional Scaling Algorithm Given Partial Pairwise Distance Measurements

Publication Year: 2010, Page(s):473 - 476
Cited by:  Papers (10)
| | PDF (259 KB) | HTML

We consider the problem of node localization given partial pairwise distance measurements. Current solutions first complete the missing distances and then apply the classical multidimensional scaling (MDS) algorithm. Instead, we extend the classical MDS to a setup where the sensor network is composed of a fully connected group of nodes that communicate with each other (e.g., beacons), and a group ... View full abstract»

• ### CRLB Based Optimal Noise Enhanced Parameter Estimation Using Quantized Observations

Publication Year: 2010, Page(s):477 - 480
Cited by:  Papers (14)
| | PDF (223 KB) | HTML

In this letter, optimal additive noise is characterized for parameter estimation based on quantized observations. First, optimal probability distribution of noise that should be added to observations is formulated in terms of a Cramer-Rao lower bound (CRLB) minimization problem. Then, it is proven that optimal additive ??noise?? can be represented by a constant signal level, which means that rando... View full abstract»

• ### Convergence Rate of LSMI in Amplitude Heterogeneous Clutter Environment

Publication Year: 2010, Page(s):481 - 484
Cited by:  Papers (5)
| | PDF (164 KB) | HTML

In this letter, we analyze the convergence rate of loaded sample matrix inversion (LSMI) algorithm in amplitude heterogeneous clutter environment. The probability density function of output signal to interference and noise ratio loss (SINR Loss) is derived. Then we give an approximate expression of average SINR loss. Compared with the case where samples used for estimation of covariance matrix of ... View full abstract»

• ### Robust Impulse Noise Variance Estimation Based on Image Histogram

Publication Year: 2010, Page(s):485 - 488
Cited by:  Papers (15)
| | PDF (1008 KB) | HTML

The state of the art impulse noise removal methods make use of the noise variance, or equivalently the noise mixing probability p, and are iterative procedures (e.g., , ). However, so far there has been a lack of effective estimator for p. As a result, true values of p are often used during simulation, which may not be practical. Furthermore, the optimal stopping criteria for ... View full abstract»

• ### Improving Perceptual Quality of Speech in a Noisy Environment by Enhancing Temporal Envelope and Pitch

Publication Year: 2010, Page(s):489 - 492
Cited by:  Papers (1)
| | PDF (177 KB) | HTML

This letter proposes a new method of improving perceptual quality of speech in a noisy environment. Based on the perception theory that the temporal envelope plays a major role in assessing intelligibility, the proposed method uses a novel operation that enhances the fluctuation of the band-wise temporal envelope. It also contains pitch enhancement in frequency domain to further improve the percep... View full abstract»

• ### Robust Measurement Validation in Target Tracking Using Geometric Structure

Publication Year: 2010, Page(s):493 - 496
Cited by:  Papers (1)
| | PDF (395 KB) | HTML

Selection schemes for forming data validation regions for target tracking are discussed in this paper. We develop a novel algorithm, less sensitive to gate size than conventional approaches. This new gate selection method combines a conventional threshold based algorithm with a geometric metric measure based on the Voronoi diagram. An adaptive search based on the Voronoi measure is then use... View full abstract»

• ### Unitary Linear Dispersion Code Design and Optimization for MIMO Communication Systems

Publication Year: 2010, Page(s):497 - 500
Cited by:  Papers (19)
| | PDF (467 KB) | HTML

Linear Dispersion Codes (LDCs) have recently attracted numerous research interests. Thanks to their efficient spreading of data across both the time and spatial domains, LDCs are capable of achieving a desired Diversity-Multiplexing Trade-off (DMT) in Multiple Input Multiple Output (MIMO) broadband wireless access systems. This paper proposes a novel LDC design method, which relies on the unitary ... View full abstract»

• ### A Minimum Value Based Threshold Setting Strategy for Frequency Domain Interference Excision

Publication Year: 2010, Page(s):501 - 504
Cited by:  Papers (5)
| | PDF (267 KB) | HTML

We present a robust threshold setting strategy with modest computational complexity for frequency domain interference excision in direct sequence spread-spectrum (DSSS) communication systems. The proposed strategy calculates the threshold by multiplying the minimum value of the averaged squared magnitude with a predefined scaling factor. An analytical framework for choosing the scaling factor is d... View full abstract»

## Aims & Scope

The IEEE Signal Processing Letters is a monthly, archival publication designed to provide rapid dissemination of original, cutting-edge ideas and timely, significant contributions in signal, image, speech, language and audio processing.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
James E. Fowler
Dept Electrical & Computer Engineering
Associate Director
Distributed Analytics and Security Institute
Mississippi State University
Mississippi State, MS 39762 USA
fowler@ece.msstate.edu