Scheduled System Maintenance
On Saturday, October 21, single article sales and account management will be unavailable until 6 PM ET.

# IEEE Transactions on Communications

## Filter Results

Displaying Results 1 - 25 of 35

Publication Year: 2006, Page(s):C1 - C4
| PDF (51 KB)
• ### IEEE Transactions on Communications publication information

Publication Year: 2006, Page(s): C2
| PDF (42 KB)
• ### Maximizing Burst Erasure-Correction Capability of MDS Codes

Publication Year: 2006, Page(s):1901 - 1904
Cited by:  Papers (3)
| | PDF (102 KB) | HTML

In general, an (n,k) maximum distance separable (MDS) code over GF(pm) can not correct all burst erasures of length (n-k)m over GF(p). In this letter, we constructively show that such a linear MDS code over GF(pm) can be modified to correct all burst erasures of length up to (n-k)m over GF(p), while maintaining its MDS property over GF(pm) View full abstract»

• ### The Infeasible SIR Region Is Not a Convex Set

Publication Year: 2006, Page(s):1905 - 1907
Cited by:  Papers (12)
| | PDF (126 KB) | HTML

The infeasible signal-to-interference ratio (SIR) region is a set of SIRs that are not supportable in a power-controlled wireless network. It was conjectured that this set is convex in networks constrained on total power. We disprove the conjecture and discuss how this result may impact optimal medium-access control policies View full abstract»

• ### Punctured Trellis-Coded Quantization and Modulation

Publication Year: 2006, Page(s):1908 - 1912
| | PDF (251 KB) | HTML

We propose a punctured trellis-coded quantization (PTCQ) scheme as the dual of a known punctured trellis-coded modulation (PTCM) scheme, and then generalize a combined trellis-coded quantization/modulation (TCQ/TCM) scheme to a combined PTCQ/PTCM scheme, with rates optimally allocated between source coding and channel coding to match the given channel signal-to-noise ratio (SNR). Simulation result... View full abstract»

• ### A Family of Generalized Constant Modulus Algorithms for Blind Equalization

Publication Year: 2006, Page(s):1913 - 1917
Cited by:  Papers (54)
| | PDF (239 KB) | HTML

By generalizing the definition of complex modulus, this letter presents a family of generalized constant modulus algorithms whose special examples includes not only the well-known constant modulus algorithm, but also the recently proposed sign Godard algorithm, square contour algorithm (SCA), generalized SCA, and sign SCA View full abstract»

• ### Convolutional Spreading CDMA and Comparison With the DS-CDMA With RAKE Receiver

Publication Year: 2006, Page(s):1918 - 1922
Cited by:  Papers (12)
| | PDF (191 KB) | HTML

For synchronous downlink direct-sequence code-division multiple access (DS-CDMA), we introduce a cyclic-prefix (CP)-based convolutional spreading CDMA (CS-CDMA/CP) scheme employing zero correlation zone (ZCZ) codes, which gives a class of multiuser interference (MUI)-free CDMA schemes, including Suehiro's CDMA and block spreading (BS) CDMA as special cases. We show that CS-CDMA/CP employing approp... View full abstract»

• ### Extended Gardner Detector for Improved Symbol-Timing Recovery of $M$-PSK Signals

Publication Year: 2006, Page(s):1923 - 1927
Cited by:  Papers (8)  |  Patents (1)
| | PDF (284 KB) | HTML

In a recent paper, the modified Gardner detector has been proposed for advanced symbol-timing recovery of M-ary phase-shift keying signals. Compared with the original algorithm, the self-noise jitter can be considerably reduced for highly bandlimited systems and smaller values of M. In this letter, a completely different approach is investigated, which improves the self-noise performance for large... View full abstract»

• ### Detection of Aperiodically Embedded Synchronization Patterns on Rayleigh Fading Channels

Publication Year: 2006, Page(s):1928 - 1932
Cited by:  Papers (4)
| | PDF (178 KB) | HTML

Correct reception of synchronization patterns aperiodically embedded in random data is vital for robust data transmission. In this letter, we derive general metrics and high-signal-to-noise ratio approximations to the metrics for random-length frames transmitted over Rayleigh fading channels. Simulation results are presented for commonly used modulation schemes with coherent and noncoherent demodu... View full abstract»

• ### Performance of Impulse-Train-Modulated Ultra-Wideband Systems

Publication Year: 2006, Page(s):1933 - 1936
Cited by:  Papers (8)
| | PDF (143 KB) | HTML

The performance of impulse-train-modulated ultra-wideband (UWB) systems for the ideal additive white Gaussian noise channel is analyzed in this letter. The derived formulae are also used to optimize the modulation parameter of a Gaussian monocycle UWB impulse radio View full abstract»

• ### An Ensemble of Iteratively Decodable Codes Constructed Based on a Superposition Method

Publication Year: 2006, Page(s):1937 - 1947
| | PDF (938 KB) | HTML

In this paper, the construction of new families of error-correcting codes adapted from Boutros and Lentmaier's generalized low-density (GLD) codes, which we called generalized irregular low-density (GILD) codes, is investigated. By introducing irregular base matrices, significant improvements on Boutros and Lentmaier's results are achieved. Two cases are considered; in the first case, the same con... View full abstract»

• ### Constellation Design for Trellis-Coded Unitary Space–Time Modulation Systems

Publication Year: 2006, Page(s):1948 - 1959
Cited by:  Papers (4)
| | PDF (562 KB) | HTML

We consider the problem of creating signal constellations for trellis-coded unitary space-time communication links, where neither the transmitter nor the receiver knows the fading gains of the channel. Our study includes constellation-design techniques for trellis-coded schemes with and without parallel paths, which allows us to find a tradeoff between low complexity and high performance. We prese... View full abstract»

• ### Space–Time Coding for Multiuser Ultra-Wideband Communications

Publication Year: 2006, Page(s):1960 - 1972
Cited by:  Papers (16)  |  Patents (1)
| | PDF (821 KB) | HTML

In this paper, we present the construction of full rate, fully diverse, and totally real space-time (ST) codes for ultra-wideband (UWB) transmissions. In particular, we construct two families of codes adapted to real carrierless UWB communications that employ pulse position modulation, pulse amplitude modulation, or a combination of the two. The first family encodes adjacent symbols and is constru... View full abstract»

• ### Design, Simulation, and Testing of a CMOS Analog Decoder for the Block Length-40 UMTS Turbo Code

Publication Year: 2006, Page(s):1973 - 1982
Cited by:  Papers (2)
| | PDF (990 KB) | HTML

In this paper, we present an all-analog implementation of the rate-1/3, block length 40, universal mobile telecommunications system (UMTS) turbo decoder. The prototype was designed and fabricated in 0.35 μm complementary metal-oxide-semiconductor technology and operates at 3.3 V. We also introduce a discrete-time first-order model for analog decoders which allows fast bit-error rate simulat... View full abstract»

• ### Channel Capacity Between Antenna Arrays— Part II: Amplifier Noise Dominates

Publication Year: 2006, Page(s):1983 - 1992
Cited by:  Papers (22)
| | PDF (1781 KB) | HTML

In this paper (Part II of two), we continue examining the use of space-time coding techniques to achieve very-high spectral efficiencies in highly scattering environments, using multiple transmit and receive antennas. The goal is to increase as much as possible the number of antenna elements, which is particularly difficult at the remote station, which usually has a more limited space allotted to ... View full abstract»

• ### Adaptive OFDM Techniques With One-Bit-Per-Subcarrier Channel-State Feedback

Publication Year: 2006, Page(s):1993 - 2003
Cited by:  Papers (31)  |  Patents (1)
| | PDF (626 KB) | HTML

In the orthogonal frequency-division multiplexing (OFDM) scheme, some subcarriers may be subject to a deep fading. Adaptive techniques can be applied to mitigate this effect if the channel-state information (CSI) is available at the transmitter. In this paper, we study the performance of an OFDM-based communication system whose transmitter has only one bit of CSI per subcarrier, obtained through a... View full abstract»

• ### Timing Recovery With Frequency Offset and Random Walk: Cramér–Rao Bound and a Phase- Locked Loop Postprocessor

Publication Year: 2006, Page(s):2004 - 2013
Cited by:  Papers (2)
| | PDF (548 KB) | HTML

We consider the problem of timing recovery for bandlimited, baud-rate sampled systems with intersymbol interference and a timing offset that can be modeled as a combination of a frequency offset and a random walk. We first derive the Crameacuter-Rao bound (CRB), which is a lower bound on the estimation error variance for any timing estimator. Conventional timing recovery is based on a phase-locked... View full abstract»

• ### Analysis of a Delay-Constrained Hybrid ARQ Wireless System

Publication Year: 2006, Page(s):2014 - 2022
Cited by:  Papers (2)
| | PDF (418 KB) | HTML

A real-time wireless system using hybrid automatic repeat request to correct errors is analyzed. Packet errors are modeled by a two-state Markov chain, and batch packet arrivals are allowed. Packets are dropped at the sender if their delays exceed a time limit, possibly after a number of retransmissions. Using the delay-model approach, a closed-form expression of packet-loss probability (PLP) and ... View full abstract»

• ### Crossband Flexible UWB Multiple Access for High-Rate Multipiconet WPANs

Publication Year: 2006, Page(s):2023 - 2032
Cited by:  Papers (3)
| | PDF (640 KB) | HTML

Emerging indoor technologies including wireless multimedia and personal area networks (WPANs) entail high-rate systems capable of supporting multiple users (piconets) with variable rates. These requirements motivate the design of multiband (MB) ultra-wideband (UWB) radios for their simplicity in handling pronounced frequency selectivity, agility in coping with interference, scalability in providin... View full abstract»

• ### Sensor Networks With Mobile Access: Energy and Capacity Considerations

Publication Year: 2006, Page(s):2033 - 2044
Cited by:  Papers (30)
| | PDF (801 KB) | HTML

Sensor network with mobile access (SENMA) is an architecture in which randomly deployed low-power sensors are orchestrated by a few powerful mobile access points (APs). This paper considers SENMA from energy-efficiency and information-theoretic perspectives. By allowing sensors to propagate data directly to mobile APs over multiaccess channels, and relieving sensors from energy-consuming network f... View full abstract»

• ### Electrical Dispersion Compensation Equalizers in Optical Direct- and Coherent-Detection Systems

Publication Year: 2006, Page(s):2045 - 2050
Cited by:  Papers (8)
| | PDF (762 KB) | HTML

We study the performances of several electrical dispersion compensation (EDC) equalizers in the presence of chromatic dispersion (CD) and polarization mode dispersion (PMD) for optical coherent and direct detection on-off keying systems. The EDCs that are analyzed include the decision-feedback equalizer, linear equalizer, and maximum-likelihood sequence estimator (MLSE). We present an inclusive qu... View full abstract»

• ### QoS Support by Using CDF-Based Wireless Packet Scheduling in Fading Channels

Publication Year: 2006, Page(s):2051 - 2061
Cited by:  Papers (20)
| | PDF (636 KB) | HTML

In this paper, we provide an efficient quality-of-service (QoS)-guarantee scheme using the cumulative-distribution-function-based scheduling (CS) algorithm in wireless fading channels. We first extend the CS algorithm such that it can encompass the practical environment with discrete user transmission rates. The extended CS algorithm can allocate the time fractions to users in arbitrary manner, an... View full abstract»

• ### Channel Estimation for MIMO-OFDM Systems by Modal Analysis/Filtering

Publication Year: 2006, Page(s):2062 - 2074
Cited by:  Papers (18)
| | PDF (686 KB) | HTML

In this paper, we investigate the benefits of exploiting the a priori information about the structure of the multipath channel on the performance of channel estimation for multiple-input multiple-output-orthogonal frequency-division multiplexing (MIMO-OFDM) systems. We first approach this problem from the point of view of estimation theory by computing a lower bound on the estimation error and stu... View full abstract»

• ### BER Performance of Bandlimited DS-CDMA Systems in Nakagami Fading

Publication Year: 2006, Page(s):2075 - 2084
Cited by:  Papers (9)
| | PDF (492 KB) | HTML

Accurate average bit-error rate analysis of asynchronous bandlimited binary direct-sequence code-division multiple-access (DS-CDMA) systems in Nakagami-m fading is studied. The fading is assumed to be flat and slow. The spectrum raised-cosine (SRC) and Beaulieu-Tan-Damen (BTD) pulse-shapes are employed. A new method which combines the characteristic function (CF) method with the improved Gaussian ... View full abstract»

• ### The $p$ -Sphere Encoder: Peak-Power Reduction by Lattice Precoding for the MIMO Gaussian Broadcast Channel

Publication Year: 2006, Page(s):2085 - 2091
Cited by:  Papers (7)
| | PDF (738 KB) | HTML

A vector precoding scheme has been recently proposed for the multiple-input multiple-output (MIMO) Gaussian broadcast channel. This technique minimizes the instantaneous transmitted power of linearly precoded signals, but does not take into account the peak-to-average-power ratio (PAPR). In this paper, we present a modified vector precoding scheme, where a perturbation vector is chosen in order to... View full abstract»

## Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas