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Achievable rate of MIMO channels with data-aided channel estimation and perfect interleaving

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 2001年第12期19卷 2358-2368页

作者： Baltersee, J Fock, G Meyr, H Rhein Westfal TH Aachen Rhein Westfal TH Aachen Integrated Syst Signal Proc Lab Aachen Germany

The achievable rate of a coherent coded modulation digital communication system with data-aided channel estimation and a discrete equiprobable symbol alphabet is derived under the assumption that the system operates on a flat fading multiple-input/multiple-output channel and uses a perfect interleaver to combat the bursty nature of the channel. It is shown that linear minimum mean square error channel estimation directly follows from the derivation and links average mutual information to the channel dynamics. Based on the assumption that known training symbols are transmitted, the achievable rate of the system is optimized with respect to the amount of training information needed.

关键词： channel capacity fading channels interleaved coding mutual information synchronized detection

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Adaptive Bit-interleaved Coded Modulation Based on the Expurgated Bound for Mobile Radio OFDM Systems Aided by Fading Prediction

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IEEE TRANSACTIONS ON COMMUNICATIONS 2012年第8期60卷 2059-2064页

作者： Jia, Tao Duel-Hallen, Alexandra MathWorks Inc Natick MA 01760 USA N Carolina State Univ Dept Elect & Comp Engn Raleigh NC 27695 USA

Adaptive bit-interleaved coded modulation (ABICM) is attractive for rapidly varying mobile radio channels due to its robustness to imperfect channel state information (CSI). A novel ABICM method that exploits the expurgated bound to maintain the target bit error rate (BER) for diverse CSI conditions is proposed and evaluated for an adaptive mobile radio orthogonal frequency division-multiplex (OFDM) system aided by the long-range fading prediction. It is demonstrated that ABICM is much less sensitive to prediction errors than adaptive modulation techniques that do not employ interleaving. However, reliable fading prediction is still necessary for ABICM to achieve high spectral efficiency for practical channel conditions.

关键词： Adaptive modulation fading channels interleaved coding frequency division multiplexing resource management

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Air interfaces for satellite based digital TV broadcasting in-the railway environment

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IEEE TRANSACTIONS ON BROADCASTING 2006年第2期52卷 158-166页

作者： Scalise, Sandro Mura, Rodolfo Mignone, Vittoria DLR Inst Commun & Navigat D-82230 Wessling Germany Alcatel Alenia Space Italy I-00131 Rome Italy RAI CRIT I-10135 Turin Italy

This paper deals with the analysis of possible air interfaces to be employed in order to provide digital TV services to high speed trains via satellite. This turns out to be an extremely challenging issue, since in addition to traditional impairments characterizing the land mobile satellite channel, one has to face the presence of frequent tunnels, whose duration can easily reach several kilometers, and the presence of a variety of peculiar obstacles, such as electrical trellises and posts with and without brackets, which may result in frequent and deep fades. A large variety of possible solutions, based on standardized air interfaces with proper modifications, are analyzed by means of extensive software simulations, showing that effective solutions can be devised. Some consideration concerning the deployment of terrestrial gap-fillers to bridge the satellite connectivity inside long railway tunnels, large train station and within dense urban areas are also briefly addressed.

关键词： Channel coding digital TV diversity methods fading channels interleaved coding rail transportation communication satellite broadcasting satellite mobile communication time-varying channels TV broadcasting

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Reduced-delay protection of DSL systems against nonstationary disturbances

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IEEE TRANSACTIONS ON COMMUNICATIONS 2004年第11期52卷 1927-1938页

作者： Toumpakaris, D Cioffi, JM Gardan, D Marvell Semicond Inc Sunnyvale CA 94089 USA Stanford Univ Dept Elect Engn Stanford CA 94305 USA Frence Telecom R&D F-22307 Lannion France

In addition to being designed to successfully cope with stationary noise, crosstalk, and intersymbol interference, digital subscriber loop (DSL) systems need to be shielded from nonstationary disturbances, such as impulse noise and RF interference. Currently, deployed DSL systems achieve protection against nonstationary interference using a combination of Reed-Solomon (RS) codes and interleaving. However, interleaving results in delay. Long delays are undesirable in high-rate systems that support interactive applications. In this study, it is shown that the interleaving delay of DSL systems can be significantly reduced by performing erasure decoding of the RS codewords at the receiver. Three different techniques for determining the erasures are proposed. Use of the techniques results in a reduction of the interleaving delay that is required to mitigate worst-case impulse noise by up to a factor of 2, which is verified by simulation. Moreover, the techniques do not require any changes at the transmitter and therefore guarantee compatibility with currently deployed systems.

关键词： electromagnetic interference impulse noise interleaved coding subscriber loops

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A hybrid interleaving scheme that enables packet switching on multiple-access radio communication channels

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IEEE TRANSACTIONS ON COMMUNICATIONS 1999年第12期47卷 1777-1780页

作者： Olsen, DP Aerospace Corp Los Angeles CA 90009 USA

An interleaving technique is proposed that is memory, delay, and packet efficient for demand assignment multiple-access, packet-switched transmission with frequency-hopped survivably interleaved signals over jammed or scintillated radio channels. This hybrid interleaving scheme concatenates the convolutional interleaver and the block interleaver.

关键词： circuit switching error correction coding interleaved coding interleaved memories packet radio packet switching

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Modeling the Energy Consumption of Reed-Solomon Decoding with Interleaving on Fading Channels

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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2008年第11期7卷 4100-4104页

作者： Kang, Kyungtae Shin, Heonshik Univ Illinois Coordinated Sci Lab Urbana IL 61801 USA Seoul Natl Univ Dept Elect Engn & Comp Sci Seoul 151 South Korea

In CDMA2000 1xEV-DO Broadcast and Multicast Services (BCMCS), Reed-Solomon (RS) coding is applied to the layers above the turbo code, which is effective in correcting long bursts of errors when an additional block interleaving mechanism is used to increase the time diversity. This is controlled by changing the width of the error control block (ECB), which converts error bursts into random patterns. We propose and evaluate an energy model of the RS decoding process under varying conditions of Rayleigh fading on the broadcast channel, with different levels of block interleaving within those permitted by the BCMCS specification. Simulation results show that our model accurately predicts the energy consumption of the RS decoding process, and is thus able to contribute to the development of energy-efficient broadcast services.

关键词： Energy consumption fading channels interleaved coding Reed-Solomon codes

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On the Ramsey class of interleavers for robust speech recognition in burst-like packet loss

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IEEE TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING 2007年第4期15卷 1496-1499页

作者： Gomez, Angel M. Peinado, Antonio M. Sanchez, Victoria Rubio, Antonio J. Univ Granada Dept Teoria Senal Telemat & Comunicac E-18071 Granada Spain

This paper focuses on the application of the Ramsey class of interleavers to the problem of achieving robust distributed speech recognition in the presence of burst-like packet loss. Although block interleavers of minimal latency have been already proposed by other authors in order to cope with this problem, the Ramsey class offers a more powerful kind of interleavers. Taking into account the behavior of the error concealment techniques commonly used in these recognition systems, it is possible to design Ramsey interleavers which, in comparison with the block interleavers of minimal latency, can counteract longer bursts with the same latency and thus improve the robustness of the recognition system. The effectiveness of the proposed design criterion is verified by means of simulations and experimental comparisons.

关键词： distributed speech recognition error concealment interleaved coding packet loss packet switching

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Uniform Latin square interleaving for correcting two-dimensional burst errors

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IEEE TRANSACTIONS ON MAGNETICS 2005年第10期41卷 2962-2964页

作者： Kondou, K Noda, M Sony Corp Core Technol Dev Grp Tokyo 1410001 Japan

A new class of Latin square, a uniform Latin square, as an interleaving algorithm has been introduced to correct two-dimensional (2-D) burst errors in data-storage systems. The uniform Latin square with order n = l (.) m guarantees that there are no duplicated numbers in any (l - 1) x m or l x (m - 1) areas in an n x n square. Uniform Latin square interleaving has twice the error-correcting ability of the interleaving of a conventional Latin square for large 2-D burst errors.

关键词： burst error error correction interleaved coding Latin square

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On the code and interleaver design of broadband OFDM systems

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IEEE COMMUNICATIONS LETTERS 2004年第11期8卷 653-655页

作者： Wang, XF Shayan, YR Zeng, M Concordia Univ Dept Elect & Comp Engn Montreal PQ H3G 1M8 Canada FreeScale Semicond Austin TX 78729 USA

In this letter, we study the performance of space-frequency-coded orthogonal frequency-division modulation systems over multiple-input multiple-output frequency-selective channels. The diversity and coding advantages are derived in terms of the minimum Hamming distance and the minimum squared product distance of the code as well as the relative frequency locations (tones) where a pair of codewords with the minimum Hamming distance differ. These relationships between performance and well-defined code parameters provide new insight to code construction and interleaving design. In addition, we propose a block interleaver that yields nearly optimal coding advantage for space-frequency trellis codes.

关键词： diversity methods interleaved coding MIMO OFDM space-frequency codes

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Approximate Performance Analysis of Coded OSTBC-OFDM Systems over Arbitrary Correlated Generalized Ricean Fading Channels

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IEEE TRANSACTIONS ON COMMUNICATIONS 2009年第8期57卷 2235-2238页

作者： Loskot, Pavel Beaulieu, Norman C. Swansea Univ Inst Adv Telecommun Swansea SA2 8PP W Glam Wales Univ Alberta Dept Elect & Comp Engn Edmonton AB T6G 2V4 Canada

A framework for analyzing the performance of coded OSTBC-OFDM systems over arbitrary correlated generalized Ricean fading channels is established. The moment generating function of the signal-to-noise ratio at the input to the channel decoder is derived assuming correlated transmitter and receiver antennas and correlated paths in frequency selective channels. The probability of outage, the pairwise error probability, and the bit error rate are then evaluated. Bit-interleaved and iteratively decoded turbo product codes, Gray encoded M-ary quadrature amplitude modulation, and other parameters of the IEEE 802.16 Standard are used to illustrate numerical results.

关键词： Diversity methods fading channels interleaved coding MIMO systems OFDM

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