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Novel interleaved code for High-Throughput Parallel DNA-Based Molecular Communications

IEEE COMMUNICATIONS LETTERS 2023年第10期27卷 2593-2597页

作者： Wang, Qingwen Sun, Yue Cheng, Wanli Chen, Yifan Yang, Kun Chengdu Univ Technol Sch Mech & Elect Engn Chengdu 610059 Peoples R China Univ Elect Sci & Technol China Sch Life Sci & Technol Chengdu 610000 Peoples R China Univ Essex Sch Comp Sci & Elect Engn Colchester CO4 3SQ England Univ Elect Sci & Technol China Sch Informat & Commun Engn Chengdu 611731 Peoples R China

DNA-based molecular communication (DNA-MC) is a biological communication mechanism that uses DNA strands as information carriers. The longevity, stability, high information density, massive parallelism, and biological compatibility of DNA offer a dramatic potential for DNA-based storage, computing, and communication. This letter extends our previous work, which used the directional and controllable molecular hopper along the track to replace the slow and random diffusion mechanisms. This letter proposes a multiple-track-hopper parallel communication mechanism to achieve high throughput by parallel transmission and sequencing. We recommend utilizing interleaved coding to mitigate the bit error rate (BER) caused by the back-stepping motion, resulting in successive symmetric errors. Additionally, we have explored the proper interleaving depth necessary to preserve the diminished DNA information density that results from the redundancy for error correction. Simulations show that interleaved coding efficiently reduces BER in parallel DNA-MC while requiring less redundancy. This letter demonstrates the feasibility and potential of high-throughput and low-error DNA-MC, which could enable novel interdisciplinary advances between DNA communication, nanotechnology, and synthetic biology.

关键词： DNA-based molecular communication high-throughput parallel communication interleaved code deduplication algorithm molecular hopper

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Asymptotically Good codes Obtained by an Extended Primitive BCH code Concatenated with interleaved codes 8

Asymptotically Good Codes Obtained by an Extended Primitive ...

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IEEE 8th Joint International Information Technology and Artificial Intelligence Conference (ITAIC)

作者： Cheng, Feng Southwest Jiaotong Univ Sch Math Chengdu 610031 Sichuan Peoples R China

How to construct asymptotically good codes is one of the hottest topic in modern coding theory. In this paper, we concatenated an extended primitive BCH outer code with a class of binary inner codes constructed by an ... 详细信息

ISBN: (纸本)9781538681787

关键词： Asymptotically good codes Asymptotically good code classes BCH code interleaved code Gilbert-Varshamov bound Weight spectra

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code-Division Space-Time Fountain code for Plasma Sheath Communication

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IEEE ACCESS 2024年 12卷 3611-3616页

作者： Zhang, Haojie Zhai, Ding Air Force Engn Univ Sch Informat & Nav Xian 710077 Peoples R China

Influenced by the special physical characteristics of the plasma sheath and the parameters of the aircraft's attitude, the channel containing the plasma sheath can be regarded as a special kind of discontinuous channel. A code-division space-time fountain code form is proposed that is suitable for the spatial characteristics of the plasma sheath channel. Simulation results show that the use of code-division space-time fountain code maximizes the use of the airspace resources in the plasma sheath channel. The scheme proposed in this paper can be used to alleviate the "ionization blackout" problem faced by hypersonic vehicles in the reentry process.

关键词： Plasma sheath spatial-domain resource communication window fountain code interleaved code

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Soft-Decoding Algorithm for Fountain code in Plasma Sheath

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IEEE TRANSACTIONS ON PLASMA SCIENCE 2024年第9期52卷 4748-4752页

作者： Zhang, Haojie Zhai, Ding Cao, Yifeng Air Force Engn Univ Sch Informat & Nav Xian 710038 Peoples R China

Plasma sheath can interfere with normal communication between aircraft and ground control station, and the large transmission delay and high information error rate it introduces make traditional feedback retransmission transmission systems ineffective. The use of forward error correction codes such as fountain codes can effectively solve the problem of unidirectional transmission. However, the harsh transmission environment of the plasma sheath channel can cause errors in some information bits of the fountain code encoding packets. Traditional hard decision decoding methods will discard these encoding packets, which greatly wastes valuable channel resources. This article proposes a fountain code soft decoding method suitable for plasma sheath channels, aiming to fully use the available information in the encoding packets. The simulation results show that this method can improve the transmission efficiency of the entire plasma sheath channel.

关键词： Communication window fountain code interleaved code plasma sheath spatial-domain resource

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An 830-MHz CMOS Switch-Mode Power Amplifier Under Time-Multiplexing Outphasing Operation

An 830-MHz CMOS Switch-Mode Power Amplifier Under Time-Multi...

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Wireless and Microwave Technology Conference (WAMICON)

作者： Nakatani, Toshifumi Wambach, Travis Falcon, Edward N. Fathy, Aly E. MaXentr Technol LLC La Jolla CA 92037 USA Vulcan Wireless Inc Carlsbad CA 92008 USA Univ Tennessee Dept EE & CS Knoxville TN USA

ISBN: (纸本)9798350344943

An 830-MHz CMOS switch-mode power amplifier (SMPA) has been demonstrated under our proposed time-multiplexing Outphasing (TMO) operation. The TMO encoding waveform has constant envelope, which is suitable for an SMPA. The noise level close to the carrier is quite low compared with conventional envelope delta-sigma modulation and envelope pulse-width-modulation spectra although spurious products are emerged at the one-fifth of the carrier frequency away. For demonstration, a differential voltage-mode class-D power amplifier was fabricated using 45-nm SOI CMOS technology with an off-chip reconstruction filter. In the single-tone test, the peak output power of 15.4 dBm and peak overall efficiency of 54.4% are achieved. An 802.11ah like signal with the peak-to-average ratio of 8 dB is delivered, where the in-band noise floor of the TMO spectrum is approximately 20 dB lower compared with envelope delta-sigma / pulse-width modulated spectra.

关键词： power amplifiers switching circuits interleaved code phase modulation CMOS integrated circuit signal reconstruction radio frequency radio communication

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Fractional decoding of r-Hermitian codes

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FINITE FIELDS AND THEIR APPLICATIONS 2023年第1期92卷

作者： Matthews, Gretchen L. Murphy, Aidan W. Santos, Welington Virginia Tech Dept Math Blacksburg VA 24061 USA Johns Hopkins Appl Phys Lab Laurel MD USA

In this paper, we present a fractional decoding algorithm for a new family of codes which are constructed from the Hermitian curve, called r-Hermitian codes. These codes of length n are defined over an extension field F-q2i of F-q2 and the fractional decoding algorithms that we present are algorithms for error correction that use only aln symbols of a subfield of size q(2) as input into the decoding algorithm, where alpha < 1, meaning a fraction of the subsymbols that are typically utilized. We demonstrate that collaborative decoding of interleaved codes supports fractional decoding of the r-Hermitian codes, allowing for improved bounds on the fractional decoding radius. (c) 2023 Elsevier Inc. All rights reserved.

关键词： Distributed storage system Fractional decoding Hermitian curve Collaborative decoding interleaved code Reed-Solomon code

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Short-Frame Fountain code for Plasma Sheath With "Communication Windows"

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2020年第12期69卷 15569-15579页

作者： Zhang, Haojie Yang, Min Bao, Weimin Li, Xiaoping Wang, Junjie Xidian Univ Sch Aerosp Sci & Technol Xian 710071 Peoples R China Sch Air Force Engn Univ Xian 710077 Peoples R China

The surface of a hypersonic vehicle traveling at a speed exceeding Mach 10 is covered by a plasma sheath. The plasma sheath is a complex dynamic random medium that seriously attenuates electromagnetic (EM) waves and generates the so-called blackout phenomenon. However, owing to changes in vehicle flight parameters, such as the angle of attack, speed, and altitude, or the effects of plasma weakening control measures, the attenuation effect of the plasma sheath on EM waves weakens for a short time. At times, the amplitude of the EM waves is higher than the communication threshold, and the EM waves penetrate the plasma sheath in a so-called "communication window". However, the random temporal variance of the plasma sheath parameters causes the required parameters of the "communication windows" to appear randomly, resulting in the traditional communication methods that needs to keep the communication link open for a long time being no longer applicable. To maximize the use of these "communication windows", this paper proposes a short-frame fountain code (SFFC), constructs a time-varying plasma sheath channel model, and studies the relationship between the SFFC parameters and the transmission performance of this particular channel. Simulation and experimental results show that the use of SFFC improves the reliability of communication through the plasma sheath. The uninterrupted and correct transmission of information can be achieved even when the plasma equivalent frequency is close to the carrier frequency.

关键词： Plasma sheaths Encoding Plasmas Attenuation Electromagnetics Receivers Decoding Plasma sheath SFFC time-varying plasma sheath channel fountain code interleaved code

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Research of interleaved code Applied in XCP Signal Processing

Research of Interleaved Code Applied in XCP Signal Processin...

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International Conference on Materials Science and Information Technology (MSIT 2011)

作者： Jia, Zhicheng Song, Xiaohua Li, Yongjun Zhang, Yan Liu, Ning Hebei Univ Technol Sch Informat Engn Tianjin 300401 Peoples R China Natl Ocean Technol Cent Tianjin 300111 Peoples R China

ISBN: (纸本)9783037853191

The XCP(eXpendable Current Profiler, XCP) is a one-time use of the current profiler observation instruments which is cheap, fast access to the parameters of the water velocity profile. The signal processing is an important part of the research of XCP. The paper discusses the coding study in the signal processing technology, analysises the interference and noise of the transmission line, uses the interleaved code method for reducing errors to improve the reliability of the communication, and simulates the interleaving encoding and decoding system by the Systemview tool, demonstrates the reliability and feasibility of data transmission by using interleaved coded.

关键词： XCP interleaved code SystemView

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Coding techniques for link adaptation in multicarrier systems

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IET COMMUNICATIONS 2008年第7期2卷 895-902页

作者： Nagaraj, S. Bell, M. San Diego State Univ Dept Elect & Comp Engn San Diego CA 92182 USA Purdue Univ Dept Elect & Comp Engn W Lafayette IN 47907 USA

A novel technique for improving coding and diversity gains in orthogonal frequency division multiplexing (OFDM) systems is proposed. Multidimensional symbol design based on complex field codes with interleaving across frequency has been known for some time now. However, such symbols cannot be concatenated to convolutional codes owing to the prohibitive complexity of decoding. A novel way of designing multidimensional symbols that allow to concatenate them to convolutional codes while maintaining a low decoding complexity is shown. The proposed multidimensional symbols are based on tailbiting convolutional codes and the design of codes is discussed with desirable properties. Also the design of bit interleaved coded modulation-type and trellis-coded modulation-type codes over these multidimensional symbols is shown. Simulations show that the proposed coding scheme provides significant performance and/or complexity improvements over existing alternatives and also provides more degrees of freedom for channel-based link adaptation.

关键词： orthogonal frequency division multiplexing convolutional codes interleaved codes channel coding decoding convolutional code concatenated code OFDM system OFDM modulation channel-based link adaptation trellis coded modulation concatenated codes multicarrier system trellis-coded modulation adaptive codes telecommunication links interleaved code multidimensional symbol design

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Modified enhanced max-log-maximum a posteriori algorithm using variable scaling factor

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IET COMMUNICATIONS 2007年第5期1卷 1061-1066页

作者： Kim, J. Kim, J. Park, H. Kim, B. Park, S. Informat & Commun Univ Sch Engn Taejon 305714 South Korea Elect & Telecommun Res Inst Commun Device Module Team Taejon 305700 South Korea

Using a variable scaling factor (VSF), a modified enhanced max-log-maximum a posteriori (EMLMAP) algorithm is proposed to improve the performance of the conventional EMLMAP algorithm which uses a fixed SF. The VSF, maximising the mutual information exchanged between component decoders in a turbo decoder, is adaptively varied with a priori information of each component decoder. For a large size of interleaver, it is shown that the proposed algorithm improves the bit error rate performance and speed of decoding convergence of the conventional EMLMAP algorithm. The improved speed of the decoding convergence reduces the average number of iterations and results in low-power implementations of a turbo decoder.

关键词： bit error rate interleaved codes maximum likelihood estimation turbo decoder low-power implementation component decoder modified enhanced max-log-maximum a posteriori algorithm error statistics iterative decoding convergence iterative decoding interleaved code variable scaling factor turbo codes

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