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IEEE Wireless Communications and Networking Conference (WCNC)

作者： Che, Hui Wu, Zhanji Kang, Weimin Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100876 Peoples R China

ISBN: (纸本)9781538676462

Faster-than-Nyquist (FTN) can improve the spectrum efficiency (SE) of transmission system. The inner code optimizations including precoder and doping code are introduced for high rate FTN in this paper. The optimal transmission waveform for high rate FTN system can be designed by optimizing the transmitter's precoder. Particle swarm optimization (PSO) is firstly employed to optimize the precoder for FTN. We further optimize the inner decoders EXIT characteristic by applying doping method. Simulation results verify that our method has 0.5dB precoding gain compared with the non-precoding scheme at the same SE;the optimization high rate FTN system has a 1.2dB gain compared to high order Nyquist at the same SE. The results demonstrate that high rate FTN is an efficient mechanism for improving the SE and the proposed joint optimization method is efficient.

关键词： FTN high rate precoder inner code PSO

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HIGH-RATE CONCATENATED CODING SYSTEMS USING BANDWIDTH EFFICIENT TRELLIS inner codeS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1989年第5期37卷 420-427页

作者： DENG, RH COSTELLO, DJ UNIV NOTRE DAME DEPT ELECT & COMP ENGNNOTRE DAMEIN 46556

High rate concatenated coding systems with bandwidth efficient trellis inner codes and Reed-Solomon (RS) outer codes are investigated for application in high-speed satellite communication sys- tems. Two concatenated coding schemes are proposed. In Scheme I, the inner code is decoded with soft-decision Viterbi decoding and the outer RS code performs error-correction only decoding (decoding without side information). In Scheme 11, the inner code is decoded with a modified Viterbi algorithm which produces reliability information along with the decoded output. In this algorithm, path metrics are used to estimate the entire information sequence, while branch metrics are used to provide reliabilityinformationon the *** informationis used to erase unreliable bits in the decoded output. An errors-anderasuresRS decoder is then used for the outer code. These two schemes have been proposed for high-speed data communicationon NASA satellite chan- nels. The ratesconsideredare at least double those used in current NASA systems, and our results indicate that high system reliability can still be achieved.

关键词： .outer code side information inner code RS code reliability information Coding Systems Trellis inner RS outer

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AN ERROR CONTROL-SYSTEM WITH MULTIPLE-STAGE FORWARD ERROR CORRECTIONS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1990年第10期38卷 1799-1809页

作者： TAKATA, T FUJIWARA, T KASAMI, T LIN, S UNIV HAWAII MANOA DEPT ELECT ENGNHONOLULUHI 96822

In this paper, a robust error control coding scheme is presented. The scheme is a cascaded FEC scheme supported by parity retransmissionsfor furthererrorcorrection in the erroneous data words. The error performance and throughput efficiency of the scheme are analyzed. Two specific schemes are studied. We show that both schemes provide high reliability and throughput efficiency even for high channel bitsrror rates in the range of 10 -*. The schemes are suitable for high data rate file transfer.

关键词： .error performance error correction FEC scheme outer code retransmissions inner code error control coding code is used throughput efficiency specific schemes parity symbols

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On bit-error probability of a concatenated coding scheme

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IEEE TRANSACTIONS ON COMMUNICATIONS 1997年第5期45卷 536-543页

作者： Kasami, T Takata, T Yamashita, K Fujiwara, T Lin, S OSAKA UNIV FAC ENGN SCI TOYONAKA OSAKA 560 JAPAN UNIV HAWAII MANOA DEPT ELECT ENGN HONOLULU HI 96822 USA

This paper presents a method for evaluating the bit-error probability of a concatenated coding system for BPSK transmission over the AWGN channel, In the concatenated system, a linear Binary block code is used as the inner code and is decoded with the soft-decision maximum likelihood decoding, and a maximum distance separable code (or its interleaved code) is used as the outer code and is decoded with a bounded distance decoding, The method is illustrated through a specific example in which the inner code is a binary (64,40,8) Reed-Muller subcode and the outer code is the NASA standard (255,223,33) Reed-Solomon code over GF(2(8)) interleaved to a depth of 5, This specific concatenated system is being considered for NASA's high-speed satellite communications, The bit-error performance is evaluated by a combination of simulation and analysis, The split weight enumerators for the maximum distance separable codes are derived and used for the analysis.

关键词： .outer code Coding Scheme inner code soft-decision block code subcode evaluating the bit-error concatenated coding system bit-error performance

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THE PERFORMANCE ANALYSIS OF A CONCATENATED ARQ SCHEME USING PARITY RETRANSMISSIONS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1991年第12期39卷 1869-1874页

作者： LIN, MC GUU, MY Department of Electrical Engineering National Taiwan University Taipei Taiwan

This paper analyzes an ARQ scheme using parity retransmissions. By dividing each transmission block into subblocks, the combination of a transmission block and its retransmission block has the structure of a concatenated code. We derive formulae for calculating an upper bound on the probability of undetected errors and a lower bound on the throughput for such an ARQ scheme. Numerical results show that even with extremely simple inner code design, such an ARQ scheme has satisfactory performance.

关键词： .codeword Retransmissions inner code error patterns ARQ schemes Using Parity

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A serial concatenation approach to iterative demodulation and decoding

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IEEE TRANSACTIONS ON COMMUNICATIONS 1999年第7期47卷 956-961页

作者： Narayanan, KR Stüber, GL Texas A&M Univ Dept Elect Engn College Stn TX 77843 USA Georgia Inst Technol Sch Elect & Comp Engn Atlanta GA 30332 USA

Iterative demodulation and decoding of convolutionally encoded data is treated as a special case of the recently proposed serial concatenation of interleaved codes. It is shown that by exploiting the recursive nature of the differential modulation schemes (for example, DBPSK, DQPSK, CPM, etc.), large interleaving gains tan be achieved similar to serial concatenation schemes. We also show that when memoryless modulation is used, preceding can be used to create a rate-1 recursive inner code in order to obtain interleaving gains without adding redundancy from the inner code.

关键词： .outer code inner code DPSK DQPSK Concatenation Iterative Demodulation SCCC

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HYBRID ARQ SCHEMES EMPLOYING codeD MODULATION AND SEQUENCE COMBINING

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IEEE TRANSACTIONS ON COMMUNICATIONS 1994年第6期42卷 2239-2245页

作者： DENG, RH Department of Electrical Engineering National University of Singapore Kent Ridge 05 11 Singapore

In this paper, we propose and analyze two hybrid automatic-repeat-request (ARQ) schemes employing bandwidth efficient coded modulation and coded sequence combining. In the first scheme, a trellis-coded modulation (TCM) is used to control channel noise;while in the second scheme a concatenated coded modulation is employed. The concatenated coded modulation is formed by cascading a Reed-Solomon (RS) outer code and a block coded modulation (BCM) inner code. In both schemes, the coded modulation decoder, by performing sequence combining and soft-decision maximum likelihood decoding, makes full use of the information available in all received sequences corresponding to a given information message. It is shown, by means of analysis as well as computer simulations, that both schemes are capable of providing high throughput efficiencies over a wide range of signal-to-noise ratios. The schemes are suitable for large file transfers over satellite communication where high throughput and high reliability are required.

关键词： .ratios BCM channel noise inner code signal-to-noise soft-decision error-detection RS outer

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INTERLEAVED CONCATENATED CODING FOR THE TURBULENT ATMOSPHERIC DIRECT DETECTION OPTICAL COMMUNICATION CHANNEL

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IEEE TRANSACTIONS ON COMMUNICATIONS 1989年第6期37卷 648-651页

作者： KOH, YT DAVIDSON, F Department of Electrical and Computer Engineering Johns Hopkins University Baltimore MD USA

The performanceof two concatenated coding systems using a K = 3, r = 1/2 convolutional inner code and a Reed-Solomon (15,9) or (15, 7) outer code was measured over a 5.76 km long atmospheric direct detection optical communicationchannel. inner code interleaving of 100 ps combined with outer code interleaving of 240 bits (60RS symbols)was found to be sufficientto obtain a decodedBER of less than under conditions of moderate channel turbulence(U; = 0.6) and ~ an average of 6-10 detected photons per channel bit.

关键词： .interleaving outer code inner code soft-decision Direct Detection COM pp Optical Communication Channel channel turbulence

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Asymptotic Performance Comparison of Concatenated codes with Different inner Decoding Schemes in Frequency-Hopping Spread Spectrum Packet Radio Networks 8

Asymptotic Performance Comparison of Concatenated Codes with...

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8th International Conference on Ubiquitous and Future Networks (ICUFN)

作者： Lee, Ye Hoon Kim, Dong Ho Cho, Sunghyun Seoul Natl Univ Sci & Technol Dept Elect & IT Media Engn 232 Gongneung Ro Seoul 01811 South Korea Hanyang Univ Dept Comp Sci & Engn 55 Hanyangdaehak Ro Ansan 15588 South Korea

ISBN: (纸本)9781467399913

In this paper, we analyze the performance of a concatenated code with two different inner decoding schemes. One is the error-detecting inner decoding, and the other is the error-detecting-and-correcting inner decoding scheme. We compare the asymptotic performances of the two decoding schemes for the infinite block length when the concatenated code is applied to slow frequency-hopping spread-spectrum packet radio communication systems.

关键词： Concatenated code inner code decoding scheme frequency hopping multiple access channel

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Concatenated codes in Frequency-Hopping Spread-Spectrum Multiple Access (FH-SSMA) Packet Radio Communications

Concatenated Codes in Frequency-Hopping Spread-Spectrum Mult...

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KICS-IEEE International Conference on Information and Communications / Samsung LTE and 5G Special Workshop

作者： Lee, Ye Hoon Seoul Natl Univ Sci & Technol Dept Elect & IT Media Engn Seoul South Korea

ISBN: (纸本)9781538609620

We analyze the performance of a concatenated code with two different inner decoding schemes. One is the error-detecting inner decoding, and the other is the error-detecting-and- correcting inner decoding scheme. We compare the performances of the two decoding schemes when the concatenated code is applied to slow frequency-hopping spread-spectrum multiple access (FH-SSMA) communication systems.

关键词： concatenated codes inner code FH-SSMA

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