Error Correction Coding

Moon, Todd K.

doi:10.1002/0471739219

Cited by 612 publications

(212 citation statements)

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“…Since pseudo-random sequences are non-orthogonal, collisions will occur between different channels (or users). Thus the system requires heavy use of Forward Error Correction (FEC, see [15] and references therein) to provide a required Bit Error Rates (BER) according to the capacity of the system. In this paper, we show that the use of FEC allows attaining a peak medium utilization of approximately 35%, close to that of the slotted-aloha protocol, a similar but non-secure transmission scheme [16].…”

Section: Secure Time-hopping Cdmamentioning

confidence: 99%

“…In experiments, delay (the time for a bit to traverse the network) was very high, due to Reed-Solomon 223/255 coding, a frame to support up to 16 users and the low capacity of the physical media. A more sensible choice of FEC algorithm (like BCH [15]) could drastically reduce data delay. Simple pulse shaping is realized using a pass-band filter at the output of the modulation and also at the input of the demodulator.…”

Section: Modulation and Synchronizationmentioning

confidence: 99%

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Encrypted CDMA Audio Network

Ortega¹,

Bettachini²,

Fierens³

et al. 2014

JIS

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We present a secure LAN using sound as the physical layer for low speed applications. In particular, we show a real implementation of a point-to-point or point-to-multipoint secure acoustic network, having a short range, consuming a negligible amount of power, and requiring no specific hardware on mobile clients. The present acoustic network provides VPN-like private channels to multiple users sharing the same medium. It is based on Time-hopping CDMA, and makes use of an encrypted Bloom filter. An asymmetrical error-correction is used to supply data integrity, even in the presence of strong interference. Simulations and real experiments show its feasibility. We also provide some theoretical analysis on the principle of operation.

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Section: Secure Time-hopping Cdmamentioning

confidence: 99%

Section: Modulation and Synchronizationmentioning

confidence: 99%

Encrypted CDMA Audio Network

Ortega¹,

Bettachini²,

Fierens³

et al. 2014

JIS

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“…They are usually represented by bipartite Tanner graphs [14], connecting Bit Nodes (BN) and Check Nodes (CN). The in-formation received from the channel is propagated, processed and exchanged between neighboring nodes of the graph, as depicted by the arrows in figure 1.…”

Section: Dvb-s2 Ldpc Codes and Decoding Algorithmmentioning

confidence: 99%

Real-time DVB-S2 LDPC decoding on many-core GPU accelerators

Falcão

Andrade

Silva

et al. 2011

2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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It is well known that LDPC decoding is computationally demanding and one of the hardest signal operations to parallelize. Beyond data dependencies that restrict the decoding of a single word, it requires a large number of memory accesses. In this paper we propose parallel algorithms for performing in GPUs the most demanding case of irregular and long length LDPC codes adopted in the Digital Video BroadcastingSatellite 2 (DVB-S2) standard used in data communications. By performing simultaneous multicodeword decoding and adopting special data structures, experimental results show that throughputs superior to 90 Mbps can be achieved when LDPC decoders for the DVB-S2 are implemented in the current GPUs.

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Section: Signal Constructionmentioning

confidence: 99%

“…A simple but powerful outer Reed-Solomon code can improve this by another 1 dB at the cost of minor bandwidth expansion. Higher coding gain can be obtained by more complex low-density parity-check (LDPC) or turbo codes [18].Trellis-coded modulation, in spite of its limited coding gain, offers a compact, low-power, low-latency decoding which can be combined with a decision feedback equalizer to eliminate error propagation by replacing the tentative decision with more . LDPC-assisted coded modulation is adopted for the 10GBASE-T standard [21].…”

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confidence: 99%

High-Speed Access over Copper: Rate Optimization and Signal Construction

Enteshari¹,

Fadlullah²,

Kavehrad³

2009

ETRI J

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This paper focuses on assessment and design of transmission systems for distribution of digital signals over standard Category-7A copper cables at speeds beyond 10 Gbps. The main contribution of this paper is on the technical feasibility and system design for data rates of 40 Gbps and 100 Gbps over copper. Based on capacity analysis and rate optimization algorithms, system parameters are obtained and the design implementation trade-offs are discussed. Our simulation results confirm that with the aid of a decision-feedback equalizer and powerful coding techniques, namely, TCM or LDPC code, 40 Gbps transmission is feasible over 50 m of CAT-7A copper cable. These results also indicate that 100 Gbps transmission can be achieved over 15 m cables. Keywords: 40GBASE-T, single-carrier capacity, SISO, MIMO.Manuscript received Apr. 30, 2009; accepted July 8, 2009. This work was supported by Berk Tek-Nexans, New Holland PA, USA. Ali Enteshari (phone: +1 814 865 0183, email: enteshari@psu.edu), Jarir M. Fadlullah (email: jmf414@psu.edu), and Mohsen Kavehrad (email: mkavehrad@psu.edu) are with the Department of Electrical Engineering, Pennsylvania State University, University Park, PA, USA.doi:10.4218/etrij.09.0109.0231 I. IntroductionIn the commercial market, the extension of fiber into access networks in small businesses and dense metropolitan areas is a new challenge. It has been known for some time that a major bottleneck in delivering multimedia services to computer users is the low-capacity of LANs. With ever-increasing demand for higher capacities, the need for broadband access is transformed from a convenience to a necessity. So far, data communication has been the main driving force behind increased traffic on the communication networks. Applications stemming from a wide range of disciplines, such as high-performance computing, consumer multimedia, teleconferencing, and telemedicine, are just a few examples that require data rates in the gigabits per second range. To keep up with this explosive growth, ultra highcapacity networks were required, and thus optical networks with terabit capacities have dominated the network core. To enable the end user to take full advantage of this core, reliable high-speed LAN access is required. Providing service in a broadband access LAN using a copper cable approach has the advantages of the network being highly-dependable and cost-effective. This will benefit the providers of service over campus settings, such as hospitals, industry compounds, or universities, with facilities spread over several buildings, in that a quick service upgrade could extend new service offerings. Also, within server farms and data centers, short copper connectors are preferable.After the release of 10GBASE-T, which supports data rates of 10 Gbps up to a distance of 100 meters (for connecting work areas to a telecommunications room), many IEEE members recognized the potential for higher speed and are currently thinking of ways to deliver tens of Gigabits per second over copper cables. The 10GBASE-T standa...

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Error Correction Coding

Cited by 612 publications

References 0 publications

Encrypted CDMA Audio Network

Encrypted CDMA Audio Network

Real-time DVB-S2 LDPC decoding on many-core GPU accelerators

High-Speed Access over Copper: Rate Optimization and Signal Construction

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