Compact, high-speed and high-coding-gain general purpose FEC encoder/decoder-NUFEC codec

Kubota, S.; Kato, Shuzo; Ishitani, T.; Nagatani, M.

doi:10.1109/icc.1989.49800

Cited by 19 publications

(2 citation statements)

References 3 publications

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“…It can be constructed in two ways: (1) The building data can be represented in 3 -d i m e n s i o n a l c o o r d i n a t e s (conventional) (2) The building data can be directly stored as photographs taken from central stations (new) In the first method, the size and position of each building is measured from two photographs taken separately from an airplane. In this method, modelling buildings and making a database from photographs is both time consuming and expensive.…”

Section: Automatic Line-of-sight Judgementmentioning

confidence: 99%

High-speed, broadband microwave access network

Manabe

Yoshida

Hashimoto

ICC 91 International Conference on Communications Conference Record

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Microwaves are effective for providing reasonable cost access lines for high-speed, broadband communication networks. However, several problems have become apparent that have made microwave systems less attractive to users. This paper examines both the features and the problems encountered in the use of microwaves. It also shows that point-to-point (P-P) access scheme with FEC is effective in making outage-free microwave links. Supporting tools on personal computers for reducing manpower in setting up microwave links are proposed. Finally, a network based on a combination of microwaves and fibers is proposed.

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Section: Automatic Line-of-sight Judgementmentioning

confidence: 99%

High-speed, broadband microwave access network

Manabe

Yoshida

Hashimoto

ICC 91 International Conference on Communications Conference Record

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“…Among the hi h-coding-rate Viterbi decoding schemes [ 21~[ 31! 41, NTT universal forward error correction (NUFEC) scheme [2] can realize effectively high-coding-rate Viterbi decoders without any additional operations such as bit stealing, dummy bit insertion and timing control. The developed VLSlCs can operate up to 25Mbps as one of the fastest commercially available Viterbi decoder VLSlCs and are easily applicable to coding-rates ranging from one-half to fifteen-sixteenth employing two kinds of the VLSICs.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high-speed and universal-coding-rate Viterbi decoder VLSIC-SNUFEC VLSI

Kawazoe

Honda

Kubota

et al.

Proceedings of ICC '93 - IEEE International Conference on Communications

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An Ultra-high-speed (higher than 60Mbps) Viterbi decoder VLSlC with coding rates from onehalf to fifteen-sixteenth and a constraint length of seven for fotward error correction (FEC) has been developed using 0.8-pm semi-custom CMOS LSlC technology. To reduce the power consumption of the one-chip high-coding-rate Viterbi decoder, a newly developed universal-coding-rate scarce-statetransition (SST) Viterbi decoding scheme and lowpower-consumption burst-mode-selection (BMS) path mempry have been employed. In addition, a new maxirhum-likelihood-decision (MLD) circuit for the SST Viterbi decoder has been developed to reduce the path memory length without coding-gain degradation. The developed Viterbi decoder VLSlC achieves a maximum data rate of 6OMbps with a power consumption of 2.5W and achieves near theoretical net coding-gain performance for various coding rates.

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