Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Patent
1996-10-10
2000-10-17
Baker, Stephen M.
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
714758, 714774, 714780, 714795, H03M 1329, H03M 1335, H04L 102, H04L 120
Patent
active
061346942
ABSTRACT:
In an error control device, an error correction decoding portion 33 selects a bit position which has low reliability from the received signal by means of a predetermined bit number, generates error patterns by assuming that the errors exist at the bit position, and carries out modified Chase decoding for the received signals on the basis of each error pattern in modified Chase decoding portion 332. Modified Chase decoding portion 332 calculates the reliability of each error pattern by using the reliability of each bit in the received signal.
REFERENCES:
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Lugand, L., et al., Parity Retransmission Hybrid ARQ Using Rate 1/2 Convolutional Codes on a Nonstationary Channel, IEEE Transactions on Communications, vol. 37, No. 7, Jul. 1989, pp. 755-765.
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Kaneko, T., et al., An Efficient Maximum-Likelihood-Decoding Algorithm For Linear Block Codes With Algebraic Decoder, IEEE Transactions on Information Theory, vol. 40, No. 2, Mar. 1994, pp. 320-327.
Mandelbaum, D., An Adaptive-Feedback Coding Scheme Using Incremental Redundancy, IEEE Transactions on Information Theory, May 1994, pp. 388-389.
Loeliger, H-A., A Practical Reliability Metric for Block Codes Used on Binary-Input Channels, IEEE Transactions on Communications, vol. 38, No. 4, Apr. 1990, pp. 405-408.
Aridhi, S., et al., Performance Analysis of Type-I and Type-II Hybrid ARQ Protocols using Concatenated Codes in a DS-CDMA Rayleigh fading Channel, 4th International Conference on Universal Personal Communications, pp. 748-752.
Chase, D., Code Combining--A Maximum-Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets, IEEE Transactions on Communications, vol. 33, No. 5, May 1985, pp. 385-393.
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Uebayashi Shinji
Zhao Hui
Baker Stephen M.
NTT Mobile Communications Network Inc.
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