[특허]Method and apparatus for using orthogonal coding in a communication system

Method and apparatus for using orthogonal coding in a communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-027/30 H04K-001/00
출원번호	US-0751372 (1991-08-28)
발명자 / 주소	Falconer David D. (33 Abingdon Dr. Nepean Ontario MA CAX K2H 7M5) Ling Fuyun (202 Chestnut Ave. Jamaica Plain MA 02130)
인용정보	피인용 횟수 : 63 인용 특허 : 0

초록 ▼

A method and apparatus is provided for encoding and decoding. In encoding, bits (202) are encoded (204) into symbols (206) such that maximum likelihood decoding is facilitated. Groups of symbols (206) are translated by either interleaving by group each group within a block (208) and subsequently deriving an orthogonal code from each group (212) or deriving an orthogonal code from each group and subsequently interleaving by code each code within a block. In decoding, groups of samples (228, 229) are transformed by either generating metrics and index symbols (242) for each group of samples (232, 234, 236, 238, 240) are subsequently deinterleaving by group each group of metrics within a block (244) or deinterleaving by group each group of samples within a block and subsequently generating metrics and index symbols for each deinterleaved group of samples. Each metric represents the confidence that a group of samples is a particular orthogonal code. Subsequently, maximum likelihood decoding (266) generates an estimated bit (268) from the index symbols and metrics (260).

대표청구항 ▼

An apparatus comprising a signal decoder, the signal decoder comprising: (a) grouping means for grouping received data samples of a signal; (b) transforming means, operatively coupled to the grouping means, for transforming the groups of data samples into index data symbols and associated deinterleaved soft decision metrics according to an algorithm selected from the group consisting essentially of (i) generating a plurality of soft decision similarity metrics and index data symbols for each group of data samples such that one index data symbol is associated with each soft decision metric and subsequently deinterleaving by group each group of soft decision metrics within a predetermined size block and (ii) deinterleaving by group each group of data samples within a predetermined size block and subsequently generating a plurality of soft decision similarity metrics and index data symbols for each deinterleaved group of data samples such that one index data symbol is associated with each soft decision metric, each soft decision metric corresponding to a measure of confidence that a particular group of data samples is substantially similar to a particular orthogonal code from within a set of mutually orthogonal codes; and (c) decoding means, operatively coupled to the transforming means, for generating at least one estimated data bit by utilizing maximum likelihood decoding techniques to derive the at least one estimated data bit from the index data symbols and associated soft decision metrics.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Method and apparatus for using orthogonal coding in a communication system 원문보기

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Method and apparatus for using orthogonal coding in a communication system 원문보기

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