[특허]Identification of encoder type through observation of data received

[미국특허] Identification of encoder type through observation of data received 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-011/10 H03M-013/12 H03D-001/00 H04L-027/06
출원번호	US-0876319 (1992-04-30)
발명자 / 주소	Parr Michael I. (San Diego CA)
출원인 / 주소	Hughes Aircraft Company (Los Angeles CA 02)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

A receiver for use in digital cellular communication systems determines the type of data transmitted without having to decode the data. Digital cellular communication systems typically use convolutional forward error correction (FEC) coding to allow for error detection and correction at the receiver. The type of encoding is different depending on whether voice data or control data is transmitted. In general, FEC coding is a redundant coding of the encoded data so that for a given encoding algorithm with FEC coding, there will be a limited number of valid code sequences less than the total possible number of code sequences for a transmission of the same number of bits. This characteristic is used to identify the type of encoding without decoding the received information. Consequently, decoding requirements are reduced to those corresponding to the active transmitting encoder, resulting in receiver complexity reduction.

대표청구항 ▼

A receiver for use in communication systems in which data may be encoded with any one of a plurality of encoding algorithms, encoded data having only a limited number of valid sequences less than a total number of possible combinations for a given input bit pattern, said receiver comprising: demodulator means for recovering a transmitted encoded data stream; a plurality of decoders, one for each of said plurality of encoding algorithms; switch means for selectively directing said encoded data stream from said demodulator means to one of said plurality of decoders; and control means responsive to said encoded data stream for determining the type of data transmitted without decoding the data by examining code patterns and comparing with valid code patterns for each of said plurality of encoding algorithms and controlling said switch means depending on which of said plurality of encoding algorithms was used to encode transmitted data.

이 특허를 인용한 특허 (20) 인용/피인용 타임라인 분석

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Pons, Julien; Duvaut, Patrick; Moreno, Oliver; Pierrugues, Laurent, Hierarchical trellis coded modulation.
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Pons, Julien; Duvaut, Patrick; Moreno, Oliver; Pierrugues, Laurent, Hierarchical trellis coded modulation.
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St. John James T. ; Janky William O., Message encoding technique for communication systems.
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Alex Krister Raith ; Francois Sawyer CA; Ray Henry, Method and apparatus for distinguishing between a digital control channel and a digital traffic channel in a radiocommunication system.
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Coombs, Robert; Talbot, Jonathan; Worm, Alexander, Method and apparatus for implementing a data processor adapted for turbo decoding.
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Coombs,Robert; Talbot,Jonathan; Worm,Alexander, Method and apparatus for implementing a data processor adapted for turbo decoding.
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Alanara Seppo,JPX, Method and apparatus for transmitting DTX--low state information from mobile station to base station.
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Burshtein David,ILX, Method and device for detecting rate.
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Burshtein, David, Method and device for detecting rate.
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Atallah Isa Bisher, Method and system for decoding tailbiting convolution codes.
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Cioffi John M. (Cupertino CA) Tong Po (Fremont CA) Aslanis James T. (Mountain View CA) Gooch Antoinette H. (Palo Alto CA), Multicarrier modulation transmission system with variable delay.
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Park Chang-Soo,KRX, Selection of turbo or non-turbo error correction codes based on data type or length.
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Ikeda Yasunari (Kanagawa JPX) Ikeda Tamotsu (Tokyo JPX) Okada Takahiro (Chiba JPX), Transmission of data by using convolutional coding of different code rates and the encoded data reception including deco.
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De Bart Abraham J.,NLX ; Steenhof Frits A.,NLX, Transmission system with improved lock detection.
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Zimmermann,Gerd; Li,Hui; Wenger,Fabian; Lindskog,Jan; Pauli,Mathias, Unequal error protection in a packet transmission system.
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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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[미국특허] Identification of encoder type through observation of data received 원문보기