[특허]Synchronous spread-spectrum communications system and method

Synchronous spread-spectrum communications system and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04K-001/00
출원번호	US-0626109 (1990-12-14)
발명자 / 주소	Schilling Donald L. (Sands Point NY)
출원인 / 주소	InterDigital Technology Corporation (Wilmington DE 02)
인용정보	피인용 횟수 : 209 인용 특허 : 0

초록 ▼

A spread spectrum communications system for use over a communications channel, including a transmitter-generic-chip-code generator, a transmitter-message-chip-code generator, an EXCLUSIVE-OR gate, a combiner, a transmitter, a receiver-generic-chip-code generator, a receiver-generic mixer, a generic-bandpass filter, a receiver-message-chip-code generator, a receiver-message mixer, a message-bandpass filter, and a synchronous detector. The transmitter-generic-chip-code generator generates a generic-chip-code signal and the transmitter-message-chip-code generator generates a message-chip-code signal. The EXCLUSIVE-OR gate spread-spectrum processes message data with the message-chip-code signal to generate a spread-spectrum signal. The combiner combines the generic-chip-code signal with the spread-spectrum-processed signal. The transmitter transmits the combined generic-chip-code signal and spread-spectrum signal, on a carrier signal over the communications channel as a spread-spectrum-communications signal. The receiver-generic-chip-code generator generates a replica of the generic-chip-code signal. The generic mixer recovers the carrier signal from the spread-spectrum-communications signal. The receiver-message-chip-code generator generates a replica of the message-chip-code signal. The receiver-message mixer despreads the spread-spectrum-communications signal as a modulated-data signal. The tracking and acquisition circuit uses the recovered carrier signal for synchronizing the replicas of the generic-chip-code signal to the recovered carrier signal. The synchronous detector synchronously demodulates the modulated-data signal as received data.

대표청구항 ▼

A spread spectrum communications system for use over a communications channel, comprising: a transmitter-generic-chip-code generator for generating a generic-chip-code signal; a transmitter-message-chip-code generator for generating a message-chip-code signal; an EXCLUSIVE-OR gate coupled to said transmitter-message-chip-code generator for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; a combiner coupled to said transmitter-generic-chip-code generator and said EXCLUSIVE-OR gate for combining the generic-chip-code signal with the spread-spectrum-processed signal; a transmitter coupled to said combiner for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal, on a carrier signal over said communications channel as a spread-spectrum-communications signal; a receiver-generic-chip-code generator for generating a replica of the generic-chip-code signal; a generic mixer coupled to said receiver-generic-chip-code generator for recovering the carrier signal from the spread-spectrum-communications signal; a receiver-message-chip-code generator coupled to said receiver-generic-chip-code generator and synchronized to the replica of the generic-chip-code signal for generating a replica of the message-chip-code signal; a message mixer coupled to said receiver-message-chip-code generator and responsive to the replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as a modulated-data signal; a message-bandpass filter coupled to said message mixer for filtering the modulated-data signal; a generic-bandpass filter coupled to said generic mixer for filtering the recovered-carrier signal recovered from the spread-spectrum-communications signal; a tracking and acquisition circuit coupled to an output of said generic-bandpass filter and to said receiver-generic-chip-code generator, said tracking and acquisition circuit responsive to acquiring and tracking the recovered-carrier signal for synchronizing the generic-chip-code signal to the recovered-carrier signal; a power splitter coupled between said communications channel, said generic mixer and said message mixer for dividing the spread-spectrum-communications signal between said generic mixer and said message mixer; and a synchronous detector coupled to said message-bandpass filter, responsive to the recovered carrier signal recovered by the generic-mixer device for synchronously demodulating the modulated-data signal as a detected signal.

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Evans, Douglas B.; Conwell, William Y., Substituting information based on watermark-enable linking.
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Evans,Douglas B.; Conwell,William Y., Substituting objects based on steganographic encoding.
상세보기
Evans, Douglas B.; Conwell, William Y., Substituting or replacing components in media objects based on steganographic encoding.
상세보기
Ozluturk,Fatih M.; Lomp,Gary R., System for using rapid acquisition spreading codes for spread-spectrum communications.
상세보기
Howard, James V.; Frazier, Francis; Siamak, Parviz, Systems and methods for managing and detecting fraud in image databases used with identification documents.
상세보기
Ramos, Daniel O.; Jones, Kevin C.; Rhoads, Geoffrey B., Systems and methods for processing content objects.
상세보기
Jones, Robert, Systems, compositions, and methods for full color laser engraving of ID documents.
상세보기
Jones, Robert L.; Bi, Daoshen; Yeh, Tung-Feng, Tamper evident adhesive and identification document including same.
상세보기
Jones, Robert L.; Kenen, Leo M., Three dimensional data storage.
상세보기
Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Traffic lights in a code division multiple access (CDMA) modem.
상세보기
Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Transferring voice and non-voice data.
상세보기
Fomukong, Mundi; Chesney, Denzil Willoughby, Updating a mobile device's location.
상세보기
Lomp Gary R., Variable bandwidth spread spectrum device.
상세보기
Geoffrey B. Rhoads, Video copy-control with plural embedded signals.
상세보기
Rhoads Geoffrey B., Video steganography.
상세보기
Rhoads,Geoffrey B., Video steganography.
상세보기
Geoffrey B. Rhoads ; Ravi K. Sharma, Watermark detection using a fourier mellin transform.
상세보기
Rhoads, Geoffrey B., Watermark embedder and reader.
상세보기
Rhoads, Geoffrey B.; Gustafson, Ammon E., Watermark embedder and reader.
상세보기
Geoffrey B. Rhoads, Watermark enabled video objects.
상세보기
Rhoads,Geoffrey B.; Levy,Kenneth L.; McKinley,Tyler J., Watermark encoded video, and related methods.
상세보기
Geoffrey B. Rhoads, Watermark encoding method exploiting biases inherent in original signal.
상세보기
Rhoads, Geoffrey B., Watermarking methods and media.
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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

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Synchronous spread-spectrum communications system and method 원문보기

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Synchronous spread-spectrum communications system and method 원문보기

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