[특허]Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or

Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-001/66 H04J-004/00 H04Q-007/22 H04Q-007/30
출원번호	US-0724930 (1996-10-02)
발명자 / 주소	Paneth Eric,ILX Handzel Mark J. Morley Steven Allan Avis Graham M.
출원인 / 주소	InterDigital Technology Corporation
대리인 / 주소	Volpe and Koenig, P.C.
인용정보	피인용 횟수 : 86 인용 특허 : 0

초록 ▼

A terrestrial Rf telephone system provides a plurality of voice signal channels on a plurality of forward direction carrier frequencies, each carrier frequency having an associated predetermined bandwidth which is designed to accommodate one analog voice signal, and each carrier frequency containing a plurality of slots. The system includes a base station having a plurality of circuit paths for receiving a plurality of forward direction digitized voice signals; a plurality of compressors for compressing the voice signals; a processor for assigning each of the compressed voice signals onto a dynamically assigned frequency/slot; a plurality of channel controllers, each for sequentially combining the compressed digitized voice signals into a single transmit channel bit stream, with each compressed voice signal occupying a respective repetitive sequential time slot in the transmit channel bit stream; and a plurality of modulators for modulating the carrier frequencies. A portion of the carrier frequency within a portion of each slot remains unmodulated by the transmit channel bit stream to provide a phase reference signal.

대표청구항 ▼

[ We claim:] [1.] An apparatus for providing a plurality of voice signal channels on a plurality of forward direction carrier frequencies of a terrestrial RF telephone system, each of said forward direction carrier frequencies containing a plurality of slots, each of said forward direction carrier frequencies having an associated predetermined bandwidth which is designed to accommodate one analog voice signal channel therein, said apparatus comprising:a base station comprising:a plurality of circuit paths for receiving a plurality of forward direction digitized voice signals from a public switched telephone network;a plurality of compressors for respectively compressing each of said forward direction digitized voice signals by analyzing the speech content of said forward direction digitized voice signals and by using voice compression to form respective forward direction compressed digitized voice signals, each compressed digitized voice signal having a bit rate of less than 16 kb/s;a processor for assigning each of the compressed digitized voice signals a dynamically assigned frequency/slot;a plurality of channel controllers, each for sequentially combining said respective forward direction compressed digitized voice signals into a single transmit channel bit stream, with each of the respective forward direction compressed digitized voice signals occupying a respective repetitive sequential time slot in the transmit channel bit stream;a plurality of modulators for modulating each of said forward direction carrier frequencies with said transmit channel bit stream, each of said modulators using M-ary modulation to transmit at least 2 bits/symbol, wherein a carrier frequency within a portion of each said slot remains unmodulated by said transmit channel bit stream; anda transmitter for RF transmitting said forward direction modulated frequency carriers to at least one subscriber station, each of said transmitted modulated forward direction carrier frequencies residing within said predetermined bandwidth and capable of carrying in the forward direction at least two bidirectional simultaneous conversations; wherein at least part of said slot portion unmodulated with said transmit channel bit stream provides a phase reference signal.

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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
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (86)

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