[특허]High speed binary data communication system

High speed binary data communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-027/18
출원번호	US-0861049 (1986-05-08)
발명자 / 주소	Walker Harold R. (78 Oliver Ave. Edison NJ 08817)
인용정보	피인용 횟수 : 73 인용 특허 : 0

초록 ▼

There is disclosed a high speed data transmission system for transmitting a binary data signal over a communications path. The binary data signal is clocked at a given period. The system comprises encoded means responsive to a binary NRZ input data signal to provide at an output an encoded digital signal having time periods greater than multiples of the clock period, whereby the encoded signal occupies a lesser effective bandwidth than the NRZ signal would occupy. There are balanced modulator means having an input responsive to the encoded signal and another input adapted to receive a carrier frequency to provide at an output a double sideband suppressed carrier signal. Coupled to the output of the balanced modulator are narrow bandwidth filtering means including first low pass and second high pass parallel filter paths each having a common input terminal coupled to the output of the modulator. The ouputs of the low and high pass filters are symmetrically combined to provide a narrow single sideband signal for transmission characterized in that transitions between binary levels in said encoded signal are manifested by distinct phase changes in said single sideband signal.

대표청구항 ▼

In a high speed data transmission system for transmitting a binary NRZ data signal over a communications path, said signal transmitted as a narrow single sideband signal characterized in that there are distinct phase angle changes in said signal indicative of binary data transitions as from a zero to a one or a one to a zero, said sideband signal as transmitted being completely devoid of a carrier frequency and having only a portion of a sideband containing NRZ information in combination therewith, decoding means for such a single sideband signal, comprising: a limiter having an input adapted to receive said single sideband signal for providing at an output a limited version of said signal; a phase change detector means having an input coupled to said output of said limiter and having a voltage controlled oscillator tuned to the approximate center frequency of said sideband signal for providing a signal consisting of pulses at the output indicative of said distinct phase angle changes, and decoding means coupled to the output of said phase change detector means for restoring a binary NRZ data signal from said pulses.

이 특허를 인용한 특허 (73)

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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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연합인증

High speed binary data communication system 원문보기

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High speed binary data communication system 원문보기

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