[특허]Frequency hopping code division multiple access system and method

Frequency hopping code division multiple access system and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-013/06
출원번호	US-0297449 (1994-08-29)
발명자 / 주소	Schilling Donald L. (Sands Point NY)
출원인 / 주소	InterDigital Technology Corporation (Wilmington DE 02)
인용정보	피인용 횟수 : 63 인용 특허 : 0

초록 ▼

A frequency-hopping-communications system, assigned a system bandwidth B, with the system bandwidth B divided into N sets of frequencies, with each set of the N sets of frequencies not having the same frequencies as other sets of the N sets of frequencies, for communicating base-message data to a plurality of remote units. The frequency-hopping-communications system includes a plurality of base stations for communicating base-message data to the plurality of remote units. Each of the base stations has a coverage area divided into a plurality of N concentric regions which are divided into a plurality of N sectors, with each sector of each concentric region assigned one of the N sets of frequencies. For communicating with a selected-remote unit located within a particular sector of a particular-concentric region, each base station has a modulator for converting the base-message data to a form suitable for sending over radio waves, a frequency-hopping device for frequency hopping the converted-base-message data over a set of frequencies assigned to the particular sector of the particular-concentric region, thereby generating a frequency-hopped signal, a controller, responsive to the selected-remote unit being located in the particular sector of the particular-concentric region, for controlling the set of frequencies used by the frequency-hopping device, a power amplifier for amplifying the frequency-hopped signal from the base station to the remote unit, and a base antenna coupled to the power amplifier for radiating the frequency-hopped signal. Each of the remote units has a receiver for recovering from the frequency-hopped signal the base-message data.

대표청구항 ▼

A frequency-hopping-communications system, assigned a system bandwidth B, with the system bandwidth B divided into N sets of frequencies, with each set of the N sets of frequencies not having the same frequencies as other sets of the N sets of frequencies, for communicating base-message data to a plurality of remote units, said frequency-hopping-communications system comprising: a plurality of base stations for communicating base-message data to the plurality of remote units, each of said plurality of base stations having a coverage area divided into a plurality of N concentric regions with each concentric region divided into a plurality of N sectors, with each sector of each concentric region assigned one of the N sets of frequencies, each of said plurality of base stations for communicating with a selected-remote unit located within a particular sector of a particular-concentric region, including, base-modulator means for converting the base-message data to a form suitable for sending over radio waves; base-hopping means for frequency hopping the converted-base-message data over a set of frequencies assigned to the particular sector of the particular-concentric region, thereby generating a frequency-hopped signal; base-power means for amplifying the frequency-hopped signal; a base antenna coupled to said base-power means for radiating the frequency-hopped signal from each of said plurality of base stations to said selected-remote unit, said base antenna including means for sectoring the coverage area into the plurality of N sectors; and base-controller means, responsive to said selected-remote unit located within the particular sector of the particular-concentric region, for controlling the set of frequencies used by said base-hopping means for communicating with said selected-remote unit; each of said plurality of remote units including, a remote antenna; and remote-receiver means for recovering from the frequency-hopped signal the base-message data.

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Schilling Donald L., Frequency hopping code division multiple access system and method.
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Schilling Donald L., Frequency hopping code division multiple access system and method.
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Frequency hopping code division multiple access system and method 원문보기

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Frequency hopping code division multiple access system and method 원문보기

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