Frequency hopping code division multiple access system and method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-001/713
H04J-013/06
H04Q-007/22
출원번호
US-0542346
(1995-10-12)
발명자
/ 주소
Schilling Donald L. (Sands Point NY)
출원인 / 주소
InterDigital Technology Corporation (Wilmington DE 02)
인용정보
피인용 횟수 :
49인용 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 pl
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 with each concentric region assigned one of the N sets of frequencies. For communicating with a selected-remote unit located within 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-concentric region, thereby generating a frequency-hopped signal, a controller, responsive to the selected-remote unit being located in the particular-concentric region, for controlling the set of frequencies use by said frequency-h 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 method for communicating base-message data to a plurality of remote units, and for communicating remote unit transmissions to a plurality of base stations, said plurality of base stations communicating base-message data to said plurality of remote units using an as
A frequency-hopping-communications method for communicating base-message data to a plurality of remote units, and for communicating remote unit transmissions to a plurality of base stations, said plurality of base stations communicating base-message data to said plurality of remote units using an assigned system bandwidth B, with the assigned system bandwidth B divided into six sets of frequencies, with each set of the six sets of frequencies having different frequencies from frequencies used in the other sets, each of said plurality of base stations having a coverage area divided into six sectors, with each of said six sectors divided into six concentric regions, with each concentric region of each sector assigned one of the six sets of frequencies, each of said plurality of base stations for communicating with a selected-remote unit located within a particular concentric region of a particular sector, the method including the steps of, converting the base-message data to a form suitable for sending over radio waves; frequency hopping the converted-base-message data over a first set of frequencies, F1, assigned to a first concentric region of a first sector, thereby generating a frequency-hopped signal using the first set of frequencies, the first set of frequencies having frequencies different from other sets of frequencies used in other concentric regions within the first sector; controlling, in response to said selected-remote unit being located in the first concentric region of the first sector, the set of frequencies used by a radiating base station for communicating with said selected-remote unit; amplifying the frequency-hopped signal; transmitting, using a first sector base antenna for radiating to the first sector, the frequency-hopped signal from the radiating base station to said selected-remote unit; receiving the frequency-hopped signal at said selected-remote unit; recovering, from the frequency-hopped signal, the base-message data; frequency hopping converted-base-message data over a second set of frequencies, F2, assigned to a second concentric region of a second sector, thereby generating a frequency-hopped signal using the second set of frequencies, the second concentric region of the second sector being at a same range from the radiating base station as the first concentric region of the first sector from the radiating base station, the second set of frequencies having frequencies different from other sets of frequencies used in other concentric regions of the second sector, the second set of frequencies also being different from the first set of frequencies; controlling, in response to said selected-remote unit being located in the second concentric region of the second sector, the set of frequencies used by the radiating base station for communicating with said selected-remote unit; amplifying the frequency-hopped signal; transmitting, using a second sector base antenna for radiating to the second sector, the frequency-hopped signal from the radiating base station to said selected-remote unit; receiving the frequency-hopped signal at said selected-remote unit; and recovering, from the frequency-hopped signal, the base-message data.
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