CDMA communication system
First Claim
1. A CDMA communication system using spreading codes, said system having a plurality of mobile stations and at least one base station, said mobile stations and said base station provided with respective receiving sections each of which has a path diversity function for reducing multipath fading, said base station comprising:
- an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect; and
a plurality of delay means coupled with said respective antenna elements, for applying time delays to signals which pass through said respective antenna elements, said time delay being different from each other by a one symbol period of the spreading codes or more.
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Accused Products
Abstract
A CDMA communication system using a spreading code has a plurality of mobile stations and at least one base station. The mobile stations and the base station are provided with respective receiving sections, each of which has a path diversity function for reducing multipath fading. The base station includes an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect. A plurality of delay devices are coupled with the respective antenna elements, for applying time delays to signals which pass through the respective antenna elements. The time delay are different from each other by a one symbol period of the spreading code or more.
132 Citations
18 Claims
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1. A CDMA communication system using spreading codes, said system having a plurality of mobile stations and at least one base station, said mobile stations and said base station provided with respective receiving sections each of which has a path diversity function for reducing multipath fading, said base station comprising:
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an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect; and a plurality of delay means coupled with said respective antenna elements, for applying time delays to signals which pass through said respective antenna elements, said time delay being different from each other by a one symbol period of the spreading codes or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A base station for a CDMA communication system using spreading codes, said system having a plurality of mobile stations, said base station provided with a receiving section which has a path diversity function for reducing multipath fading, comprising:
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an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect; and a plurality of delay means coupled with said respective antenna elements, for applying time delays to signals which pass through said respective antenna elements, said time delay being different from each other by a one symbol period of the spreading codes or more. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An antenna section in a base station of a CDMA communication system using spreading codes, said system having a plurality of mobile stations, said mobile stations and said base station provided with respective receiving sections each of which has a path diversity function for reducing multipath fading, comprising:
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an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect; and a plurality of delay means coupled with said respective antenna elements, for applying time delays to signals which pass through said respective antenna elements, said time delay being different from each other by a one symbol period of the spreading codes or more. - View Dependent Claims (18)
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Specification