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Spread spectrum technology for low power PCS applications. (personal communication services)(includes related article)
- Article from:
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Microwave Journal
- Article date:
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October 1, 1995
- Author:
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;
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Copyright informationCOPYRIGHT 1995 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Recent advances in integrated circuits (IC) have reduced the cost of spread spectrum designs and increased the total spreading possible in low power, low cost radio frequency (RF) data moderns. The latest IC designs allow up to 63 million chips per second, pseudorandom (PN) code lengths selected from 10 to 2047 and data rates up to 2 Mbps. PN codes are bit sequences that are unrelated to each other. This class of spread spectrum operation is now supported by ICs costing less than 20 dollars in large volumes. Therefore, a low cost direct sequence system can spread a signal and easily fill 100 MHz of bandwidth. The reasons to increase the spreading and the advantages of spread ...
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