12-chip coded spread spectrum modulation for direct conversion radio architecture in a digital cordless telephone
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United States of America Patent
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Apr 6, 1999
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N/A
app pub date -
Dec 6, 1995
filing date -
Dec 6, 1995
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Abstract
A cordless direct sequence spread spectrum telephone using a direct conversion radio architecture wherein the code sequence used for spreading and despreading is an even code sequence to prevent addition of low frequency noise in the down-conversion process, the preferred even code being a 12-chip code and, more particularly, being an even 12-chip code that is generated by adding one bit to an inverted, shifted, and/or reversed 11-chip Barker sequence.
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