12-chip coded spread spectrum modulation for direct conversion r

Details 12-chip coded spread spectrum modulation for direct conversion r 12-chip coded spread spectrum modulation for direct conversion r

1995-12-06

1999-04-06

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

455462, 455465, H04B 1707, H04M 119, H04M 1100

Patent

active

058927921

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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"Rockwell enters the 900 MHz digital cordless telephony IC market with 900 MHz Spread Spectrum product family; new product family provides a complete system solution for Spread Spectrum telephones," Business Wire, pp. 10301019, Oct. 1995.

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