Multibit spread spectrum signaling

Details Multibit spread spectrum signaling Multibit spread spectrum signaling

2006-09-05

2006-09-05

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S343000, C375S150000, C370S335000

Reexamination Certificate

active

07103089

ABSTRACT:
A method of transmitting and receiving a spread spectrum signal, wherein a product of a lower bit rate signal and a second PN-code equals the bit rate of a higher bit rate signal, and wherein a first PN-code sequence is used to spread the product or the higher bit rate signal to a predetermined output chip rate signal which is transmitted. At a receiver, the spread spectrum signal is received and demodulated and in a first operation the demodulated signal is correlated with the first PN-code sequence and in a second operation the output from the first mentioned correlating step is correlated with the second PN-code sequence. The demodulated signal is treated as either a higher bit rate signal or a lower bit rate signal based on the first and second correlations operations.

REFERENCES:
patent: 5706428 (1998-01-01), Boer et al.
patent: WO 9721294 (1996-12-01), None
patent: WO 9903225 (1998-07-01), None

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