Bandjamming multi-channel DSSS transmitter and method therefor

Details Bandjamming multi-channel DSSS transmitter and method therefor Bandjamming multi-channel DSSS transmitter and method therefor

2011-07-12

2011-07-12

Payne, David C (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S140000

Reexamination Certificate

active

07978749

ABSTRACT:
A direct sequence spread spectrum (DSSS) transmitter (12) is configured to form “N” multiple excess-bandwidth channels (44) in an allocated bandwidth (54), where N is an integer. Each excess-bandwidth channel (44) includes a lower rolloff band (40), a minimum-bandwidth channel (38), and an upper rolloff band (42). The N excess-bandwidth channels (44) are placed in the allocated bandwidth (54) so that two of the rolloff bands (40, 42) reside within allocated bandwidth54and outside all of minimum-bandwidth channels38and so that N−2 of the rolloff bands (40, 42) predominately reside within adjacent minimum-bandwidth channels (38). The excess-bandwidth channels (44) substantially conform to EV-DO standards, and four of the excess-bandwidth channels (44) are supported for each 5 MHz of allocated bandwidth (54).

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