Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-01-17
2006-01-17
Vanderpuye, Kenneth (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S142000, C370S342000
Reexamination Certificate
active
06987799
ABSTRACT:
A Direct Sequence Spread Spectrum (DSSS) receiver system (100) combines and orders the soft symbols from associated information channels. The system permits a QPSK channel to be demodulated as a pair of BPSK channels, and the soft symbols of the demodulated BPSK channels to be multiplexed into a single information channel. The receiver system (100) includes a plurality of demodulating fingers (102–106). Each demodulating finger accepts modulation parameters and a sample stream, while supplying soft symbols with indexing information so that information channels can be subsequently multiplexed into a single information channel. A method for ordering the soft symbols of associated information channels in a DSSS system is also provided.
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Julian Craig M.
McDonough John G.
Brady III Wade James
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Vanderpuye Kenneth
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