Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2008-05-20
2008-05-20
Ha, Dac V. (Department: 2611)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S136000, C375S349000, C455S303000
Reexamination Certificate
active
07376171
ABSTRACT:
Techniques for multiple access differential M-ary coding applications that can be optionally aided by multiuser detection (MUD) are disclosed. An initial hopped feature decoding is performed to provide data estimates for each user represented in a received co-channel signal. Interference cancellation can then be performed using MUD, thereby providing an interference-cancelled signal. Data estimates remaining are then re-decoded. Iteration on the interference cancellation and re-decoding can be carried out to satisfy a particular rule of iteration, although iteration is not always necessary. The final decoded signal can then be provided to its destination.
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Edelson Geoffrey S.
Egnor Dianne E.
Mills Diane G.
BAE Systems Information and Electronic Systems Integration Inc.
Ha Dac V.
Vern Maine & Associates
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