Pulse or digital communications – Transceivers – Loopback mode
Reexamination Certificate
2006-11-04
2010-06-08
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Transceivers
Loopback mode
C375S224000, C375S226000, C455S073000, C379S003000
Reexamination Certificate
active
07733949
ABSTRACT:
A wireless communications system is provided with reduced sideband noise and carrier leakage. In the system, at least one transmitter modulates at least one input signal with a first carrier to generate a modulated output signal, and at least one receiver receives the modulated output signal and demodulates the same with a second carrier to generate at least one demodulated output signal. The first and second carriers are at different frequencies, such that the sideband noise and carrier leakage generated by different sources can be distinguished.
REFERENCES:
patent: 2003/0171110 (2003-09-01), Shi et al.
patent: 2003/0206603 (2003-11-01), Husted
patent: 2006/0034356 (2006-02-01), Fechtel
International Preliminary Report on Patentability dated Jun. 11, 2008 cited in PCT/US2006/044728.
Bednekoff George
Grabner John
Hedayat Ahmadreza
Jin Hang
Johnson Mitch
Cisco Technology Inc.
Liu Shuwang
Perez James M
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