Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2008-03-11
2008-03-11
Pham, Chi (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C375S283000
Reexamination Certificate
active
10673958
ABSTRACT:
Systems and methods for optimally receiving differential encoded OFDM signals via multiple antennas. These techniques may exploit spatial diversity without knowledge of channel characteristics. Further systems and methods are provided for exploiting frequency diversity within an OFDM burst where differentially encoded symbols are repeated to assure optimal performance. The output of differential decoding systems may also be used to provide soft decision values for individual bits of multibit symbols to facilitate use of bitwise channel decoding systems.
REFERENCES:
patent: 5282222 (1994-01-01), Fattouche et al.
patent: 5528581 (1996-06-01), De Bot
patent: 5550812 (1996-08-01), Philips
patent: 5761190 (1998-06-01), Yamauchi et al.
patent: 5838799 (1998-11-01), Cioffi et al.
patent: 5914931 (1999-06-01), Kang et al.
patent: 5949793 (1999-09-01), Bossard et al.
patent: 5959965 (1999-09-01), Ohkubo et al.
patent: 6327314 (2001-12-01), Cimini, Jr. et al.
patent: 6421400 (2002-07-01), Rhee et al.
patent: 6499128 (2002-12-01), Gerlach et al.
patent: 7103107 (2006-09-01), Matsunaga et al.
Jones et al., “Improved System for Interference Cancellation”, Mar. 1999, U.S. Appl. No. 09/282,589.
Rohling et al., “Differential Amplitude Phase Shift Key (DAPSK)—A New Modulation Method for DTVB”, Sep. 14-18, 1995, IEEE International Broadcasting Convention, pp. 102-108.
John G. Proakis, “Digital Communications”, 3rdEdition, Ch. 5: Optimum Receivers for the Additive White Gaussian Noise Channel, pp. 274-278.
Gardner James M.
Jones IV Vincent K.
Boakye Alexander O.
Cisco Technology Inc.
Inventek
Pham Chi
Rosenfeld Dov
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