Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2007-12-11
2007-12-11
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S341000, C375S229000, C329S304000, C332S103000
Reexamination Certificate
active
10772962
ABSTRACT:
Methods, apparatus and systems for implementing an algorithm for N-symbol noncoherent processing of M-ary DPSK signals in a pilotless, wireless system is provided. The algorithm is carried out with (N−1) recurrent steps (iterations) plus a decision step. Each iterative step includes simple trigonometrical transformation of quadrature components of the current symbol and summation of the transforms with results of the previous step. A final N-symbol decision regarding the current transmitted symbol corresponds to the vector of maximum length, calculated after the (N−1)-th step of the iterative procedure. The general algorithm is optionally implemented with one or more intersymbol processors, one or more memory blocks for saving results of the intersymbol processors, and a decision block. In addition, shift registers for quadrature components of the received signal may be utilized.
REFERENCES:
patent: 5610949 (1997-03-01), Petranovich
patent: 6345076 (2002-02-01), Petersen et al.
patent: 2005/0008101 (2005-01-01), Kazi et al.
patent: 2005/0111590 (2005-05-01), Fang et al.
Digital Communications; Fourth Edition; by John G. Proakis; McGraw Hill, 2000.
“Multiple-Symbol Differential Detection of MPSK”; by Dariush Divsalar and Marvin K. Simon, 1999 IEEE.
Goldstein Yuri
Okunev Yuri
Fan Chieh M.
Gordon & Jacobson P.C.
PC-TEL, Inc.
Zheng Eva
LandOfFree
Method and apparatus for noncoherent signal processing in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for noncoherent signal processing in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for noncoherent signal processing in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3849162