Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2008-01-08
2008-01-08
Kumar, Pankaj (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
Reexamination Certificate
active
07317771
ABSTRACT:
The invention concerns a method for estimating a plurality of symbols transmitted by a first plurality of transmit antennas at a given emission time or a plurality of symbols subjected to a space-time dispersion coding prior to transmission by the first plurality of transmit antennas over a second plurality of transmission times, the method using the signals received by a third plurality of receive antennas, each symbol belonging to a modulation constellation. The method includes forming a vector representative of said received signals at a reception time or at a plurality of consecutive reception times; searching the closest neighbour of said vector among candidate vectors belonging to a lattice of points generated by a plurality of generating vectors, wherein the components of said vector are reordered according to an ordering rule prior to a search.
REFERENCES:
patent: 2002/0044611 (2002-04-01), Hassibi et al.
Chan, A. et al., “A New Reduced-Complexity Sphere Decoder For Multiple Antenna Systems,” IEEE International Conference on Communications, vol. 1, Apr. 28-May 2, 2002, pp. 460-464.
Albert M. Chan, et al. “A New Reduced-Complexity Sphere Decoder for Multiple Antenna Systems” ICC 2002, 2002 IEEE International Conference on Communications, Conference Proceedings, New York, NY, Apr. 28-May 2, 2002, vol. 1 of 5, pp. 460-464.
M. Oussama Damen, et al. “Generalised Sphere Decoder for Asymmetrical Space-Time Communication Architecture” Electronics Letters, vol. 36, No. 2, Jan. 20, 2000, pp. 166-167.
Mohamed Oussama Damen, et al. “Further Results on the Sphere Decoder” Proceedings of the 2001 IEEE International Symposium on Information Theory, ISIT 2001, Washington, WA Jun. 24-Jun. 29, 2001; IEEE Internationsal Symposium on Information Theory, New York, NY: IEEE, US, Jun. 24, 2001, p. 333.
Kumar Pankaj
Mitsubishi Denki & Kabushiki Kaisha
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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