Signal detection using sphere decoding technique

Pulse or digital communications – Receivers – Angle modulation

Reexamination Certificate

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Reexamination Certificate

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07443928

ABSTRACT:
Method and apparatus for detecting a signal are disclosed, wherein first set of symbols represents a signal received in a receiver. A second set of symbols is estimated, representing the signal transmitted at a transmitter using a sphere decoding technique. The estimation may employ at least two modulation schemes. Reliability information relating to bits forming a symbol may be determined for at least one symbol of the second set. Furthermore, reliability information relating to the signal may be taken into account in estimating at least one symbol of the second set.

REFERENCES:
patent: 2003/0076890 (2003-04-01), Hochwald et al.
patent: 1 363 405 (2003-11-01), None
Baldur Steingrimsson, et al., “Quasi-ML Detectors with Soft Output and Low Complexity for PSK Modulated MIMO Channels”, IEEE, Signal Processing Advances in Wireless Communications, Jun. 15-18, 2003, pp. 427-431.
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IEEE, 2000, Electronics Letters Online No. 2000191, DOI: 10.1049/el:20000191, Jan. 20, 2000, vol. 36, No. 2, pp. 166-167.
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Lattice Code Decoder for Space-Time Codes, Oussama Damen, Ammar Chkeif, and Jean-Claude Belfiore, 1089-7798/00, IEEE, 2000, pp. 161-163.
Achieving Near-Capacity on a Multiple-Antenna Channel, Bertrand M. Hochwald and Stephan ten Brink, IEEE Transacctions on Communications, vol. 51, No. 3, Mar. 2003, 00090-6778/03, IEEE 2003, pp. 389-399.
Damen, M. O. et al., “On Maximum-Likelihood Detection and the Search for the Closest Lattice Point”, IEEE, Transactions on Information Theory, vol. 49, No. 10, Oct. 2003, pp. 2389-2402.
Steingrimsson, B. et al., “Quasi-ML Detectors with Soft Output and Low Complexity for PSK Modulated MIMO Channels”, IEEE, Workshop on Signal Processing Advances in Wireless Communications, SPAWC, Jun. 15-18, 2003, pp. 427-431.

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