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Title:
ENHANCED METRICS FOR DEMODULATION AND SOFT INFORMATION GENERATION IN THE PRESENCE OF A NON-CONSTANT ENVELOPE MODULATED INTERFERER
Document Type and Number:
WIPO Patent Application WO/2013/144886
Kind Code:
A3
Abstract:
Embodiments of a receiver are disclosed that utilize enhanced, metrics for demodulation and soft bit information generation in the presence of a non-constant envelope modulated interfering signal. In general, the receiver includes a downc-onverter and a demodulator. The downconverter receives a radio frequency signal comprising a desired signal, noise, and a non-constant envelope modulated interfering signal, and do wneon verts the radio frequency signal to provide a downconveried signal The demodulator demodulates the do wncon verted signal based on a demodulation meiric that models the non-constant envelope modulated interfering signal as a stationary non-Gaussian random process with a probability distribution derived from a modulation constellation of a. modulation used for the non-constant envelope modulated interfering signal. In one embodiment, the demodulator outputs demodulated symbols, in another embodiment, the demodulator outputs soft bit information.

Inventors:
HUI DENNIS (US)
KHAYRALLAH ALI (US)
Application Number:
PCT/IB2013/052471
Publication Date:
November 28, 2013
Filing Date:
March 27, 2013
Export Citation:
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Assignee:
ERICSSON TELEFON AB L M (SE)
International Classes:
H04L27/26; H04L25/06; H04L27/38
Domestic Patent References:
WO2000016528A12000-03-23
Foreign References:
US20040083082A12004-04-29
Other References:
PETROVIC D ET AL: "Intercarrier interference due to phase noise in OFDM - estimation and suppression", 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE. VTC2004-FALL (IEEE CAT. NO.04CH37575) IEEE PISCATAWAY, NJ, USA, IEEE, vol. 3, 26 September 2004 (2004-09-26), pages 2191 - 2195, XP010787028, ISBN: 978-0-7803-8521-4, DOI: 10.1109/VETECF.2004.1400429
PEDRO PEDROSA ET AL: "Iterative frequency domain equalization for DQPSK signals", COMMUNICATIONS AND INFORMATION TECHNOLOGIES, 2007. ISCIT '07. INT ERNATIONAL SYMPOSIUM ON, IEEE, PI, 1 October 2007 (2007-10-01), pages 808 - 813, XP031166572, ISBN: 978-1-4244-0976-1, DOI: 10.1109/ISCIT.2007.4392127
Attorney, Agent or Firm:
CASON, Todd A. et al. (MS EVR 1-C-11Plano, Texas, US)
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