Multiplex communications – Generalized orthogonal or special mathematical techniques – Quadrature carriers
Reexamination Certificate
2007-10-25
2010-06-29
Pham, Chi H. (Department: 2471)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Quadrature carriers
C370S208000, C370S210000, C370S335000, C375S260000, C375S295000
Reexamination Certificate
active
07746761
ABSTRACT:
Various example embodiments are disclosed herein. According to an example embodiment, an apparatus for use in a wireless transmitter may include a continuous phase modulation (CPM) sample generator configured to generate a group of constant envelope CPM modulated signal samples, a Fourier transform block configured to perform a Fourier transform on the group of constant envelope signal samples to generate an initial group of Fourier coefficients, a zero insertion block configured to generate an expanded group of Fourier coefficients by inserting one or more zeros in the initial group of Fourier coefficients, and an inverse Fourier transform block configured to perform an inverse Fourier transform on the expanded group of Fourier coefficients to generate a group of constant envelope time-domain samples and to map the constant envelope time-domain samples onto a group of orthogonal subcarriers for transmission.
REFERENCES:
patent: 6715124 (2004-03-01), Betts
patent: 2005/0073949 (2005-04-01), Hayashi
patent: 2005/0254416 (2005-11-01), Laroia et al.
patent: 2007/0195740 (2007-08-01), Bhushan et al.
Tan, J. “Constant envelop multi-carrier modulation”, Proceedings 2002 milcom, 1, (Oct. 2002), 607-611.
Tasadduq, I. A., et al., “OFDM-CPM signals”, Electronic letters , 38, (Jan. 2, 2002),80-81.
Fan, P. et al., “Blocked coded modulation for the reduction of the peak to average power ration in OFDM systems.”, IEEE trans. consum. , electron, 45 (4), (Nov. 1999),1025-1029.
Tellado, J. et al., “Peak power reduction for multicarrier transmission”, in proc. Globecom, (1998),219-224.
Wulich, D. et al., “Reduction of peak factor in orthogonal multicarrier modulation by amplitude limiting coding”, IEEE Trans. Commun. , 47 (1), (Jan. 1999),18-21.
Muller, S. H., et al., “A novel power reduction scheme for OFDM”, in proc. IEEE PIMRC , 3, (1997),1090-1094.
Li, X. et al., “M-sequences for OFDM peak-to-average power ratio reduction and error correction”, Electron. Lett., 33 (7), (Mar. 1997),554-555.
Nikookar, H. et al., “Random phase updating algorithm for OFDM transmission with low PAPR”, IEEE Trans. Broadcast., 48 (2), (Jun. 2002),123-128.
May, T. et al., “Reducing the peak-to-average power ratio in OFDM radio transmission systems, in Proc.”, VTC, (1999),2474-2478.
Cimini, L. J., et al., “Peak-to-average power reduction of an OFDM signal using partial transmit sequences, in Proc.”, IEEE ICC, (1999),511-515.
Tellado, J. et al., “Efficient algorithms for reducing PAR in multicarrier systems, in proc.”, IEEE inf. Theory Symp., (1998),191.
Jiang, T. et al., “Nonlineaar companding transform for reducing peak-to-average power ratio of OFDM signals”, IEEE Trans. Broadcast, 50 (3), (Sep. 2004),342-346.
Ren, G. et al., “A complementary clipping transform technique for the reduction of peak-to-average power ratio of OFDM system”, IEEE Trans. Consum. Electron., 49 (4), (Nov. 2003),922-926.
Slimane, S. B., “reducing the peak-to-average power ratio of OFDM signals through precoding”, IEEE Trans. on vehicular technology, 56 (2), (Mar. 2007),686-695.
Kristensen, Frederik et al., “Flexible baseband transmitter for OFDM”, 1. 1. Dep. Of Electroscience and CCCD. Box 118, Lund University. SE-221 00 Lund, Sweden, (Nov. 7, 2003),1-6.
Saltzberg, B. R., “Performance of an Efficient Parallel Data Transmission System”, IEEE Transactions on Communication Technology, 15(6), (Dec. 1967),805-811.
Falconer, D. et al., “Frequency Domain Equalization for Single-Carrier Broadband Wireless Systems”, IEEE Communications Magazine, (Apr. 2002),1-9.
Chatterjee, S. et al., “Adaptive Modulation based MC-CDMA Systems for 4G Wireless Consumer Applications”, IEEE Transactions on Consumer Electronics, 49(4), (Nov. 2003),995-1003.
Peled, A. et al., “Frequency Domain Data Transmission using Reduced Computational Complexity Algorithms”, Computer Sciences Department, (1980),964-967.
Moqvist, P. et al., “Trellis Termination in CPM”, Electronics Letters, 1940-1941.
Moqvist, P. et al., “Serially Concentrated Continuous Phase Modulation With Iterative Decoding”, IEEE Transactions on Communcations, vol. 49, No. 11, (Nov. 2001),1-15.
Huang, Fu-Hua “Thesis: Evaluation of Soft Output Decoding for Turbo Codes”, http://scholar.lib.vt.edu/theses/ available/etd-71897-15815/; Virginia Tech, (May 29, 1997).
Hokfelt, Johan et al., “Distance Spectra of Turbo Codes Using Different Trellis Termination Methods”, Dept. of Applied Electronics, Lund University Sweden, (2000),1-4.
Guinand, P. et al., “Trellis Termination for Turbo Encoders”, Communications Research Centre; Ottawa, Canada, (May 1994),389-392.
Moqvist, P. et al., “Seriall Concatenated Systems: An Iterative Decoding Approach with Application to Continuous Phase Modulation”, Department of Computer Engineering, Chalmaers University of Technology; Sweden, (1999),1-69.
Divsalar, D. et al., “Turbo Codes for PCS Applications”, Jet Propulsion Laboratory, California Institute of Technology; California, (1996),1-6.
Brake Hughes Bellermann LLP
Hom Shick
Nokia Siemens Networks Oy
Pham Chi H.
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