Combined OFDM and wavelet multi-carrier transceiver

Details Combined OFDM and wavelet multi-carrier transceiver Combined OFDM and wavelet multi-carrier transceiver

2011-03-01

2011-03-01

Ngo, Ricky (Department: 2464)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

C370S208000, C375S260000

Reexamination Certificate

active

07898936

ABSTRACT:
A multicarrier transmitter and receiver uses a first inverse fast Fourier transformer for performing an Inverse Fast Fourier Transform (IFFT) on a parallel input data signal, an imaginary component filter for filtering out the imaginary component of an output signal of the first transformer and a real component filter for filtering out the real component of the output signal of the first. The multicarrier transmitter and receiver also uses a first polyphase filter having real coefficients. The first filter accepts output data from the imaginary component filter. The multicarrier transmitter and receiver also uses a second polyphase filter having real coefficients which are selected as the real coefficients of the first filter with the sign of each odd-numbered real coefficient inverted. The second filter accepts output data from said real component filter. A combined OFDM and wavelet multi-carrier transceiver is proposed sharing an IFFT block.

REFERENCES:
patent: 6704438 (2004-03-01), Alexandru
patent: 2004/0184400 (2004-09-01), Koga et al.
Yongzhe et al (A combined DMT/DWMT system for DSL application, Signal processing 80(2000) 185-195, Aug. 19, 1999).
Michael et al. (DMT Systems, DWMT systems and Digital Filter Banks, 0-7803-1825-094 IEEE, 1994) teaches DMT Systems, DWMT systems and Digital Filter Banks.
Yongzhe Aug. 19, 1999, DMT/DWMT system for DSL application, Signal processing 80(2000) 185-195.
Yongzhe Xie et al.: A Combined DMT/SWMT System for DSL Application; Signal Processing, Amsterdam, NL, vol. 80, No. 1, Jan. 2000, pp. 185-195.
Andrea M. Tonello et al.: An Efficient Implementation of a Wavelet, Based Filtered Multitone Modulation Scheme, Signal Processing and Information Technology, 2004, Proceedings of the Fourth IEEE International Symposium on Rome, Italy, Dec. 18-21, 2004, Piscataway, NJ, USA, IEEE, Dec. 18, 2004, pp. 225-228.
Michael. A. Tzannes et al.: DMT Systems, DWMT Systems and Digital Filter Banks, Communications, 1994. ICC '94, Supercomm/ICC '94, Conference Record, ‘Serving Humanity Through Communications.’ IEEE International Conference on New Orleans, LA, USA May 1-5, 1994, New York, NY, USA, IEEE May 1, 1994, pp. 311-315.
International Search Report dated Oct. 5, 2006.

Affiliated with

Also associated with

Rating

Combined OFDM and wavelet multi-carrier transceiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined OFDM and wavelet multi-carrier transceiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined OFDM and wavelet multi-carrier transceiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2740745