Pulse or digital communications – Testing – With indicator
Reexamination Certificate
2011-08-09
2011-08-09
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Testing
With indicator
C375S347000
Reexamination Certificate
active
07995647
ABSTRACT:
A measurement indicator, “transfer efficiency,” is provided for evaluating conditions of propagation paths of wireless communication systems having a plurality of transmitting and receiving antennas. Transfer functions of signal paths are calculated from data of received signals that are obtained with receiving antennas by receiving OFDM signals transmitted by transmitting antennas. A demodulation matrix is calculated for demodulating a transmitting vector from a receiving vector concerning a desired subcarrier of the received signals. A noise amplification factor is calculated as a square root of a sum of second powers of components of the demodulation matrix of the receiving antennas concerning the desired transmitting antenna. The noise amplification factor or the inverse is displayed as a value or as a graph that has an axis concerning the subcarrier and an axis concerning the noise amplification factor or the inverse.
REFERENCES:
patent: 2003/0236080 (2003-12-01), Kadous et al.
patent: 2007/0070956 (2007-03-01), Seki
patent: 2009/0092198 (2009-04-01), Motoyoshi et al.
Kudo R et al., “Novel downlink beamforming method using selective STBC with common eigenvectors for MIMO-OFDM systems,” IEICE Transactions on Communications, Communications Society, Tokyo, JP, vol. E89-B, No. 8, Aug. 1, 2006, pp. 2170-2179, XP001246275, ISSN: 0916-8516.
Fan Liang, “The challenges of testing MIMO,” RF Design (online), Nov. 1, 2005, XP002514687, http://web.archive.org/web/20060627035555/http://rfdesign.com/mag/511RFDF1.pdf.
Jungnickel V. et al., “Link adaptation in a multi-antenna system,” VTC 2003-Spring, The 57th IEEE semi-annual vehicular technology conference proceedings, Jeju, Korea, Apr. 22-25, 2003, New York, NY, IEEE, US, vol. 2, Apr. 22, 2003, pp. 862-866, XP010862553, ISBN: 978-0-7803-7757-8.
Bocure Tesfaldet
Nelson Michael A.
Tektronix Inc.
LandOfFree
Apparatus and method for evaluating propagation path conditions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for evaluating propagation path conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for evaluating propagation path conditions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2723149