Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-07-18
2006-07-18
Urban, Edward F. (Department: 2684)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S063400, C455S065000, C455S561000
Reexamination Certificate
active
07079870
ABSTRACT:
In a beamforming communication device, transmit weight vectors are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. The initial transmit weights are computed from signals transmitted by a second communication device and received at a plurality of antennas of the first communication device. The transmit weight processing includes normalizing a transmit weight vector with respect to an element of the transmit weight vector associated with one of the plurality of antennas. The processed transmit weight vectors are then applied to a transmit signal to produce a plurality of transmit signals to be simultaneously transmitted from corresponding ones of the plurality of antennas of the first communication device. These group delay compensation techniques may be extended to a vector beamforming system in which a plurality of eigenmodes is transmitted between the two devices.
REFERENCES:
patent: 4599734 (1986-07-01), Yamamoto
patent: 4639914 (1987-01-01), Winters
patent: 5274844 (1993-12-01), Harrison et al.
patent: 5394435 (1995-02-01), Weerackody
patent: 5437055 (1995-07-01), Wheatley, III
patent: 5491723 (1996-02-01), Diepstraten
patent: 5507035 (1996-04-01), Bantz et al.
patent: 5577265 (1996-11-01), Wheatley, III
patent: 5610617 (1997-03-01), Gans et al.
patent: 5982327 (1999-11-01), Vook et al.
patent: 6008760 (1999-12-01), Shattil
patent: 6037898 (2000-03-01), Parish et al.
patent: 6038272 (2000-03-01), Golden
patent: 6044120 (2000-03-01), Bar-David et al.
patent: 6058105 (2000-05-01), Hochwald et al.
patent: 6097771 (2000-08-01), Foschini
patent: 6122260 (2000-09-01), Liu et al.
patent: 6124824 (2000-09-01), Xu et al.
patent: 6141393 (2000-10-01), Thomas et al.
patent: 6144711 (2000-11-01), Raleigh et al.
patent: 6147985 (2000-11-01), Bar-David et al.
patent: 6157340 (2000-12-01), Xu et al.
patent: 6177906 (2001-01-01), Petrus
patent: 6195045 (2001-02-01), Xu et al.
patent: 6211671 (2001-04-01), Shattil
patent: 6252548 (2001-06-01), Jeon
patent: 6298092 (2001-10-01), Heath, Jr.
patent: 6307882 (2001-10-01), Marzetta
patent: 6317466 (2001-11-01), Foschini et al.
patent: 6327310 (2001-12-01), Hochwald et al.
patent: 6331837 (2001-12-01), Shattil
patent: 6349219 (2002-02-01), Hochwald et al.
patent: 6351499 (2002-02-01), Paulraj et al.
patent: 6362781 (2002-03-01), Thomas et al.
patent: 6369757 (2002-04-01), Song et al.
patent: 6369758 (2002-04-01), Zhang
patent: 6370182 (2002-04-01), Bierly et al.
patent: 6377631 (2002-04-01), Raleigh
patent: 6377636 (2002-04-01), Paulraj et al.
patent: 6377819 (2002-04-01), Gesbert et al.
patent: 6400699 (2002-06-01), Airy et al.
patent: 6400780 (2002-06-01), Rashid-Farrokhi et al.
patent: 6442214 (2002-08-01), Boleskei et al.
patent: 6462709 (2002-10-01), Choi
patent: 6463295 (2002-10-01), Yun
patent: 6473467 (2002-10-01), Wallace et al.
patent: 6584161 (2003-06-01), Hottinen et al.
patent: 6636568 (2003-10-01), Kadous
patent: 6687492 (2004-02-01), Sugar et al.
patent: 2001/0012764 (2001-08-01), Edwards et al.
patent: 2001/0015994 (2001-08-01), Nam
patent: 2001/0046255 (2001-11-01), Shattil
patent: 2001/0053143 (2001-12-01), Li et al.
patent: 2002/0001316 (2002-01-01), Hornsby et al.
patent: 2002/0024975 (2002-02-01), Hendler
patent: 2002/0034191 (2002-03-01), Shattil
patent: 2002/0039884 (2002-04-01), Raynes et al.
patent: 2002/0064246 (2002-05-01), Kelkar et al.
patent: 2002/0067309 (2002-06-01), Baker et al.
patent: 2002/0072392 (2002-06-01), Awater et al.
patent: 2002/0085643 (2002-07-01), Kitchener et al.
patent: 2002/0102950 (2002-08-01), Gore et al.
patent: 2002/0111142 (2002-08-01), Klimovitch
patent: 2002/0118781 (2002-08-01), Thomas et al.
patent: 2002/0122383 (2002-09-01), Wu et al.
patent: 2002/0122501 (2002-09-01), Awater et al.
patent: 2002/0127978 (2002-09-01), Khatri
patent: 2002/0136170 (2002-09-01), Struhsaker
patent: 2002/0141355 (2002-10-01), Struhsaker et al.
patent: 2002/0155818 (2002-10-01), Boros et al.
patent: 2002/0158801 (2002-10-01), Crilly, Jr. et al.
patent: 2002/0159537 (2002-10-01), Crilly, Jr.
patent: 2002/0172269 (2002-11-01), Xu
patent: 2002/0196842 (2002-12-01), Onggosanusi et al.
patent: 2003/0002450 (2003-01-01), Jalali et al.
patent: 2003/0032423 (2003-02-01), Boros et al.
patent: 2003/0108117 (2003-06-01), Ketchum et al.
patent: 2003/0125090 (2003-07-01), Zeira
patent: 2003/0139194 (2003-07-01), Onggosanusi et al.
patent: 2004/0072546 (2004-04-01), Sugar et al.
patent: 2005/0094598 (2005-05-01), Medvedev et al.
patent: WO 02/03568 (2002-01-01), None
patent: WO 01/45300 (2002-06-01), None
Iserte, Antonio Pascual et al., “Pre-and Post-Beamforming in MIMO Channels Applied to HIPERLAN/2 and OFDM,” IST Summit 2001 (IST Mobile Communications Summit), Sep. 2001.
Iserte, Antonio Pascual et al., “Joint Beamforming Strategies in OFDM-MIMO Systems,” ICASSP 2002 (IEEE International Conference on Acoustics, Speech and Signal Processing), May 2002.
Lee, Dennis et al., “Antenna Diversity for an OFDM System in a Fading Channel,” Proceeding of IEEE MILCOM 1999, Nov. 1999, pp. 1104-1109.
Jakes, William C., “Microwave Mobile Communications,” Copyright 1974, pp. 313-320 and 489-498.
Yeh, Y.S., “An Analysis of Adaptive Retransmission Arrays in a Fading Environment,” The Bell System Technical Journal, Oct. 1970, pp. 1811-1825.
Morgan, Samuel P., “Interaction of Adaptive Antenna Arrays in an Arbitrary Environment,” The Bell System Technical Journal, Jan. 1965, pp. 23-47.
Aziz, Abdul M.K. et al., “Indoor Throughput and Range Improvements using Standard Compliant AP Antenna Diversity in IEEE 802.11a and ETSI HIPERLAN/2,” Vehicular Technology Conference, 2002, VTC 2001, Oct. 7-11, 2001, IEEE VTS 54th, vol. 4, pp. 2294-2298.
Iserte, Antonio Pascual et al., “Iterative Algorithm for the Estimation of Distributed Sources Localization Parameters,” SSP 2001 (11thIEEE Workshop on Statistical Signal Processing), Aug. 2001.
Vaidyanathan et al., “The Role of Lossless Systems in Modern Digital Signal Processing: A Tutorial,” IEEE Transactions on Education, vol. 32, Aug. 1989, pp. 181-197.
Raleigh et al., “Spatio-Temporal Coding for Wireless Communication,” IEEE Transactions on Communications, vol. 46., No. 3, Mar. 1998, pp. 357-366.
Jungnickel et al., “Performance of a MIMO System with Overlay Pilots,” IEEE GlobeCom 2001, pp. 594-598.
BLAST High-Level Overview, Lucent Technologies, Jul. 18, 2000.
Golden et al., “Detection Algorithm and Initial Laboratory Results Using V-BLAST Space-Time Communication Architecture,” Electronic Letters, Jan. 7, 1999, vol. 35, No. 1.
Rich-Scattering Wireless Channel, Bell Laboratories, Lucent Technologies, Proc. Int'l Symposium on Advanced Radio Technologies, Builder, CO, Sep. 10, 1998.
Wolniansky et al., “V-BLAST: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel,” Proc. ISSSE-98, Pisa, Italy, Sep. 29, 1998.
Chizhik et al., “Keyholes, Correlations, and Capacities of Multielement Transmit and Receiver Atennas,” IEEE Transactions on Wireless Communications, vol. 1, No. 2, Apr. 2002, pp. 361-368.
Junqiang et al., “Spatial Multiuser Access with MIMO Smart Antennas for OFDM Systems,” IEEE VTC '2001, Sep. 2001, pp. 1553-1557.
Stridh et al., “MIMO Channel Capacity on a Measured Indoor Radio Channel at 5.8 GHz,” Proc. Of the Asilomar Conf. on Signals, Systems & Computers, vol. 1, Oct. 2000, pp. 733-737.
Jungnickel et al., “A MIMO WLAN Based on Linear Channel Inversion,” IEEE Seminar-MIMO Communication Systems from Concept to Implementation, Dec. 2001, pp. 20/1-20/6.
Stridh et al., “Spatial Characterization of Indoor Radio Channel Measurements at 5 GHz,” SAM '2000, Mar. 2000, pp. 58-62.
Irner, Ralf et al., “MISO Concepts for Frequency-Selective Channels,” 2002 International Zurich Seminar on Broadband Communications Access, Feb. 19-21, 2002.
Choi,
Dean Raymond S.
IPR Licensing Inc.
Urban Edward F.
Volpe and Koenig P.C.
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