US 7,321,636 B2
Communication device with smart antenna using a quality-indication signal
Haim Harel, New York, N.Y. (US); Yingxue Li, Emmaus, Pa. (US); and Alexander Segalovitz, Kefar Sava (Israel)
Assigned to Magnolia Broadband Inc., Bedminster, N.J. (US)
Filed on May 09, 2002, as Appl. No. 10/141,342.
Claims priority of provisional application 60/294290, filed on May 31, 2001.
Prior Publication US 2003/0002594 A1, Jan. 02, 2003
Int. Cl. H04L 27/00 (2006.01); H04L 1/02 (2006.01); H04B 1/02 (2006.01); H04B 7/00 (2006.01)
U.S. Cl. 375—299  [375/267; 455/101; 455/103; 455/69] 75 Claims
OG exemplary drawing
 
1. A method for a first communication device to communicate with a second communication device over a communication link, the first communication device having a plurality of antenna elements, the method comprising:
receiving a quality-indication signal from the second communication device, the communication link configured according to at least one Code-Division-Multiple-Access (CDMA) protocol from the group of CDMA-IS-95 A/B, CDMA 2000 1X/RTT, CDMA 2000 3X, CDMA EV-DO, WCDMA, 3G Universal Mobile Telecommunications System (UMTS) and 4G UMTS, the quality-indication signal being a power-control bit according to the CDMA protocol, the power-control bit having a value of one or zero for each time period from a plurality of time periods, the power-control bit being generated by the second communication device and indicating an adjustment to a power of a transmitted signal at the first communication device so that a predetermined threshold requirement for the second communication device can be satisfied;
calculating a complex weighting based on the quality-indication signal, the complex weighting being associated with a total power of the transmitted signal and at least one from a phase rotation and a power ratio associated with each antenna element from the plurality of antenna elements, the complex weighting associated with the total power of the transmitted signal and the phase rotation associated with each antenna element from the plurality of antenna elements, the calculating of the complex weighting being performed for each antenna element from the plurality of antenna elements and wherein said calculating includes:
adjusting the total power of the transmitted signal while maintaining the phase rotation associated with an antenna element from the plurality of antenna elements until a steady state is obtained at a first time;
adjusting the phase rotation associated with each antenna element from the plurality of antenna elements while maintaining the total power of the transmitted signal to produce an optimal phase rotation for each antenna element; and
adjusting the total power of the transmitted signal while maintaining the optimal phase rotation for each antenna element until a second steady state is obtained at a second time subsequent to the first time;
modifying a pre-transmission signal based on the complex weighting to produce a plurality of modified pre-transmission signals, each modified pre-transmission signal from the plurality modified pre-transmission signals being uniquely associated with an antenna element from a plurality antenna elements; and
sending the plurality of modified pre-transmission signals from the plurality of antenna elements to produce the effective combined transmitted signal.