Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1996-04-19
2000-11-21
Nguyen, Chau T.
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
455561, 370337, H04B 7212, H04B 708, H04Q 720
Patent
active
061513105
ABSTRACT:
A time division multiple access base station communicates with a plurality of mobile stations in a cellular communications system using a plurality of time division multiple access (TDMA) time slots. The base station includes an antenna, a modulator, and a radio frequency switch. The antenna includes an array of transmit antenna elements. The modulator generates a first cellular radio signal for transmission during a first time division multiple access (TDMA) time slot, as well as second and third cellular radio signals for simultaneous transmission during a second time division multiple access (TDMA) time slot. In addition, the second and third cellular radio signals are generated on different frequencies. The radio frequency switch couples the first cellular radio signal to a first plurality of the transmit antenna elements during the first time division multiple access (TDMA) time slot, while coupling the second and third cellular radio signals to respective second and third pluralities of the transmit antenna elements during the second time division multiple access (TDMA) time slot.
REFERENCES:
patent: 2992427 (1961-07-01), Franco
patent: 3835392 (1974-09-01), Mahner et al.
patent: 4072956 (1978-02-01), Provencher
patent: 4101836 (1978-07-01), Craig et al.
patent: 4128740 (1978-12-01), Graziano
patent: 4204093 (1980-05-01), Yeh
patent: 4630316 (1986-12-01), Vaughan
patent: 4724441 (1988-02-01), Fithian et al.
patent: 4814773 (1989-03-01), Wechsberg et al.
patent: 4823136 (1989-04-01), Nathanson et al.
patent: 4849990 (1989-07-01), Ikegami et al.
patent: 5043738 (1991-08-01), Shapiro et al.
patent: 5166693 (1992-11-01), Nishikawa et al.
patent: 5187807 (1993-02-01), Alard et al.
patent: 5191598 (1993-03-01), Backstrom et al.
patent: 5200759 (1993-04-01), McGinnis
patent: 5241690 (1993-08-01), Larsson et al.
patent: 5276452 (1994-01-01), Schuss et al.
patent: 5280631 (1994-01-01), Nakahi et al.
patent: 5299198 (1994-03-01), Kay et al.
patent: 5301188 (1994-04-01), Kotzin et al.
patent: 5321850 (1994-06-01), Backstrom et al.
patent: 5339086 (1994-08-01), DeLuca et al.
patent: 5369681 (1994-11-01), Boudreau et al.
patent: 5388100 (1995-02-01), Ohtsuka
patent: 5432780 (1995-07-01), Smith et al.
patent: 5485631 (1996-01-01), Bruckert
patent: 5499395 (1996-03-01), Doi et al.
patent: 5511110 (1996-04-01), Drucker
patent: 5513183 (1996-04-01), Kay et al.
patent: 5515378 (1996-05-01), Roy, III et al.
patent: 5528581 (1996-06-01), De Bot
patent: 5557603 (1996-09-01), Barlett et al.
patent: 5563610 (1996-10-01), Reudink
patent: 5565873 (1996-10-01), Dean
patent: 5579306 (1996-11-01), Dent
patent: 5608722 (1997-03-01), Miller
patent: 5621752 (1997-04-01), Antonio et al.
patent: 5724666 (1998-03-01), Dent
Wayne Tomasi, Electronic Communications Systems, Prentice Hall, In,c, and pp. 356-359, 1994.
Swales, et al., A Spectrum Efficient Cellular Base-Station Antenna Architecture, Personal and Mobile Radio Communications Conference Coventry, pp. 272-279 (1991).
Lee, et al., Polarization Diversity System for Mobile Radio, IEEE Transactions on Communications, vol. COM-20, No. 5, pp. 912-923 (Oct. 1972).
Vaughan, et al., Antenna Diversity for Mobile Communications, Nordic Seminar on Digital Land Mobile Radiocommunication, pp. 87-96 (Finland, 1985).
International Search Report, PCT/US 97/06492, Jul. 25, 1997.
S.P. Stapleton et al., A Cellular Base Station Phased Array Antenna System, IEEE, 1993, pp. 93-96.
Carlo Caini et al., A Spectrum-and Power-Efficient EHF Mobile Satellite System to be Integrated with Terrestrial Cellular Systems, IEEE Journal On Selected Areas In Communications, vol. 10, No. 8, Oct. 1992, pp. 1315-1325.
Jean-Francois Lemieux et al., Experimental Evaluation of Space/Frequency/Polarization Diversity in the Indoor Wireless Channel, IEEE Transactions On Vehicular Technology, vol. 40, No. 3, Aug. 1991, pp. 569-574.
John L. Everett, Potential developments in hand-held satellite communication terminals, European Satellite Communications 89: Blenheim Online Publications, 1989, pp. 25-34.
S.A. Bergmann et al., Polarisation Diversity In Portable Communications Environment, Electronics Letters, vol. 22, No. 11, May 22, 1986, pp. 609-610.
Donald C. Cox et al., Cross-Polarization Coupling Measured for 800 MHz Radio Transmission In and Around Houses and Large Buildings, IEEE Transactions On Antennas And Propagation, vol. AP-34, No. 1, Jan. 1986, pp. 83-87.
Donald C. Cox, Antenna Diversity Performance in Mitigating the Effects of Portable Radiotelephone Orientation and Multipath Propagation, IEEE Transactions On Communications, vol. COM-31, No. 5, May 1983, pp. 620-628.
William C.Y. Lee, Combining Technology, Mobile Communications Engineering, Chapter 10, McGraw-Hill Book Company, 1982, pp. 291-336.
P.S. Henry et al., A New Approach to High-Capacity Digital Mobile Radio, 1981 American Telephone and Telegraph Company, The Bell System Technical Journal, vol. 60, No. 8, Oct. 1981, pp. 1891-1905.
Ericsson Inc.
Lee Chiho Andrew
Nguyen Chau T.
LandOfFree
Dividable transmit antenna array for a cellular base station and does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dividable transmit antenna array for a cellular base station and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dividable transmit antenna array for a cellular base station and will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1264610