Spatial division multiple access wireless communication systems

Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

364574, 370203, 370252, H04Q 700

Patent

active

056423535

ABSTRACT:
A method and apparatus for increasing the capacity and quality of wireless communication between a plurality of remote users and a base station is disclosed. Using measurements from an array of receiving antennas at the base station, parameters of multiple signals transmitted to the base station from a plurality of users in the same channel are calculated and used to obtain the positions and velocities of the users. The locations and other related signal parameters are used to calculate appropriate spatial demultiplexing strategies, reconstructing the individual transmitted signals from the receiver measurements and reducing interference to acceptable levels. This heretofore unavailable location information is used in solving the hand-off problem. This information is also used to calculate an appropriate spatial multiplexing strategy for simultaneous transmission of signals to users in the same channel. This can be the same as or distinct from the aforementioned receive channel. In combination, the transmit and receive systems establish multiple full-duplex links in the same channel by directively receiving and transmitting signals at the base stations only. This invention can also be implemented at the mobile sites to improve signal quality and to establish point-to-point communication links between multiple mobile users. Furthermore, implementation of both transmit and receive functions at the base station is not required. A receive-only system base station will still improve received signal quality and therefore capacity in addition to mitigating the hand-off problem.

REFERENCES:
patent: 4626859 (1986-12-01), Stansfield
patent: 5260968 (1993-11-01), Gardner et al.
patent: 5471647 (1995-11-01), Gerlach et al.
patent: 5515378 (1996-05-01), Roy, III et al.
Weiss et al., "Direction Finding for Wide Band Signals Using an Interpolated Array", 1991, IEEE Publication pp. 583-587.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Spatial division multiple access wireless communication systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spatial division multiple access wireless communication systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial division multiple access wireless communication systems will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-153649

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.