Lead Inventor:
Xiaodong Wang, Ph.D.
Cellular data transmission across multiple antennas:
When transmitting data wirelessly over a large distance, the wireless signal can often be corrupted as signal power is scattered and absorbed by objects between the transmitter and receiver. This problem is encountered frequently in cellular networks, and is commonly alleviated by redundantly transmitting the data signal through multiple antennas at the cellular base station. However, long-distance transmission necessarily means that the base station will be transmitting to a mobile receiver that is located near the edge of where one cell ends and another begins. Consequently, an additional problem in cellular transmissions is the interference between two base stations transmitting in neighboring cells to a receiver at the cell edge. This technology is a transmission scheme that solves the problem of interference between two different base stations while maintaining the popular multi-antenna transmission scheme and its associated benefits.
Data signal from base stations is transmitted through multiple antennas and coded uniquely for each antenna:
In this technology, the data signal from every base station is transmitted through multiple antennas, and is coded uniquely for each antenna it is sent through. Additionally, all of the base stations in the cellular network are synchronized and use an identical coding scheme. As a result, the mobile receiver can easily distinguish the nearby base station from the out-of-cell base station, and employ interference cancellation to improve the transmission performance.
Applications:
-- Eliminating interference between cellular base stations
Advantages:
-- Fidelity of the cellular downlink is improved; fewer calls may be dropped
-- The decrease in interference at the edge of cells may allow the size of cells to be increased; fewer costly base stations may be needed for a given area
Patent Status: Patent Pending ~ see link below.
Licensing Status: Available for Sponsored Research Support
