Methods and apparatus for high data rate transmission in narrowband mobile radio channels
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
Apr 10, 1996
filing date -
Apr 10, 1996
priority date (Note) -
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Abstract
An adaptive high speed data transmission system is described. In one aspect, the transmitter for this system employs a plurality of transmit antennas which have controllable offsets. The transmitter also includes signal coding circuitry suitable for use to address transmission impairments due to fast fading in the transmission channel. At the receiver, the received signal is analyzed to determine the fading characteristics of the channel. Where slow fading is detected, the offsets are employed to convert the slow fading into fast fading. The channel characteristics are continually resampled and these characteristics are used to adjust the transmitter and the receiver to achieve optimal transmission speed.
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