Pilot signal transmission in a multi-transmit antenna wireless communication system
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United States of America Patent
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-
Mar 22, 2005
Grant Date -
N/A
app pub date -
Sep 6, 2000
filing date -
Sep 6, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Pilot signals transmitted by different antennas in a wireless communication system using multiple transmit antennas are distinguished using different codes. In one embodiment, each of two antennas simultaneously transmit a time slot's worth of data while time division multiplexing a pilot signal with the data. The pilot signal from the first antenna is encoded with a first code such as a Walsh code and the pilot signal from the second antenna is encoded with a different code such as a different Walsh code. The different codes enable a receiver to distinguish the pilot signals when they are received to enable coherent detection of signals transmitted by both of the antennas.
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