Pilot signal transmission in a multi-transmit antenna...

Details Pilot signal transmission in a multi-transmit antenna... Pilot signal transmission in a multi-transmit antenna...

2005-03-22

2005-03-22

Pham, Chi (Department: 2663)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S209000

Reexamination Certificate

active

06870825

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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European Search Report.

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