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Data transmission method and equipment

  • US 20040160921A1
  • Filed: 10/24/2003
  • Published: 08/19/2004
  • Est. Priority Date: 04/26/2001
  • Status: Active Grant
First Claim
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1. A data transmission method where a signal is transmitted from a transmitter by means of three or more radiation patterns, characterized by transmitting a primary common pilot signal by means of at most two radiation patterns and a secondary common pilot signal by means of at least one radiation pattern by adjusting the power ratio between the primary common pilot signal and the secondary common pilot signal and the total power of the primary and the secondary common pilot signal, transmitting a dedicated pilot signal with at least one user signal with adjustable transmit power, such that the ratio of the power levels of the dedicated pilot signals transmitted with the same radiation patterns as the secondary common pilot signal to the power of the dedicated pilot signals transmitted with the same radiation patterns as the primary common pilot signal is inversely proportional to the power ratio between the corresponding secondary and primary pilot signals, and by using the dedicated pilot signals transmitted with the same radiation patterns as the secondary common pilot signal for channel estimation measurements in the receiver.

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