Radio base station and method of controlling radio...

Details Radio base station and method of controlling radio... Radio base station and method of controlling radio...

2002-10-24

2008-03-11

Pham, Brenda (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

C370S458000

Reexamination Certificate

active

07342943

ABSTRACT:
The present invention provides a radio base station using the conventional downlink transmit diversity which can compensate for the degradation of transmission quality even when a plurality of users (mobile terminals) share a single time slot using a code division multiple system. The radio base station includes a channel estimator16for performing channel estimation of an uplink time slot; a transmit diversity controller141to14Nfor controlling the transmit diversity used for downlink time slots DL#1to DL#N based on said channel estimation and the number of users sharing the downlink time slot when using a code division multiple system; a data transmitter15for transmitting data via downlink time slots DL#1to DL#N using the controlled transmit diversity.

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U.S. Appl. No. 10/235,707, filed Sep. 6, 2002, Pending.
U.S. Appl. No. 10/279,079, filed Oct. 24, 2002, Pending.

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