Radio communication base station device and radio...

Details Radio communication base station device and radio... Radio communication base station device and radio...

2011-06-14

2011-06-14

Appiah, Charles N (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S335000, C370S328000, C370S329000, C370S311000, C370S318000, C455S063200, C455S436000, C455S453000, C455S101000

Reexamination Certificate

active

07961695

ABSTRACT:
Provided is a radio communication base station device capable of suppressing degradation of a signal error ratio characteristic for a mobile station in the vicinity of the cell center when a plurality of signals whose transmission power is to be controlled are frequency-multiplexed or code-multiplexed. In the device (100), a classification unit (118) classifies a plurality of DPCCH according to the MCS of SCCH into a plurality of groups based on the transmission power intensity. A spread code is allocated for each DPCCH according to the classification result. A spread code for spreading a response signal (ACK signal/NACK signal) is instructed to spread units (103-1to103-n). The spread units (103-1to103-n) spread the response signal by the spread code instructed from the classification unit (118). According to the classification result in the classification unit (118), a mapping unit (104) maps the response signal after the spread to one of the subcarriers constituting the OFDM symbol.

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