Apparatus and method for controlling power in code division multiple access system

An apparatus for controlling power in a CDMA system, comprising:

• at least one transmitting antenna;
• a RF module processing and outputting an input RF signal;
• a CDMA base band/IF receiver processing and converting the IF signal from the RF module into a baseband signal, said CDMA base band/IF receiver outputting a frame quality indicator and K number of independent estimated power values;
• a power control unit generating K independent power up/down commands in response to the frame quality indicator and the K number of independent estimated power values;
• and
• a transmitter transmitting the K independent power up/down commands from the power control unit at a subcarrier through said at least one transmitting antenna.

A method for controlling power in a CDMA system, comprising the steps of:

• processing an input information signal and outputting M number of IF signals in response to K number of independent data channel gains;
• converting the M number of IF signals into K number of RF signals and transmitting the converted K number of RF signals through K number of transmitting antennas;
• receiving and processing at least one Mobile Station (MS) signal from at least one mobile terminal;
• outputting K number of power control bits and outputting decoded data;
• generating and outputting the K number of independent data channel gains in response to said K power control bits;
• and
• independently controlling a power level of each of the K number of RF signals using the independent data channel gains.

A method for controlling power in a CDMA system, comprising the steps of:

• processing and converting an IF signal into a baseband signal, and outputting a frame quality indicator and K number of independent estimated power values;
• generating K independent power up/down commands in response to the frame quality indicator and the K number of independent estimated power values;
• and
• transmitting the K independent power up/down commands at a subcarrier through a transmitting antenna.

An apparatus for controlling power in a CDMA system using diversity antenna, comprising:

• a CDMA base band/intermediate frequency (IF) transmitter processing an information bit to output M number of IF signals;
• K number of radio frequency (RF) modules converting the M IF signals from the CDMA base band/IF transmitter into K number of RF signals and transmitting the converted RF signals through K number of corresponding diversity antennae;
• a receiver receiving a signal from a mobile station through a receiving antenna and processing the received signal to output K number of power control bits and decoded data;
• a processor generating K number of data channel gains in response to the K number of power control bits from the receiver and outputting the generated K number of data channel gains to the CDMA base band/intermediate frequency transmitter to control transmission powers of the K diversity antennae of base station;
• a receiving RF module receiving the K number of RF signals from the K diversity antennae of the base station and processing the K received RF signals to output K number of IF signals;
• a CDMA base band/IF receiver converting the K received RF signals into base band signals and outputting a frame quality indicator and K number of estimated power values;
• an outer loop power control processor generating a threshold value in response to the frame indicator;
• a power up/down command generator generating the K number of power control bits in response to K number of compared result from the comparator;
• and
• a transmitter to transmit the K number of power control bits.

A method for controlling power in a CDMA system, comprising the steps of:

• receiving and processing an input signal from a mobile terminal;
• determining K number of power control bits and decoded data from the input signal;
• generating and outputting K number of data channel gains in response to the K power control bits;
• processing an information signal and outputting M number of IF signals in response to the K number of data channel gains;
• converting the M number of IF signals into K number of RF signals with individual power levels and transmitting the converted K number of RF signals through K number of transmitting antennae of base station;
• receiving and processing the converted K RF signals from K number of transmitting diversity antenna to output K number of IF signals;
• converting the K IF signals into base band signals and outputting a frame quality indicator and K number of estimated power values;
• generating a threshold value in response to a frame quality indicator;
• comparing the K number of estimated power values with the threshold value respectively;
• generating K number of power control bits in response to K number of compared results;
• and
• transmitting the input signal with the K number of power control bits through a transmitting antenna.