System and method for demodulating multiple walsh codes using a chip combiner

A system for demodulating signals received through packet data channels using information on the packet data channels in a wireless packet data communication system, in which the information is received through packet data control channels and the communication system supports code division multiplexing, the system for demodulating signals comprising:

• a plurality of fingers for processing signals received from a transmitter as inputs and for performing despreading with pre-assigned spreading codes and outputting the despread chip signals;
• a chip combiner for combining the chip signals output from the plurality of fingers;
• a multiple walsh demodulator for generating Walsh symbols for performing Walsh decovering of each of the chip signals combined by the chip combiner using all Walsh codes available to the packet data channels, and when decoding of the packet data control channels is completed and information on multiple Walsh codes assigned to the packet data channels is obtained, selecting and outputting at least one Walsh symbol corresponding to the multiple Walsh codes from among the Walsh symbols;
• and
• a demapping section for demapping at least one Walsh symbol output from the multiple Walsh demodulator according to a modulation mode of the packet data channels obtained by completing decoding of the packet data control channels.

A system for demodulating signals received through packet data channels using information on the packet data channels in a wireless packet data communication system, in which the information is received through packet data control channels and the communication system supports code division multiplexing, the system for demodulating signals comprising:

• a plurality of fingers for processing signals received from a transmitter as inputs and for performing despreading with pre-assigned spreading codes and outputting the despread chip signals;
• a chip combiner for combining the chip signals output from the plurality of fingers;
• a chip buffer for storing the chip signals combined by the chip combiner;
• and
• a multiple Walsh demodulator for outputting, when decoding of the packet data control channels is completed and information on multiple Walsh codes assigned to the packet data channels is obtained, at least one Walsh symbol performing Walsh decovering of the chip signals stored on the chip buffer using information on the multiple Walsh codes.

A system for demodulating signals received through packet data channels using information on the packet data channels in a wireless packet data communication system, in which the information is received through packet data control channels and the communication system supports code division multiplexing, the system for demodulating signals comprising:

• a plurality of fingers for processing signals received from a transmitter as inputs and for performing despreading with pre-assigned spreading codes and outputting the despread chip signals;
• a chip combiner for combining the chip signals output from the plurality of fingers;
• a chip buffer for storing the combined chip signals;
• a multiple Walsh demodulator for outputting, when decoding of the packet data control channels is completed and information on multiple Walsh codes assigned to the packet data channels is obtained, at least one Walsh symbol performing Walsh decovering of the chip signals stored on the chip buffer using information on the multiple Walsh codes;
• and
• a demapping section for demapping at least one Walsh symbol output from the multiple Walsh demodulator according to a modulation mode of the packet data channels obtained by completing decoding of the packet data control channels.

A method for demodulating signals received through packet data channels using information on the packet data channels in a packet data channel receiver of a wireless packet data communication system, in which the information is received through packet data control channels and the communication system supports code division multiplexing, the method for demodulating signals comprising the steps of:

• a) processing signals received from a transmitter as inputs, performing despreading with pre-assigned spreading codes, and outputting the despread chip signals;
• b) combining the chip signals;
• and
• c) generating Walsh symbols performing Walsh decovering of each of the combined chip signals using all Walsh codes available to the packet data channels, and when decoding of the packet data control channels is completed and information on multiple Walsh codes assigned to the packet data channels is obtained, selecting and outputting at least one Walsh symbol corresponding to the multiple Walsh codes from among the Walsh symbols.

A method for demodulating signals received through packet data channels using information on the packet data channels in a packet data channel receiver of a wireless packet data communication system, in which the information is received through packet data control channels and the communication system supports code division multiplexing, the method for demodulating signals comprising the steps of:

• a) processing signals received from a transmitter as inputs, performing despreading with pre-assigned spreading codes, and outputting the despread chip signals;
• b) combining the chip signals;
• c) storing the combined chip signals;
• and
• d) when decoding of the packet data control channels is completed and information on multiple Walsh codes assigned to the packet data channels is obtained, outputting at least one Walsh symbol performing Walsh decovering of the stored chip signals using information on the multiple Walsh codes.