Multi-carrier CDMA communication device, multi-carrier CDMA transmitting device, and multi-carrier CDMA receiving device

A multi-carrier CDMA communication apparatus comprising a transmitter and a receiver configured to perform transfer of data, using a multi-carrier CDMA method,

• said transmitter including:
• a setting unit configured to set a code rate of error correction, a number of sub-carrier groups, a frequency spreading rate, a number of code multiplexes of frequency spreading code, a frequency spreading code, a time spreading rate, a number of code multiplexes of time spreading code, and a time spreading code;
• signal modulation units for the number of sub-carrier groups configured to perform frequency spreading for each sub-carrier signal of each channel constituting a sub-carrier group, based on the set conditions;
• and
• time spreading units for the number of sub-carrier groups, configured to multiplex all the signals after the modulation processing and the frequency spreading for each sub-carrier signal, and perform time spreading with respect to the multiplexed signals for each sub-carrier signal;
• and
• said receiver including:
• time despreading units for the number of sub-carrier groups, configured to perform time despreading for each sub-carrier signal;
• and
• signal demodulation units for the number of sub-carrier groups, configured to perform frequency despreading for each sub-carrier signal after the time despreading.

A multi-carrier CDMA communication apparatus comprising a transmitter and a receiver configured to perform transfer of data, using a multi-carrier CDMA method,

• said transmitter including:
• a setting unit configured to set conditions of a code rate of error correction, a number of sub-carrier groups, a frequency spreading rate, a number of code multiplexes of frequency spreading code, a frequency spreading code, a time spreading rate, a number of code multiplexes of time spreading code, and a time spreading code;
• signal modulation units for the number of sub-carrier groups configured to perform frequency spreading and time spreading for each sub-carrier signal of each channel constituting a sub-carrier group, based on the set conditions;
• and
• said receiver having signal demodulation units for the number of sub-carrier groups, configured to perform time despreading and frequency despreading for each sub-carrier signal.

A multi-carrier CDMA transmitter which transmits data, using the multi-carrier CDMA method, said transmitter comprising:

• a setting unit configured to set conditions of a code rate of error correction, a number of sub-carrier groups, a frequency spreading rate, a number of code multiplexes of frequency spreading code, a frequency spreading code, a time spreading rate, a number of code multiplexes of time spreading code, and a time spreading code;
• signal modulation units for the number of sub-carrier groups configured to perform frequency spreading for each sub-carrier signal of each channel constituting a sub-carrier group, based on the set conditions;
• and
• time spreading units for the number of sub-carrier groups, configured to multiplex all the signals after the modulation processing and the frequency spreading for each sub-carrier signal, and perform time spreading with respect to the multiplexed signals for each sub-carrier signal.