Patent ID: 7164696
Filing Date: 2007-01-16
Classification: H04B,H04J,H04L

Abstract:
1. 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: signal modulation units for a 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 a predetermined condition; and time spreading units for the number of sub-carrier groups, configured to multiplex all signals after 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.