OFDM-CDMA TRANSMITTER AND OFDM-CDMA TRANSMISSION METHOD

摘要

PPROBLEM TO BE SOLVED: To prevent a transmission delay from being increased due to that the number of times of re-sending is increased excessively. PSOLUTION: A control part 101 outputs re-sending information containing information on the number of times of re-sending or the like to an S/P converting part 103 and a P/S converting part 104 in a transmission timing of a transmitting signal. A spreading part 102 spreads the transmitting signal. The S/P converting part 103 converts the transmitting signal from a serial data format to a parallel data format, reads a re-sending signal twice out of a memory in first re-sending and reads the re-sending signal four times from the memory in second re-sending. The P/S converting part 104 rearranges the transmitting signal to convert the transmitting signal from the parallel data format to the serial data format. An IFFT part 105 applies orthogonal frequency division multiplexing processing to the transmitting signal distributes and locates the signal in sub-carriers to obtain an OFDM-CDMA signal. PCOPYRIGHT: (C)2004,JPO&NCIPI