MULTI-CARRIER SPREAD SPECTRUM COMMUNICATIONS DEVICE AND MULTI-CARRIER SPREAD SPECTRUM COMMUNICATION METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a multi-carrier spread spectrum communications device that is high in flexibility and capable of improving transmission characteristics, and a multi-carrier spread spectrum communication method, in multi-carrier spread spectrum communication. PSOLUTION: Spreading processing of an information symbol is executed at a code spreader 24 in a transmitter 20. Here, only one-dimensional spreading of the information symbol is executed. Next, a mapper 30 arranges each chip data to a two-dimensional map composed of a frequency axis address and a time axis address, corresponding to the address of a chip by using a search table stored in a search table storage 31. The mapper 30 generates an OFDM symbol at the IFFT 25 of the transmitter 20, by using the chip data recorded in a buffer 32. The transmitter 20 transmits a multi-carrier CDMA signal via a D/A converter 26. PCOPYRIGHT: (C)2006,JPO&NCIPI