A new code selection scheme is proposed to reduce the MAI of an approximately MAI-free OFDM transceiver that is known as the repetitively coded multi-carrier CDMA (RCMC-CDMA) in this work. That is, if we use M/2 symmetric codewords or anti-symmetric codewords of the M Hadamard-Walsh codes, the MAI of the system can be greatly reduced. With this code selection scheme, the requirement of a sufficiently large number of subchannels to achieve the MAI-free property can be relaxed so that the approximately MAI-free property still holds when the number of subchannels is relatively small.
|Number of pages||5|
|Journal||IEEE Vehicular Technology Conference|
|State||Published - 1 Dec 2004|
|Event||2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States|
Duration: 26 Sep 2004 → 29 Sep 2004
- Codeword selection
- Multiaccess OFDM