Wireless LAN White Papers
An Approximately MAI-Free Multiaccess OFDM System in Carrier Frequency Offset Environment
Overview The Carrier Frequency Offset (CFO) effect of a new multiaccess OFDM transceiver is analyzed. This paper shows that MultiAccess Interference (MAI) due to CFO can be mitigated by choosing a proper set of orthogonal codes. That is, if the authors use M/2 symmetric or anti-symmetric codewords of the M Hadamard-Walsh codewords, MAI can be greatly reduced to a negligible amount. The new OFDM system has been shown to be approximately MAI-free when there is no CFO. The new result developed here shows that the system continues to be approximately MAI-free even in the presence of CFO. Finally, it is demonstrated by simulation that the proposed OFDM scheme with proper code selection outperforms the OFDMA and the MC-CDMA systems in a CFO environment.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | January 2005 | ||
| Format | White Papers | ||
| Topics | |||
-
Did you find this white paper useful?
White Paper RSS
Download
Register
