Summary
2007 International Symposium on Nonlinear Theory and its Applications
2007
Session Number:17PM2-C
Session:
Number:17PM2-C-3
Frequency Offset Compensation Scheme Using Soft Interference Cancellation in Reverse Link of MIMO?OFDMA Systems
Masaki Ogata, Takahiko Saba,
pp.88-91
Publication Date:2007/9/16
Online ISSN:2188-5079
DOI:10.34385/proc.41.17PM2-C-3
Summary:
In the reverse link of multiple input multiple output orthogonal frequency division multiple access (MIMO?OFDMA) systems, the amounts of carrier frequency offsets (CFOs) are different in each user. CFO spoils the orthogonality among subcarriers, and causes notable degradation in demodulation performance. Thus, we must compensate for CFO accurately. To compensate for CFO of every transmitted signals, the superposed received signals must be separated into each user’s component before CFO compensation. The proposed system achieves this by the use of soft parallel interference cancellation (PIC). By using a soft PIC, the received signals can be separated before CFO compensation. Simulation results can show the proposed system effectively compensates for CFO, especially in a high Eb/N0 region.