کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
466436 | 697841 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pre-processing optimization for IBI mitigation in an OFDM system over channels with large delay spreads Pre-processing optimization for IBI mitigation in an OFDM system over channels with large delay spreads](/preview/png/466436.png)
When the cyclic prefix (CP) in an orthogonal frequency division multiplexing (OFDM) system is shorter than the delay span of wireless channels, inter-block interference (IBI) and inter-carrier interference (ICI) will occur. To effectively mitigate interference in this case, pre-processing approaches at transmitters based on full channel state information (CSI) have been proposed. However, feeding full CSI back will occupy significant bandwidth and is impractical sometimes. Therefore, a pre-processing optimization exploiting limited CSI is investigated in this paper; several pre-processing optimization approaches have been developed. Simulation results show that the proposed algorithms can effectively cancel the IBI and ICI and significantly improve the performance in OFDM systems.
Journal: Physical Communication - Volume 3, Issue 3, September 2010, Pages 198–204