Mobility Investigate

A Novel Approach of Linear Parallel Interference Cancellation in Uplink OFDMA Systems With Carrier Frequency Offsets

Download now Free registration required

Executive Summary

In uplink Orthogonal Frequency Division Multiple Access (OFDMA) systems, Multi-User Interference (MUI) occur due to different Carrier Frequency Offsets (CFO) of different users at the receiver. Here, the authors present a multistage Linear Parallel Interference Cancellation (LPIC) approach to mitigate the effect of this MUI in uplink OFDMA. The proposed scheme first performs CFO compensation (in time-domain) followed by K DFT operations (where K is the number of users) and multistage LPIC on these DFT outputs. They scale the MUI estimates by weights before cancellation and optimize these weights by maximizing the average Signal-to-Interference Ratio (SIR) at the output of the different stages of the LPIC.

  • Format: PDF
  • Size: 397.4 KB