OFDM detection in a macrodiversity system with multiple frequency offsets
نویسندگان
چکیده
Macrodiversity is used to provide better coverage in wireless communications. Two examples are single frequency networks (SFN) and soft handoff. We show that an OFDM system utilizing macrodiversity is very sensible to poor synchronization among transmitters and to Doppler shifts, and that serious performance degradation results from such effects. We provide a solution, based on inter-carrier interference (ICI) cancellation methods, that results in significantly improved performance and robustness to frequency offsets. Simulation results show the applicability to OFDM systems implementing SFN and soft handoff.
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