A novel carrier allocation method for multiuser OFDM system with amplifier nonlinearities

FERNANDO GREGORIO; TIMO LAAKSO

Antalya

Conferencia; 13th European Signal Processing Conference; 2005

Amplifier nonlinearities affect drastically the performance ofOFDM systems. A new carrier allocation method that reducesthe intermodulation distortion between different carriersfor multiuser OFDM system is presented. Using thisallocation technique and transmit beamforming a bit errorrate improvement is obtained in a low or medium load system.Comparison of this proposal with Block and InterleavedOFDM allocation methods is performed. Applying the novelallocation technique, the values of Input Back Off (IBO) thatcan be applied in order to obtain an adequate bit error rateare smaller than with conventional allocation techniques.