Abstract:
Orthogonal Frequency Division Multiplexing with sub-carrier Index modulation
(OFDM-SIM) is a recently developed scheme which has certain advantages over
the existing OFDM scheme. In this scheme information is sent not only through
the sub-carriers but also through their indices.
The performance of OFDM-SIM has been analyzed in comparison to classical
OFDM. The energy efficiency of this technique is always more than OFDM because
all subcarriers are not active. The Bit Error Rate of OFDM-SIM is less than
OFDM for the same spectral efficiency at high signal to noise ratio values. Also
there is an enhancement in spectral efficiency for lower order of modulation and
certain sub-carrier activation ratio. Simulation results show the superiority of the
OFDM-SIM over OFDM
