Contents
What is subcarrier in modulation?
A subcarrier is a sideband of a radio frequency carrier wave, which is modulated to send additional information. Examples include the provision of colour in a black and white television system or the provision of stereo in a monophonic radio broadcast.
What is the maximum modulation index?
A modulation index of 1 is the maximum level of modulation that can normally be applied and occurs when the envelope increases by a factor of 1, i.e. twice the steady state value, and falls to zero.
What is meant by subcarrier signal?
A subcarrier is one telecommunication signal carrier that is carried on top of another carrier so that effectively two signals are carried at the same time. For example, broadcast audio signals in the AM and FM ranges can carry a subcarrier along with the main audio signal.
What is subcarrier index modulation ( Sim ) in OFDM?
Abstract: A new transmission approach, referred to as subcarrier-index modulation (SIM) is proposed to be integrated with the orthogonal frequency division multiplexing (OFDM) syst… View more
How is spatial modulation used in multiple antenna transmission?
In [2], spatial modulation (SM) is proposed as a multiple antenna transmission technique that avoids inter-channel interference and inter-antenna synchronization.
What is the BER of SIM OFDM Rayleigh channel?
Furthermore, a closed-form analytical bit error ratio (BER) of SIM OFDM in Rayleigh channel is derived. Analytical and simulation results show error probability performance gain of 4 dB over 4-QAM OFDM systems for both coded and uncoded data without power saving policy.
What is the performance gain of OFDM without power saving?
Analytical and simulation results show error probability performance gain of 4 dB over 4-QAM OFDM systems for both coded and uncoded data without power saving policy. Alternatively, power saving policy retains an average gain of 1 dB while using 3 dB less transmit power per OFDM symbol.