Performance Analysis of Different Adaptive Modulation Techniques in Mimo Systems on Basis of Ber Performance

Spatial Modulation (SM) is a recently proposed joint coding and modulation scheme for Multiple–Input–Multiple–Output (MIMO) wireless systems, which is receiving a growing interest. SM is used in wireless systems, which can offer good data rates and error performance with a moderately low system complexity. Adaptive modulation schemes for fading channels are usually required to fulfil certain long-term average BER targets. Performance of SSK modulation increases for increasing values of the target bit rate and of the number of antennas at the receiver. This modulation has the same robustness to channel estimation errors as conventional modulation schemes. Hence a new modulation called CoMP (Coordinated MultiPoint)–SSK modulation is proposed. CoMP-SSK modulation can provide very high bit rates at the cost of network cooperation. In this paper bit error rate performance of some popular modulation schemes have been studied and their results are compared.