Performance of MIMO enhanced spatial modulation under imperfect channel information

Enhanced Spatial Modulation (ESM) is a novel wireless scheme that uses combinations of antenna indexes and constellation types to increase the throughput compared to standard Spatial Modulation. We analyze the performance of ESM in 2×4 and 4×4 MIMO systems under imperfect channel information for uncorrelated and correlated Rayleigh and Rician fading. The performance of ESM is compared to Spatial Modulation (SM) and Multiple Active-Spatial Modulation (MA-SM) systems. We find ESM to be marginally superior to SM in most cases while performing worse than MA-SM in cases other than Rayleigh fading. Additionally, ESM exhibits improved tolerance to channel information errors.