• V.Meena
• Dr.R.Madhu

In cellular systems themultiple-input and multiple-output (MIMO) is a method for enhancing the capacity using multiple antennas at transmitter and receiver. MIMO has become an essential element of wireless systems including 4G-LTE. MIMO is aimed to achieve good quality of service (QOS) in high mobility environments with large arrays of many antennas in order to serve several independent terminals in terms of more signal paths and link reliability. Energy efficiency(EE), spectral efficiency(SE) and capacity are the important parameters for a MIMO system. In this paper, a framework is proposed the optimization of EE and capacity usingspatial modulation(SM) based schemes with different transmission modes. In this first the simplified closed-form approximation of the SER/BER is derived which is applicable for different modes. Both optimization problems are subject to certain error rate, transmission rate, and power constraints. By linking the error rate requirement to the transmit power via the closed-form approximation, the proposed SE and EE optimization problems can be easily solvable by simple exhaustive search with low complexity. The simulation results are obtained for EE, SE and capacity in terms of SNR for different transmission modes. It is observed that there is a gradual increase in MIMO capacity with respectto the gradual increment in SNR with different levels of transmission modes.

MIMO, LTE, Signal Beam-forming, Spatial Modulation,Energy efficiency, Transmission Modes

"Energy efficiency and capacity analysis for spatial modulation in MIMO systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.985-992, August-2018, Available :http://www.jetir.org/papers/JETIR1808146.pdf

"Energy efficiency and capacity analysis for spatial modulation in MIMO systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp985-992, August-2018, Available at : http://www.jetir.org/papers/JETIR1808146.pdf