ABSTRACT
This chapter focuses on the comparison of several multiple-input multiple-output (MIMO) schemes and their suitability for broadband power line communication (PLC), taking into account the characteristics of the MIMO PLC channel. (OFDM). It also focuses based on orthogonal frequency division multiplex (OFDM) that divides the frequency-selective channel into parallel and orthogonal sub-bands or subcarriers. If the number of OFDM subcarriers is large, each sub-band is so narrow that the corresponding magnitude response is flat. There are basically two options to allocate the total transmit power for MIMO-OFDM systems. The power can be allocated across subcarriers and the power can be distributed among the available MIMO streams. The MIMO system introduced works on the level of quadrature amplitude modulation (QAM) symbols; the MIMO encoding follows the QAM modulation in the transmitter and precedes QAM demodulation in the receiver. The forward error correction (FEC) processes a single bit stream. The idea MIMO started many research activities, mainly for wireless applications.
