transmit power reduction in MIMO-THP using tilted constellation

Tomlinson-harashima precoding THP is a good candidate in MIMO systems due to its simple implementation . Although THP method has a number of advantages in MIMO systems however it suffers from some drawbacks including module loss shaping loss and power loss in the THP technique due to modulo operation the transmitted symbols are distributed over a bounded region which is larger than the original constellation hence the transmitted power will be increased. it is shown that the transmitted power can be reduced significantly by tilting or rotating the original constellation and hence some of the power loss are recovered.

کلیدواژه ها:

MIMOchannel ، tomlinson harashima precoder ، zero forcing ZF precoder ، minimum mean squared error MMSE precoder ، tilted constellation