Transmit beamforming (TBF) has been proposed as an effective approach to enhance the security performance of multiple-input single-output (MISO) wiretap channels. However. this secrecy enhancement comes at some expenses. such as power consumption and the amount of signal processing. https://www.roneverhart.com/Corvette-Spark-Plugs-Set-NGK-Iridium-IX-1992-1995-C4/