Transmitter beam-forming techniques for indoor millimeter wave communication

This paper explains a new beam-forming technique implemented in a deterministic multiple-input multiple output (MIMO) channel model. The path loss is calculated between the transmitter and the receiver antenna elements in line of sight (LOS) path. Assume that channel state information (CSI) is known as the deterministic values at the transmitter, the composite transfer function (CTF) along with the CSI (i.e. a path loss matrix), generates orthogonal beams. The same frequency is reused for multiple orthogonal beams at the same time slot. Our beam-forming technique controls the radiated power at the transmitter in such a way that the power at a particular receiving antenna element is 0dB and it is suppressed to -40dB or lesser at other receiving elements. The performance of our proposed beam-forming technique is analyzed by transmitting the QPSK modulated signal through the orthogonal beams from the transmitter and their bit error rate (BER) curve is analyzed at the receiver. The complete simulation of our system in this paper operates at millimeter wave frequency of 60GHz.