| Summary: | 碩士 === 國立清華大學 === 通訊工程研究所 === 107 === Millimeter wave (mmWave) multiple-input and multiple-output (MIMO) system with large-scale antenna arrays is a key technique to provide high throughput for the next generation communication systems. To reduce the high cost and power consumption of radio frequency (RF) chains and data converters, the hybrid analog/digital precoding is the potential candidate for mmWave MIMO systems. However, the communication of mmWave systems is expected to employ on broadband channel with frequency selectivity. In this thesis, we propose a matrix-inversion-bypass hybrid precoding and combining algorithm for mmWave MIMO system with orthogonal frequency division multiplexing (OFDM) modulation. Due to the inverse fast Fourier transform (IFFT) and fast Fourier transform (FFT) processors in the transmitter and receiver, the problem of hybrid precoding for frequency selective channel is to find the shared common RF precoder for all subcarriers and individual baseband precoders for each subcarrier. By adopting the concept of the successive interference cancellation, the problem of the matrix inversion can be solved in calculating the RF precoder. The simulations show that the proposed algorithm can reduce the computational complexity with negligible performance loss comparing to the mentioned work in this thesis.
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