2018/01/27 by Alphan Şahin, Rui Yang, Sahin, Alphan +5
Engineering · #Microwave Engineering and Waveguides #Radio Frequency Integrated Circuit Design #Millimeter-Wave Propagation and Modeling
paper · pdf · doi:10.48550/arxiv.1801.09177
In this study, we compare the single-carrier (SC) waveform adopted in IEEE\n802.11ad and unique word discrete Fourier transform spread orthogonal frequency\ndivision multiplexing (UW DFT-s-OFDM) waveform. We provide equivalent\nrepresentations of up-sampling and down-sampling operations of the SC waveform\nby using discrete Fourier transform (DFT) and inverse DFT to enable explicit\ncomparison of these two similar waveforms. By using this representation, we\ndiscuss why the IEEE 802.11ad SC waveform can cause suboptimal performance in\nmultipath channel and discuss how to improve it with UW DFT-s-OFDM. With\ncomprehensive link-level simulations, we show that replacing the 802.11ad SC\nwaveform with UW DFT-spread OFDM can result in 1 dB gain in peak throughput\nwithout affecting the IEEE 802.11ad packet structure. We also evaluate the\ncross links where the transmitter is UW-DFT-s-OFDM and the receiver is\ntraditional SC-FDE or vice versa. We demonstrate that UW DFT-s-OFDM receiver\ncan decode an IEEE 802.11ad SC waveform with a slight SNR loss while IEEE\n802.11ad SC receiver can decode a UW DFT-spread OFDM waveform with an\ninterference floor.\n