【摘要】 针对宽带移动通信上行链路传输,提出一种基于离散傅立叶变换(DFT)的广义多载波(GMC)频分多址方案——DFT-S-GMC。该传输方案采用DFT进行频域扩频,采用逆滤波器组变换(IFBT)实现频分复用和频分多址。理论分析和仿真表明,与现有主流上行多址方案(如OFDMA和DFT-S-OFDMA)相比,该方案具有较低的峰均比,并且对由上行用户间的定时和频率同步误差导致的多址干扰有较强的顽健性。更多还原

【Abstract】 A DFT spread generalized multi-carrier (GMC) based frequency division multiple access (FDMA) scheme, i.e. DFT-S-GMC is proposed for uplink transmission of wideband mobile communication systems. The scheme achieves spreading gains in the frequency-domain by discrete fourier transform (DFT),and the frequency division multiplexing (FDM) and FDMA by inverse filter-bank transform (IFBT). By theoretical analysis and simulation results,it is shown that the proposed scheme has good peak-to-average power ratio (PAPR) performance and is more robust to the multi-access interference (MAI) than the existed main stream uplink schemes,e.g. OFDMA and DFT-S-OFDMA scheme.更多还原