WebAug 23, 2024 · SC-FDMA的时域和频域产生方法: ... DFT-S-OFDM是在OFDM的IFFT调制之前对信号进行DFT扩展(DFT处理),然后进行IDFT,这样系统发射的是时域信号,从而可以避免发射频域的OFDM信号所带来 … WebSC-FDMA能够实现动态带宽分配,频谱利用率虽然比OFDMA低一些,但比传统频分多址高很多。 SC-FDMA的时域和频域产生方法: 1.频域的生成方法又称为DFT扩展OFDM(DFT-S-OFDM,离散傅里叶变换扩展OFDM) DFT-S-OFDM是在OFDM的IFFT调制之前对信号进行DFT扩展(DFT处理),然后进行IDFT,这样系统发射的是时域信号,从而可以避免发射 …
[1702.07673] Modulation and Multiple Access for 5G Networks
Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. It is also called linearly precoded OFDMA (LP-OFDMA). Like other multiple access schemes (TDMA, FDMA, CDMA, OFDMA), it deals with the assignment of multiple users to a shared communication resource. SC-FDMA can be … See more The transmission processing of SC-FDMA is very similar to that of OFDMA. For each user, the sequence of bits transmitted is mapped to a complex constellation of symbols (BPSK, QPSK, or M-QAM). Then different … See more 1. Low PAPR (crest factor) 2. Low sensitivity to carrier frequency offset 3. Less sensitive to non-linear distortion and hence, it allows the use of low-cost … See more • Carrier interferometry • 3GPP Long Term Evolution • OFDMA • Time-division multiple access See more WebOFDMAhas 1dBperformance gain than DFT-SOFDMwhen BERis equal to 10-2. Whenturbo coding is adopted, OFDMA has near 3dB performance gain than DFT-S OFDM when … currency of each country
求大神讲解LTE中上行SC-FDMA降低峰均比的直观理解 - 4G/5G
Web对于 sc-fdma 系统,也使用 m 个 不 同 的 正 交子载波,但 这 些 子 载 波 在 传 输 中 是 以 串 行 方 式 进 行 的。 ... 上行由于采用单载波技术,子帧结构 和 下 行 不 同 。 dft-s-ofdm 的 一 个 子 帧 包 含 6 个 (采 用 0.675 子帧时为 8 个)“长块”和 2 个“短块 ... WebSep 23, 2024 · OFDM 波形主要的缺点就是PAPR的影响,峰均比高的形成主要原因是:OFDM中的信号生成是通过iFFT完成的,iFFT以线性方式通过比例因子(即调制符 … WebIn GI DFT-s-OFDM , the known sequence is used as the GI instead of a CP. Several types of the known sequences, such as the zero sequence and a well-designed unique word , … currency of frankfurt