where {Xk} are data symbols, andTis the OFDM symbol time. The data symbolsXkare typically complex and can be from any digital modulation alphabet (for example, QPSK, 16-QAM, 64-QAM, etc.). Note The MATLAB®implementation of the discrete Fourier transform normalizes the output of the IFF...
Orthogonal Frequency Division Multiplexing (OFDM) is the multicarrier digital modulation technique used by modern wireless communications systems such as 5G and LTE cellular, and WiFi.
OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是MCM(Multi Carrier Modulation),多载波调制的一种。通过频分复用实现高速串行数据的并行传输, 它具有较好的抗多径衰落的能力,能够支持多用户接入。OFDM技术由MCM(Multi-Carrier Modulation,多载波调制)发展而来。OFDM技术是多载波传输方案的...
2.仿真效果预览 matlab2022a仿真结果如下: 3.MATLAB核心程序 Assuming the channel response is invariant during one frame pilot_sym = pilot_generator(128); % Generate the pilot symbols, all in BPSK modulation pilot_syms=pilot_sym'; pilot_syms=pilot_syms(:)'; idx=0; for snr = 0:4:40 idx=...
(phase-shift keying, PSK) 或者正交幅度调制+2(Quadrature Amplitude Modulation, QAM) 的调制。在发送端, 设N为子载波的数量, T为OFDM符号的宽度, d(i=0, 1…N-1)为分配给每个子载波的数据符号, f:为第0个子载波的载波频率, rect() =1, |sT/2,则从t=1, 开始的OFDM符号表达式为:...
matlab2022a仿真结果如下: 2.算法涉及理论知识概要 移动视频图像传输,广泛用于公安指挥车、交通事故勘探车、消防武警现场指挥车和海关、油田、矿山、水利、电力、金融、海事,以及其它的紧急、应急指挥系统,主要作用是将现场的实时图像传输回指挥中心,使指挥中心的指挥决策人员如身临其境,提高决策的准确性和及时性,提高...
Refer to thecomm.OFDMModulatorSystem object™ which can also be used to implement the CP-OFDM modulation. F-OFDM Receiver with No Channel The example next highlights the basic receive processing for F-OFDM for a single OFDM symbol. The received signal is passed through a matched filter, foll...
matlab2022a仿真结果如下: 3.核心MATLAB预览 ... for snrl=1:length(SNR) estimation_error1=zeros(mt*mr,nse);%误差估计 R1=besselj(0,2*pi*fm*(nse+ng)/B); sigma2=10^(-SNR(snrl)/10); aa=(1-R1^2)/(1-R1^2+sigma2); %两
1.算法仿真效果 matlab2022a仿真结果如下: 2.算法涉及理论知识概要 移动视频图像传输,广泛用于公安指挥车、交通事故勘探车、消防武警现场指挥车和海关、油田、矿山、...
1.算法仿真效果 matlab2022a仿真结果如下: 2.算法涉及理论知识概要 基于索引调制的OFDM(OFDM-IM,OFDM with Index Modulation)技术被提出,在频率选择性衰落信道上提升了系统的分集增益,特别是在较低频谱效率场景下能够有效降低系统的误比特率。在OFDM-I