It’s important to have a fundamental understanding of Orthogonal Frequency Division Multiplexing (OFDM) because this technology is a basic building block for many of the current modulation schemes including; 802.11WLAN, 802.16 WiMAX, and 3GPP LTE. This topic discusses the basic concepts of OFDM and...
本文祥细介绍了FIR 滤波器和NCO 的 FPGA 实现方法，并结合QuratusII 给出了相应的仿真波形。收稿日期：2011-05-31 稿件编号：201105135 作者简介：胡同花（1982—）女，湖南永州人，讲师 。研究方向：计算机网络。图1 OFDM 调制原理图 Fig.1 Diagram of OFDM modulation principle －139－ ...
Refer to the comm.OFDMModulator System 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, ...
Next, we configure the system's data transmitter. This processing includes channel coding, bit mapping to complex symbols, splitting of the individual data stream to multiple transmit streams, precoding of the transmit streams, OFDM modulation with pilot mapping and replication for the transmit antenna...
we are currently developing a DSRC 5.9 GHz system that uses OFDM modulation. My group has been assigned the PHY layer, and its block diagram (just the transmitter side) is the picture i've attached. The part that is raising some questions is the transition between the QAM map...
Perform OFDM modulation of one subframe of random uniformly distributed noise using a 10 MHz two-antenna configuration. Get enb = struct('NDLRB',50,'CyclicPrefix','Normal','CellRefP',2); dims = lteDLResourceGridSize(enb); regrid = reshape(lteSymbolModulate(randi([0,1],prod(dims)*2,...
如果当前采用的调制方法的误码率较高,那么选择子模块就会自动调整采用其他的调制方法,达到采用最佳调制方法。图1 调制解调模块原理框图 Fig 1 Function block diagram for modulation and demodulation 集成电路设计与开发 Design and Development of IC 440 半导体技术第33卷第5期 2008年5月 ...
Both modulation and multiplexing are achieved digitally using an inverse fast Fourier transform (IFFT) 1 and as a result, the required orthogonal signals can be generated precisely and in a very computationally efficient way. In FDM/WDM there are frequency guard bands between the subcarriers. ...
: ‘ Designing pipeline FFT processor for OFDM (de)modulation ’. Proc. Int. Symp. Signals, Systems, and Electronics , Pisa, Italy , September 1998 , pp. 257 – 262 .S. He and M. Torkelson: "Designing pipeline FFT processor for OFDM (de)modulation," ISSSE 98 (1998) 257 (DOI: ...
Figure 1. Block diagram of a generic CO-OFDM system Due to OFDM’s drastic litheness to the channel dispersion in the optical domain, it has been widely investigated for many applications [31]. The key proposition of OFDM is its linear modulation and demodulation while keeping linearity in pr...