本文介绍了一种在FPGA中实现的增强型正交频分复用调制器设计，它使用了逆FFT模式的莱迪思快速傅立叶变换（FFT）Compiler IP核和莱迪思有限脉冲响应（FIR）滤波器IP核。该设计解决了在没有主控制器的情况下生成复杂测试模式的常见难题，大大提高了无线链路 ...

OFDM是一种现代宽带无线通信系统应用的技术。OFDM调制中最关键的运算就是IFFT，相类似，OFDM解调的核心为FFT。宽带系统中的高FFT吞吐率是至关重要的，尤其是在FFT被多路数据通道共享时。本文提供了一个可重配置无线系统中的OFDM调制解调的实现实例，实例的 ...

上一篇，我们介绍了OFDM的发展历程和多载波传输，并分析了其优缺点。总体而言，我们通过接收机的同步、信道估计和均衡处理后，OFDM可以应用到4G、5G、WIFI等无线通信中，克服其不利因素。 本篇我们聚焦OFDM的基本原理，讨论OFDM收发机的设计框架、调制与解调 ...

Over the past year I’ve been writing about potential transmission standards for a nextgeneration broadcast platform (NGBP). The most promising standards are all based on orthogonal frequency division ...

This series is excerpted from “Mobile Broadband Multimedia Networks: Techniques, Models and Tools for 4G.” Part two shows how to enhance OFDM with MIMO and other techniques. The many papers noted in ...

OFDM is a technique used in modern broadband wireless communications systems. To mitigate the effect of dispersive channel distortion in high data rate OFDM systems, CP is introduced to eliminate ...

In this paper, a Fast Fourier Transform (FFT) or inverse FFT processor for Fifth-Generation (5G) Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system’s ...