Orthogonal frequency division multiplexing ( ofdm ) is a suitable digital modulation technique for broadband systems 正交频分复用( ofdm )技术是一种适用于宽带系统的多载波数字调制技术。
In chapter 2 , the principle of gmsk modulation is given in detail based on the discussion of various digital modulation techniques used in mobile communications . chapter 3 deals with the dsp assembly language implementation of 0 . 3 gmsk for gsm mobile phone test set 第二章从数字移动通信系统中常用的调制解调方式出发,比较了实现gmsk调制的几种方法,提出了波形存储正交调制实现gmsk调制的基本原理。
Ofdm is one of multi - carrier digital modulation techniques , in which a single high data rate data stream is transmitted using a number of lower data rate sub carriers , it has many properties , such as robustness to multi - path fading , high data rate transmission capability with high bandwidth efficiency , and so on Ofdm是一种特殊的多载波传输方式,它使用一系列低速子载波并行传输数据,使得它具有抗多径干扰的能力、能以很高的频谱利用率实现高速数据传输等。
Orthogonal frequency division multiplexing ( ofdm ) is a multi - carrier digital modulation technique . its conception has come out for a long time , however , it is recently that it ' s recognized as an proposed method in broadband bi - direction wireless data communications with the development of multimedia services 正交频分复用( ofdm )技术是一种多载波数字调制技术,虽然ofdm的概念已经存在了很长时间,但是直到最近,随著多媒体业务的发展,它才被人们认识到是一种实现高速双向无线数据通信的良好方法。