主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。
It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.
本文以一类高斯型混合非高斯噪声双模噪声为背景噪声，详细分析了二进制数字调制系统的抗噪声性能。
The noise performance in binary digital modulation system is analysed in the presence of gaussian hybrid additive white bimodal noise.
以调制技术为主线，介绍有线电视系统中模拟调制技术、光调制技术和数字调制技术的基本原理。
This paper takes modulation technique as main hint, summarizes the essential principle of analogue modulation technology, optical modulation and digital modulation technology.
而作为移动通信核心技术之一的数字调制技术是实现高速、高效的移动通信系统的重要保证。
As the core mobile communications technology, one of the digital modulation technique is to achieve high-speed, highly efficient mobile communication system and an important guarantee.
通过主观测量和客观测量研究了单频、数字调制信号和雷达信号对调频电视系统的干扰效应。
The interference effects of single frequency, digitally modulated signal and radar signal to FM TV systems are studied by means of the subjective and objective measurements.
最终，通过数字系统与光路的联调，验证了数字调制方案的效果，也验证了整个检测方案的可行性。
Finally, through debugging the digital system connected with optic route, the method of modulation and detection were proved.
基于OFDM的数字电视传输系统由纠错处理和数字调制等组成。
Digital television transmission system based on the OFDM consists of Error correction processing and digital modulation parts etc.
而作为移动通信核心技术之一的数字调制技术是实现高速、高效的移动通信系统的重要保证。
As the core mobile communications technology, one of the digital modulation technique is to achieve high-speed, highly efficient mobile communication syst and an important guarantee.
设计出了二次调制系统：采用连续可变斜率增量调制（CV SD）实现模拟话音信号与数字编码的转换，采用二进制相对相移键控（2DPSK）作为数字调制方式。
A twice modulation is designed:, CVSD was adopted to realize conversion between analog and digital voice signals, 2DPSK was used as the digital modulation mode.
QPSK作为一种先进的数字调制方式，特别适用于数字卫星通信系统。
QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well.
QPSK作为一种先进的数字调制方式，特别适用于数字卫星通信系统。
QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well.
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