It is one of the communications way with wide development prospect to spread spectrum communication , and apply to military communication and civil communication extensively 扩展频谱通信是具有广阔发展前景的通信方式之一，并广泛应用于军事通信和民用通信中。
Spread spectrum communication became one of the communication ways with wide developing prospect , and has being applied to military communication and civil communication extensively 扩展频谱通信是具有广阔发展前景的通信方式之一，并广泛应用于军事通信和民用通信中。
Ss - aw distribution automation using distribution line carrier systems - lower layer profiles - spread spectrum adaptive wideband profile - part 5 - 3 : lower layer profiles - spread spectrum adaptive wideband profile 使用配线载波系统的配电自动化.低层轮廓.扩展频谱适配性宽带
A remote record system is designed using integrated circuit based on direct sequence spread spectrum carrier communication technology and can transfer data from the sender to the receiver via low voltage power line 本文应用扩频芯片设计了一种远程抄表系统，它采用直接序列扩展频谱通信技术，以低压电力线作为媒介进行通信。
In the text , direct sequence spread spectrum signal ( dsss signal ) is the main object , and some nonlinear methods based on chaotic theory , used in the prediction of signal and detection of signal is studied 本文以保密通信中广泛使用的直接序列扩展频谱信号( dsss信号)为主要对象,研究了一些基于混沌理论的非线性的方法在信号预测和信号检测中的应用。
The algorithin adopts two well - known ideas called spread spectrum and quantization , first applies a frequency transformation on the motion signal , and then embeds watermark bits by quantizing proper intermediate frequency coefficients 本章的算法应用了量化与扩展频谱的思想，首先对运动信号进行频域变换，在dct域上选择一定数量的中频交流系数量化嵌入水印信息。
In allusion to the problem mentioned above , a new scheme is brought forward in this paper . spread spectrum communication technology is applied in this scheme , which greatly improved the reliability of data transmission 本方案采用扩展频谱通信技术，利用扩频通信抗干扰能力强的特点，大大提高了数据传输的可靠性，实现了在中、低压电力线上的进行远程抄表的功能。
Spread spectrum and software radio is two technology of the fastest developing and the most promising . as software radio is applied to spread spectrum communication system , it result in a great flexibility in the whole system 扩展频谱技术和软件无线电技术是当今通信领域中发展最快、最有前途的两项技术，而且将软件无线电技术应用于扩频通信系统，给整个系统带来极大的灵活性。
The following is what i have done in this paper : 1 . the paper systematically introduced the fundamental knowledge of spread spectrum communication in cdma , introduced multi - user detection technology in cdma , and analysed advantages and flaws of multiuser detection technology 本文进行的主要工作如下： 1对cdma扩展频谱通信进行了系统的介绍，并详细介绍了cdma的多用户检测方法，分析一些多用户检测算法的优缺点。
Introduction to communication systems ? analysis and design of communication systems ; analog and digital modulation and demodulation , frequency conversion , multiplexing , noise and distortion ; spectral and signal - to - noise ratio analysis , probability of error in digital systems , spread spectrum 通信系统基础：通信系统分析和设计，模拟和数字调制和解调，频率转换，统计复用，噪声和失真；谱分析和信噪比分析，数字系统误码率，扩展频谱。
