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直接序列扩频DSSS，
跳频扩频FHSS，
码分多址CDMA编译码，
的实现,the realization of Direct Sequence Spread Spectrum DSSS, frequency hopping spread spectrum FHSS, Code Division Multiple Access CDMA codec,
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复接入，B/W双用户使用直接扩频序列
％ >>>multiple access b/w 2 users using DS CDMA
％ >>>format is : cdmamodem(user1,user2,snr_in_dbs)
％ >>>user1 and user2 are vectors and they should be of equal length
％ >>>e.g. user1=[1 0
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通过matlab建立码分多址通信系统的仿真平台，并仿真了扩频通信的性能-Matlab code division multiple access communication system through the establishment of the simulation platform, and simulated the performance of spread spectrum communication
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orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the spectrum is spread through the use of a user s code. User s codes are carefully chosen to be mutuall
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sequence spread spectrum transmissions
(DS-SS) are now widely used for secure
communications, as well as for multiple access.
They have many interesting properties, including
low probability of interception. Indeed, DS-SS
transmitters use a
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IEEE经典文章，CDMA PN序列差分捕获技术，文章内容详细，对学习和从事直接序列扩频同步捕获CDMA系统设计人员有很大帮助，推荐-New differentially coherent detectors for acquisition of direct sequence spread-spectrum signals are ntroduced. These detectors are alternatives to the noncoherent detectors that have
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码分多址(CDMA)技术作为第三代移动通信系统的核心技术，具有容量大、抗干扰能力强等优点。然而,传统的CDMA系统属于窄带扩频系统,它的数据速率比较低,不能胜任新一代移动通信系统
（beyond 3G）高速数据通信的需要。而多载波传输技术－正交频分复用（OFDM），作为后三代移动通信的核心技术，则具有高数据速率传输的特点。-Code Division Multiple Access (CDMA) technology as the third generation mobile commun
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盲多用户检测的LMS和RLS算法,在DS/CDMA通信系统中，为了解调出用户的有用信息，必须尽可能地抑制由其它用户扩频信号产生的多址干扰（MAI，Multiple Access Interference）。尽管最佳多用户检测器可以很好地抑制MAI，但其运算量会随着用户数的增加而呈指数增加。盲多用户检测技术可以在不知道其他用户信息的情况下检测出目标用户，所以在实际应用中有着十分重要的应用前景.-LMS and RLS algorithm Blind Multiuser Detection in D
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多径效应的时域表示实际上就是不同路径来的信号存在随机的时延差。对于抗其它扩频信号干扰性能，及抗多址干扰性能。我们这里考虑简单的情况，只考虑一个用户干扰的情况，说明其具有抗多址干扰性能就行。-Multipath effect is actually a time domain representation of the signal path to the existence of different random time delay difference. Other spread spect
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Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, which is where several transmitters can send information simultaneously over a single communicati
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Msequence Gold sequence Code Division Multiple Access (CDMA), direct-sequence spread spectrum (DSSS), a spread spectrum modulation technique
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数字信号载波传输、信道编码和交织、卷积码仿真、扩频系统、OFDM、CDMA、多址接入、MIMO系统仿真等-Digital signal transmission, channel coding and interleaving, convolution code simulation, spread spectrum system, OFDM and CDMA, multiple access, MIMO system simulation, etc。
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稀疏码多址接入，就是应5G需求设计产生的一种非正交多址技术。在发送端通过多维调制和稀疏扩频将编码比特映射成SCMA码字，接收端通过多用户检测完成译码。-Sparse code multiple access is a kind of non orthogonal multiple access technology, which should be produced by the design of 5G demand. The coding bits are mapped into SCMA
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直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码,与多用户信息数据相乘得到信息数据的直接扩频信号,再经(the direct spread code division multiple access (DS-CDMA) is a direct spread spectrum signal which is used as an address code by using a high-speed WALSH orthogonal code sequence and is mu
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