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The estimation of pseudo random sequence is of great
importance of the security in DS-CDMA system, which remains a
hot research topic in reconnaissance and supervision of wireless
communication. In DS-CDMA system, the information sequences
of
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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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（1）、设计伪随机码电路：产生八位伪随机序列（如M序列、Gold序列等）；
（2）、了解D/A的工作原理及使用方法，将伪随机序列输入D/A中（如DAC0808），观察其模拟信号的特性；
（3）、分析信号源的特点，使用EWB软件进行仿真；
-(1), pseudo-random code circuit design: eight pseudo-random sequence generation (such as M sequences, Gold sequences, etc.)
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利用一种伪随机数生成的新方法 ———超素数法，在单片机的P1.6口产生周期为498的伪随机序列。-Pseudo-random number generator using a new method--- law of prime numbers, generated in the microcontroller ports P1.6 period of 498 pseudo-random sequence.
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基于单片机的2ASK调制与解调，输入信号为伪随机M序列(2ASK modulation and demodulation based on single chip microcomputer, the input signal is pseudo-random sequence)
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