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It uses spread spectrum technology. 它使用扩频技术。
Wireless Spread Spectrum Communication and Its. 无线扩频通信及其应用。
Study of Spread Spectrum Receiver. 扩频接收机的研究。
Then digital matched filter (DMF), which is used to synchronize spread spectrum code, especially the multi-rate sampling in DMF is studied. 然后探讨了用于扩频码同步的数字匹配滤波器(DMF)，着重分析了DMF的多倍码速率采样问题；
The characteristic and quantity of spread spectrum address code has great influence and restriction to CDMA system performance and capability improvement. 在CDMA系统中，扩频地址码的特点和数量在很大程度上影响和制约着CDMA系统性能和容量的提高。
To despread and demodulate the signal correctly in the spread spectrum system, the PN code phase of the receiver must be synchronized with that of the input signal precisely. 在扩频通信系统中，为正确解扩和解调接收到的扩频信号，接收机的PN序列相位和接收信号的PN序列相位必须完全同步；
The generating of pseudo random sequence is one of the key subjects to realize the spread spectrum technique upgrade for BPC low frequency time code radio station. 伪随机序列的产生是实现BPC低频时码发播台扩展频谱技术升级的一个重要环节。
To solve the problem of tracking for direct sequence spread spectrum signals where data is non-coherent with code, a new method of tracking is presented. 摘要针对数据位和伪码周期非相参时直接序列扩频信号的跟踪问题，提出了一种新的跟踪方法。
The Future of Spread Spectrum Communications in the Datong Coal Mine Group Co. 扩频通信技术在大同煤矿的应用前景。
Frequency-hopping spread spectrum (FHSS) was developed by the military for secure communications. 跳频扩频（FHSS）是由军方为保密通信开发的。
Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum. 扩频技术是在无线电电磁频谱中无条例管制的部分中竞争。
In the acquisition ways of the direct sequence spread spectrum code,sequence probability ratio test(SPRT) acquisition is a better way,acquisition time reduced 2 to 10 times compared with correlation acquisition. 在直扩编码的捕捉方法中;序贯捕捉法是一种较好的捕捉方法;与相关捕捉法相比其速度能提高2~10倍.
An algorithm based on the Haar wavelet transform(HWT) was developed for blind estimates of pseudo-random code(PC) rates and symbol periods of direct sequence spread spectrum(DS/SS) signals in low signal to noise ratio environments. 为解决低信噪比下直扩信号的参数估计问题,提出了一种基于H aar小波变换实现直扩信号伪码(PC码)速率和符号周期盲估计的新型算法。
Spread spectrum has two distinct flavors: direct sequence and frequency hopping. 该技术有两个明显的变型：直接顺序与跳频。
By means of the good period correlation of pseudorandom code and using the synchronism technology, the data transmission ability of the spread spectrum communication system is effectively improved. 提出了一种多幅扩频技术，利用伪随机码良好的周期互相关性，采用同步技术，有效地提高了扩频通信系统数据传输能力。
The equivalent discrete receiver signal is modeled and denoted in matrix expression form.Also, the relations between taps of receiver equalizer and equivalent spread spectrum code matrix are deduced. 分析了衰落信道下的等效离散接收信号模型，给出其矩阵表达式，进而推导出了接收端均衡器的权系数与等效扩频码矩阵间的关系。
Pseudo random sequence has broad applications in stream cipher, channel coding, and spread spectrum communication. 伪随机序列在流密码、信道编码、频通信等领域有着广泛的应用.
A better method for direct sequence spread spectrum(DSSS) receiver to decrease the acquisition time is proposed. 提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法。
A small scale digital trunking communication system based on the spread spectrum technology was presented. 介绍了一种基于扩频技术的全双工通信小型集群通信系统。
Spread spectrum was conducted first, and then it was embedded into watermark by means of integer modulo. 嵌入水印时，先对水印信息进行扩频，再利用基于模运算的方法嵌入水印。