在心里画妈妈     

傅洪亮 《作文大王》2008,(34)

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基于Chirp导频的DS-CDMA信道多径时延估计     

张建华  傅洪亮 《科协论坛》2011,(5)

直接序列扩频(DS-CDMA)通信系统存在的多径衰落特性使通信系统的性能急剧恶化,必须精确的估计出多径信道时延以便更好的设计通信系统。Chirp导频信号包含丰富的时域和频域信息,通过发射单分量Chirp信号作为直接序列扩频(DS-CDMA)的导频信号,在接收端采用用分数阶傅立叶变换(FRFT)进行多径时延估计。仿真结果表明该算法有良好的估计性能。  相似文献   

A novel constant modulus array for multiuser detection     

张继东郑宝玉  傅洪亮 《浙江大学学报(A卷英文版)》2005,6(1):38-42

This paper proposes a new multitarget constant modulus array structure for code division multiple access (CDMA) systems. The new algorithm for the structure is called pre-despreading and wavelet denoising constant modulus algorithm (D-WD-CMA). In the new algorithm, the pre-despreading is applied to multitarget arrays to remove some multiple access inter- ferences. After that the received signal is subjected to wavelet de-noising to reduce some noise, and used in CMA adaptive iteration …  相似文献