HSDPAHSUPA+for+UMTS+High+Speed+Radio+Access
The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of...
The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of...
This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency...
Since the principle of multi-carrier code division multiple access (MC-CDMA) was simultaneously proposed by Khaled Fazel et al. and Nathan Yee et al. ...
在扩频系统中,不仅要求扩频码有随机性好,周期长和不易被检测等特点,而且要求 可用的伪随机序列数尽可能多。已经知道m序列满足扩频码的基本条件,它具有双值自相关特性,有良好的自相关特性。但是它的互相关特性不是很好,特别是使用m序列作为码分多址(CDMA,Code Division Multiple...
正交频分复用技术(Orthogonal Frequency Division Multiplexing, OFDM)非常适合高速通信系统,但存在高峰均功率比(PAPR)的问题。对OFDM系统中如何降低PARR的问题进行了研究,讨论了降低PAPR的主要方法,重点分析了选择性映射法(SLM),并在此基础...