3G UMTS system,compared with 4G LTE system,has the main disadvantage of the presence in the bandwidth and data rates, but better than the latter in the voice services and system coverage. In order to maintain the continued competitiveness of the evolution of UMTS systems,3GPP-LTE International Standardization Organization recently launches the S-UMTS research projects for 2G spectrum scattered over the age of migration. In the spectrum polymerization conditions,the wireless communication system using multiple access technology must be flexible to allocate resources to support non-contiguous occupied spectrum,and also maintain a good anti-jamming capability. The use of filtered multitone ( FMT) modulation to achieve polymeric transmission for narrow band UMTS signal becomes one of candidates in 3GPP. In the proposed CDMA-FMT system,the channel estimation scheme in the traditional WCDMA system can’ t be applied directly. Therefore,according to the transmission characteristics of the UMTS system and FMT system,propose a channel es-timation of narrow band CDMA multicarrier system based on the transmission of filter bank. Theoretical analysis and simulation results show it has a low computational complexity of the program and a good channel estimation performance.%3G的UMTS系统相比4G LTE系统,主要在系统带宽和数据速率上存在劣势,而在语音业务和系统覆盖上优于后者。为了保持UMTS演进系统的持续竞争力,3GPP-LTE国际标准化组织针对2G时代迁移过来的零散频谱,近期启动了S-UMTS的研究项目。在频谱聚合条件下,无线通信系统采用的多址技术必须能灵活支持非连续占用的频谱资源分配,同时保持较好的抗干扰能力。而采用滤波多音调制技术(FMT)实现窄带UMTS信号的聚合传输成为3GPP中的候选方案之一。在所提出CDMA-FMT系统中,传统WCDMA系统中的信道估计方案无法直接适用。因此,文中根据UMTS系统和FMT系统各自的传输特点,提出了基于滤波器组传输的窄带CDMA多载波系统中的信道估计方案。理论分析和仿真结果表明,该方案的计算复杂度较低,具有良好的信道估计性能。
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