多径信道下UFMC系统的信道估计

doi:10.11959/j.issn.1000-0801.2018113

Abstract

Abstract:

As a candidate waveform of 5G,universal filter multi-carrier (UFMC) technology could inhibit out-of-band radiation,achieve loose synchronization and well support the short bursts of things in the transmission.However,in the UFMC transmission without cyclic prefix (CP),inter-symbol interference (ISI) and subcarrier interference (ICI) are generated in the multipath fading channel,which will affect the estimation accuracy in channel estimation.The interference of the UFMC system in multipath channel was firstly analyzed.After using the feedback equalization suppression ISI,the self-elimination algorithm was used to suppress the ICI according to the similarity between adjacent carriers,and the pilot coefficients were designed according to the UFMC system.Finally,the simulation results show that the proposed method applied to the UFMC can suppress the interference,improve the accuracy and reduce the bit error rate.

Key words: UFMC, inter-symbol interference, subcarrier interference, pilot design, channel estimation

CLC Number:

TN919

Xiang YU,Yanni GAO,Sirui DUAN. Channel estimation of UFMC system in multipath channel[J]. Telecommunications Science, 2018, 34(4): 22-30.

Figures/Tables 8

References 21

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仿真项目	参数
FFT点数N	512
实际占用子载波数	120
子载波数/子带	12
子带数	10
OFDM中CP长度	20
均衡方式	频域单抽头
调制方式	QPSK
滤波器	切比雪夫
旁瓣衰减/dB	40
滤波器长度	21

Channel estimation of UFMC system in multipath channel

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