摘要
提出了未授权频段LTE-U和WiFi共存时基于非连续正交频分复用(NC-OFDM)技术的非连续信道绑定方法,使LTE-U系统通过频谱感知识别到空闲的WiFi频段后可进行更加灵活地信道绑定,从而提升频谱利用率。仿真显示基于NC-OFDM的非连续信道绑定的功率谱密度(PSD)可以满足IEEE 802.11a对带外泄露的保护要求。在相同信噪比情况下NC-OFDM相比连续正交频分复用(C-OFDM)具有较低的误码率,同时在发送端的峰值平均功率比(PAPR)也较低。
The non-contiguous channel bonding under coexistence of LTE-U and WiFi in unlicensed spectrum based on non-contiguous orthogonal frequency division multiplexing（ NC-OFDM） is proposed,thus a LTE-U can identify idle spectra by spectrum sensing to improve the spectrum efficiency with more flexible channel bonding. The simulation results demonstrate that the power spectrum density（PSD） of the LTE-U non-contiguous channel bonding based on NC-OFDM can meet the out-of-band leakage requirement of IEEE 802. 11 a. Furthermore,the NC-OFDM achieves a lower error rate compared with the contiguous orthogonal frequency division multiplexing（ C-OFDM） at the same signal-to-noise ratio,and the peak-to-average power ratio（ PAPR） at the transmitter is lower as well.
出处
《高技术通讯》
北大核心
2017年第9期800-807,共8页
Chinese High Technology Letters
基金
国家自然科学基金(61561017)
海南省自然科学基金(617033)
海南大学南海海洋资源利用国家重点实验室开放项目子课题(2016013B)资助项目
