摘要
介绍了一种低复杂度、低峰均比的非连续正交频分复用(NC-OFDM)传输技术。该技术利用裁剪傅里叶变换,有效降低了系统调制解调的实现复杂度。基于非连续CI码的PAPR抑制技术使系统PAPR降低80%以上。相对于传统OFDM技术,所提出的NC-OFDM技术可以把非连续的频谱聚合起来,大幅度提升语音的传输速率。
A VolP transmission technique of non-continuous orthogonal frequency-division multiplex with low implementa- tion cost and peak-to-average power ratio is introduced. A prune fast Fourier transform method is proposed to handle the problem of system implementation complexity in modulation and demodulation. The system PAPR is reduced more than 80% by using the proposed algorithm based on non-continuous CI codes. Compared with the traditional OFDM, the transmission technique of NC - OFDM in this paper can aggregate no-continues spectrum and thereby improve the speech transmission rate significantly.
出处
《电声技术》
2012年第8期35-38,共4页
Audio Engineering
关键词
非连续正交频分复用
快速傅里叶变换
峰均比
非连续CI码
non-continuous orthogonal frequency-division multiplex （ NC - OFDM ）
fast Fourier transform （ FFT）
peak-to-average power ratio （PAPR）
non-continuous CI codes（ NCI codes）
