摘要
基于离散小波的基本理论,提出了一种新的多载波调制技术——离散小波变换正交频分复用(DWT-OFDM)。针对下一代移动通信中频率选择性及符号干扰的问题,比较全面地研究了基于离散小波变换的调制的基带特性,包括抗载频偏移和抗脉冲干扰等各方面性能,以及该系统在 AWGN和典型无线传输环境下的表现等。理论及实践证明:在对抗窄带干扰方面, DWT-OFDM系统性能表现突出,远远优于传统OFDM系统。
The paper presents a new multicarrier modulation technology, which is called Discrete-Wavelet-Transform-based OFDM system （DWT-OFDM）, founded an discrete wavelet rheum,. Focused on frequency selectivity and symbols interence problem in the next generation wireless, we＇ve studied OFDM baseband structure based on discrete wavelet and its performance in the wireless channel. The simulation shows that DWT-OFDM performs much better than FFT-OFDM in the anti-narrow interference.
出处
《现代电信科技》
2006年第6期47-50,共4页
Modern Science & Technology of Telecommunications
基金
国家自然科学基金资助项目(69972010)
