摘要
为了有效提高系统的频带利用率,该文提出了基于椭圆球面波函数(PSWF)的正弦载波调制方法。在该方法中,采用时域持续时间有限、频域带宽近似有限的椭圆球面波函数设计频谱相互混叠或交叠的多路时域正交基带调制波形,进行多路基带预调制,通过正弦载波调制将信号频谱搬移至辐射频段。经理论分析及仿真验证,该调制方法可使通信系统的单位频带利用率快速接近2Baud/Hz,提升速度优于OFDM调制,同时也使系统具有较好的功率利用率,且简单易实现。
For improving the bandwidth efficiency,a sinusoidal modulated method based on Prolate Spheroidal Wave Functions（PSWF） is proposed.The basedband modulated orthogonal waveforms is designed based on PSWF,which is time-limited and band-limited approximately.The orthogonal waveforms＇spectrum is mixed or overlapped in frequency domain.The information is modulated by multi-plexing baseband modulation.The spectrum shifting is achieved by sine carrier modulation.By simulation and analysis,the system bandwidth efficiency can be fast closed to 2 Baud/Hz and the approximating speed is greater than that of OFDM system,the power efficiency is better as well.The modulation method is easily realizable.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第7期1543-1547,共5页
Journal of Electronics & Information Technology
关键词
无线通信
调制
频带利用率
椭圆球面波函数
Wireless communication
Modulation
Bandwidth efficiency
Prolate Spheroidal Wave Functions（PSWF）
