摘要
A rate adaptive multi-band ultra-wideband (UWB) system based on the quadrature fractal modulation (QFM) scheme was proposed.Exploring the use of homogeneous signals as modulating waveforms in UWB system,the signal within each 528MHz sub-band was divided into 8 different frequency bandwidths using wavelets transform and these data sequences to be transmitted were embedded into homogeneous waveforms.It is found that the use of homogeneous signals in such UWB system is quite feasible,leadings to a novel multi-rate diversity strategy.Within each 528MHz sub-band,the UWB-QFM system can provide much higher data rates than that of the UWB orthogonal frequency division multiplexing (OFDM) system.Simulation results also show that the bit error rate (BER) performance of the UWB-QFM system achieves a greatly improvement over existing UWB-OFDM system.Due to the fractal properties of the homogeneous signals,these data sequences to be transmitted can be recovered using arbitrarily short receiver signal.
A rate adaptive multi-band ultra-wideband （UWB） system based on the quadrature fractal modulation （QFM） scheme was proposed. Exploring the use of homogeneous signals as modulating waveforms in UWB system, the signal within each 528MHz sub-band was divided into 8 different frequency bandwidths using wavelets transform and these data sequences to be transmitted were embedded into homogeneous waveforms. It is found that the use of homogeneous signals in such UWB system is quite feasible, leadings to a novel multi-rate diversity strategy. Within each 528MHz sub-band, the UWB-QFM system can provide much higher data rates than that of the UWB orthogonal frequency division multiplexing （OFDM） system. Simulation results also show that the bit error rate （BER） performance of the UWB-QFM system achieves a greatly improvement over existing UWB-OFDM system. Due to the fractal properties of the homogeneous signals, these data sequences to be transmitted can be recovered using arbitrarily short receiver signal.
出处
《通信学报》
EI
CSCD
北大核心
2005年第10期34-40,共7页
Journal on Communications
基金
National Natural Science Fund of China(60372097), Beijing Municipal Natural Science Fund(4052021),University IT Research Center Project(INHA UWB-ITRC)Korea, KDDI R&D Labs Co-Project, Japan.
关键词
多频率传输
积分调制
微波传输
直角频率分割
多路技术
ultra-wideband： quadrature fractal modulation： wavelet transform
orthogonal frequency division multiplexing
