基于切比雪夫函数逼近的超宽带脉冲设计方法

频谱共存与兼容问题是超宽带无线通信领域必须解决的一个关键问题.为了避免超宽带系统对现有窄带无线系统的干扰,一个有效的设计方法是设计适合传输的脉冲波形.将超宽带脉冲波形设计问题等效为切比雪夫函数逼近问题,利用数值分析中Remez算法,通过一次次迭代可以获得满足要求的超宽带脉冲.Matlab仿真结果表明,用这种方法设计的脉冲功率谱符合目标频谱掩模的约束要求,在二进制脉冲位置调制跳时超宽带系统中,这种脉冲在高斯信道下单链路误比特率和多用户等方面的性能要优于高斯二阶导数脉冲.

An UWB Pulse Design Method Based on Chebyshev Function Approximation

Coexistence and Compatibility is a critical issue which must be solved in Ultra-Wideband impulse radio communications.To avoid interference,one of effective methods is to design appropriate pulse waveform.In this paper the problem of pulse design was equal to the problem of Chebyshev function approximation,and Remez algorithm was used to acquire the optimum pulse.Matlab simulation results show that the power spectrum density of the pulse based on Chebyshev function approximation meets the power constraint r...