摘要
在MB-OFDM UWB系统中,导频图样对信道估计的影响较大,为了甄别这些影响,并寻找到较优的导频图样,根据信道的最大多径时延和最大多普勒频移以及取样率平衡原理来确定导频的时域和频域间隔,并通过性能仿真对比,得到不同的导频图样对信道估计算法和信道插值算法的影响。通过Matlab仿真实验表明,该方法较传统的导频图样设计方法更快速,具有更好的性能,可为不同信道估计方法中导频图样的选择提供依据。
Pilot pattern has great influence on channel estimation in MB-OFDM UWB system. In order to test and verify the effect, as well as find the better pilot pattern, the time domain and frequency domain in- terval of pilots is determined from the biggest multi-path time delay, Doppler frequency shift and the prin- ciple of sampling rate balance. By contrast of performance simulation, the influence of different pilot pat- terns on the channel estimation algorithm and channel interpolation algorithm could be acquired. Simula- tion experiment with Matlab indicates that this method is much faster than traditional one in pilot pattern design, and thus is of much better performance. And this could provide references for choosing the pilot patterns in different channel estimation methods.
出处
《通信技术》
2014年第2期154-158,共5页
Communications Technology
