摘要
就非自由空间电磁波测距这一课题,给出了信道的参数化频域模型,提出了互相关MUSIC超分辨率时延估计(TDE)算法,进一步结合先进的OFDM技术提出了基于信道频域响应及OFDM技术的互相关MUSIC算法,利用OFDM这一特殊的调制解调技术方便可靠的获得了信道的频域响应。对该算法的时延估计性能进行了仿真,结果表明该算法在[SNR]=0dB、[BW]=20MHz条件下可实现精确的TDE,对应的测距误差不大于30cm,充分体现了算法的超分辨率特性及抗噪性。
EMW ranging in non-free-space is a hot topic in recent years. The parametric model of the channel in frequency domain was presented, and the cross-spectral super-resolution TDE algorithm（MUSIC） was proposed. Moreover, the super-resolution TDE algorithm based on the channel＇s frequency response and the OFDM technology was proposed. The simulation results that in the condition of [SNR]=0 dB. [BW=20 MHz, the ranging error of the algorithm is Less than 30 cm denoting its super-resolution characteristics and robustness to noises.
出处
《传感技术学报》
EI
CAS
CSCD
北大核心
2006年第3期733-736,共4页
Chinese Journal of Sensors and Actuators
基金
山东省优秀中青年科学家科研奖励基金资助(02BS011)
关键词
电磁波测距
时延估计
多径效应
超分辨率
OFDM
EMW ranging
TDE： time delay estimation
multi-path effect
Super-resolution
OFDM
