High-Resolution Algorithm of Time Delay Estimation in Multipath Environments
Hong Ma · Aerospace Shanghai · 2010
A new high-resolution algorithm for time delay estimation of multipath propagation signals based on least square criterion was proposed in this paper. The received data was decomposed into the signal components and then to estimate the amplitude and time delay of each signal component separately,while the cubic spline interpolation being used and based on least square criterion.The received data was reconstructed by signal components through iterated back and forth to let the reconstructs data to be the best estimation of the received data.The simulation results showed that the algorithm was very robust under the low signal-to-noise ratio(SNR),which could provide high-resolution and accuracy time delay estimation in low SNR,narrowband signal and multipath environments and have the better performance than multiple-signal-classification(MUSIC) method of time difference measurement.