Focused on the low accuracy of time of arrive (TOA) estimation in traditional energy detection methods with the presence of narrowband interference, a square filtering technique combining square-law device and band-pass filter is used to eliminate the influence of narrowband interference on TOA estimation in this paper. Then the TOA estimation algorithm is applied to get output estimation results with the IEEE 802.15.4 CM3 channels and CM4 channels. Theoretical analysis and simulation results show that the proposed ED method using square filtering technique has higher TOA estimation accuracy than the traditional ED method in the presence of strong NBI. In the line-of-sight (LOS) environment, the TOA estimation accuracy can be improved from 2.8 ns to 0.5 ns after applying the square filtering scheme, and in non-line-of-sight (NLOS) environment, it can be improved from 6 ns to 1 ns.
JING Yanliang, LUO Xuetao, WANG Xue, NIE Hong
. TOA Estimation Based on Narrowband Interference Mitigation Technique[J]. Journal of Applied Sciences, 2020
, 38(3)
: 455
-465
.
DOI: 10.3969/j.issn.0255-8297.2020.03.011
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