OFDM测距中的最佳轨迹匹配相噪补偿算法

doi:10.3969/j.issn.1001-506X.2020.03.027

Abstract

Abstract:

In recent years, orthogonal frequency division multiplexing (OFDM) has been widely used in high-precision wireless ranging systems. Aiming at the problem that OFDM high-precision ranging system is very sensitive to phase noise, this paper proposes a hierarchical optimal trajectory matching phase noise compensation algorithm based on region quantization. In this paper, a two-level codebook based on region quantization is designed according to the actual phase noise trajectory. Then, the segmentation matching method is used to select the closest phase noise trajectory in the codebook. Through the complexity analysis, the proposed method can effectively reduce the trajectory matching complexity under the same estimation accuracy. The simulation results show that the proposed algorithm can effectively track the actual phase noise trajectory, and obtain the near-optimal ranging accuracy under the premise of ensuring the codebook coverage.

Key words: high precision ranging, phase noise, quantization domain, trajectory matching

CLC Number:

TN92

Xiaohui LI, Yi XIE, Xiaozhu SHI, Jiangwei YUAN. Phase noise compensation algorithm based on trajectory matching in OFDM ranging[J]. Systems Engineering and Electronics, 2020, 42(3): 704-710.

Figures/Tables 7

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References 28

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Phase noise compensation algorithm based on trajectory matching in OFDM ranging

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