Design of Sum and Difference Patterns With Common Nulls and Low SLLs Simultaneously in the Presence of Array Errors

2019 ◽  
Vol 67 (2) ◽  
pp. 934-944 ◽  
Author(s):  
Yanhong Xu ◽  
Xiaowei Shi ◽  
Anyi Wang ◽  
Jingwei Xu
Keyword(s):  
Array Errors

scholarly journals Calibration Method of Array Errors for Wideband MIMO Imaging Radar Based on Multiple Prominent Targets

2021 ◽  
Vol 13 (15) ◽  
pp. 2997
Author(s):  
Zheng Zhao ◽  
Weiming Tian ◽  
Yunkai Deng ◽  
Cheng Hu ◽  
Tao Zeng
Keyword(s):  
Multiple Input Multiple Output ◽  
Estimation Method ◽  
Target Position ◽  
Position Estimation ◽  
Least Square ◽  
Antenna Structure ◽  
Imaging Radar ◽  
Position Errors ◽  
Calibration Methods ◽  
Array Errors

Wideband multiple-input-multiple-output (MIMO) imaging radar can achieve high-resolution imaging with a specific multi-antenna structure. However, its imaging performance is severely affected by the array errors, including the inter-channel errors and the position errors of all the transmitting and receiving elements (TEs/REs). Conventional calibration methods are suitable for the narrow-band signal model, and cannot separate the element position errors from the array errors. This paper proposes a method for estimating and compensating the array errors of wideband MIMO imaging radar based on multiple prominent targets. Firstly, a high-precision target position estimation method is proposed to acquire the prominent targets’ positions without other equipment. Secondly, the inter-channel amplitude and delay errors are estimated by solving an equation-constrained least square problem. After this, the element position errors are estimated with the genetic algorithm to eliminate the spatial-variant error phase. Finally, the feasibility and correctness of this method are validated with both simulated and experimental datasets.

CONSTRUCTION OF m-METRIC ARRAY CODES DETECTING AND CORRECTING CT-BURST ARRAY ERRORS

2008 ◽  
Vol 01 (04) ◽  
pp. 589-617 ◽  
Author(s):  
Sapna Jain ◽  
Seul Hee Choi
Keyword(s):  
Finite Field ◽  
Error Correction ◽  
Linear Space ◽  
Lower Bounds ◽  
Array Codes ◽  
Hamming Metric ◽  
Array Errors

In [11], the first author introduced the notion of CT bursts in the space Mat m×s(Fq), the linear space of all m × s matrices with entries from a finite field Fq, endowed with a non-Hamming metric [16] and obtained some lower bounds for CT burst array error correction. In this paper, we first obtain various construction bounds on the parameters of m-metric array codes [16] for the detection and correction of CT burst array errors and then construct the array codes meeting these bounds.

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