Journal
IEEE ACCESS
Volume 7, Issue -, Pages 25382-25397Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2900162
Keywords
Power inversion array; electromagnetic-vector-sensor; interference suppression; global navigation satellite system
Categories
Funding
- National Natural Science Foundation of China [61701462, 41527901, 61871354, 61727806]
- Qingdao National Laboratory for Marine Science and Technology [2017ASKJ01]
- Open Studio for Marine High Frequency Communications, Qingdao National Laboratory for Marine Science and Technology
- Pilot National Laboratory for Marine Science and Technology through the Marine S&T Fund of Shandong Province, Qingdao [2018SDKJ0210]
- Qingdao Science and Technology Plan [17-1-1-7-jch]
- Fundamental Research Funds for the Central Universities [201713018]
- Natural Science Foundation of Shandong Province [ZR2017MD02]
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Power inversion (PI) arrays have been employed to suppress interference in satellite navigation systems. When the incident direction of a satellite signal is near that of the interference, there will be a significant degradation in the signal to noise ratio (SNR). To reduce this degradation, a PI antenna array composed of a right-hand circular polarized (RHCP) antenna and a spatially-spread electromagnetic vector sensor (SS-EMVS) subarray is proposed, which can suppress interference and acquire satellite signals in both the polarized and spatial domains. Even when the satellite signal is incident from the same direction as the interference, the SNR degradation can be reduced by exploiting the difference in polarization states. It is shown that the filtering is improved in the polarization domain compared with an RHCP PI array, and the SNR loss is lower than with an SS-EMVS PI array while the computational complexity is not increased. Furthermore, the proposed PI array is effective for all Beidou satellite system public service signals.
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