The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dalam radar bistatic, adalah penting untuk menyekat isyarat yang tidak diingini seperti isyarat yang disebarkan terus daripada pemancar dan komponen berbilang laluannya. Secara konvensional, beberapa kaedah penindasan telah dicadangkan. Mereka dikategorikan ke dalam kaedah menggunakan sistem maklum balas dan kaedah yang menolak replika isyarat yang tidak diingini. Kaedah terdahulu mungkin mempunyai masalah pada penumpuan prestasi penindasan. Kaedah terakhir memerlukan masa tunda yang tepat bagi isyarat yang tidak diingini. Dalam makalah ini, kami mencadangkan kaedah baharu untuk mengesan sasaran dalam radar bistatik berasaskan TV terestrial digital yang berdasarkan pemultipleksan pembahagian frekuensi ortogon (OFDM), tanpa sebarang maklumat mengenai masa kelewatan isyarat yang tidak diingini. Dalam kaedah yang dicadangkan, kami menyesuaikan skema berdasarkan algoritma nisbah isyarat kepada hingar (MSN) maksimum, yang menjadikan isyarat kepada gangguan ditambah nisbah hingar (SINR) maksimum untuk komponen isyarat yang dikehendaki. Kepekaan maksimum dikemudi supaya sepadan dengan laluan yang menunjukkan kelewatan yang berkaitan dengan kedudukan sasaran, seolah-olah pancaran carian dikemudi sepanjang arah dalam pemprosesan isyarat tatasusunan. Dalam kaedah yang dicadangkan, "nulls" juga dibentuk untuk komponen kelewatan lain ditindas secara serentak. Dalam domain frekuensi, komponen pembawa isyarat berselerak dibahagikan dengan isyarat rujukan menunjukkan kelewatan yang disebabkan oleh penyebaran. Kami memanggil komponen pembawa yang dibahagikan ini "isyarat diterima dinormalkan." Kepekaan yang digerakkan dan nol dicipta oleh berat yang digunakan pada isyarat diterima yang dinormalkan dalam domain frekuensi. Kami memperoleh kaedah untuk menganggarkan berat untuk mencapai SINR maksimum dalam anggaran kelewatan yang juga termasuk pampasan untuk pengurangan panjang berat yang disebabkan oleh perkaitan antara komponen kelewatan. Keputusan simulasi menunjukkan bahawa kaedah cadangan kami tanpa sebarang maklumat mengenai kelewatan isyarat yang tidak diingini memberikan prestasi pengesanan yang mencukupi untuk sasaran biasa berbanding dengan yang konvensional.
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Salinan
Junji ASADA, Iwao SASASE, "Target Detection with MSN Algorithm for the Bistatic Radar Using Digital Terrestrial Broadcasting Signals" in IEICE TRANSACTIONS on Communications,
vol. E94-B, no. 2, pp. 515-525, February 2011, doi: 10.1587/transcom.E94.B.515.
Abstract: In bistatic radar, it is important to suppress the undesired signals such as the direct propagated signal from transmitter and its multipath components. Conventionally, some suppression methods have been proposed. They are categorized into the method using a feedback system and the method which subtracts the replicas of the undesired signals. The former method may have the problem on the convergence of the suppression performance. The latter method requires the precise delay times of the undesired signals. In this paper we propose a new method to detect the target in digital terrestrial TV-based bistatic radar which is based on orthogonal frequency division multiplexing (OFDM), without any information on the undesired signals' delay times. In the proposed method, we adapt a scheme based on maximum signal to noise ratio (MSN) algorithm, which makes signal to interference plus noise ratio (SINR) maximum for the desired signal component. The maximum sensitivity is steered so as to match the path that exhibits the delay which relates to the target position, as if the search beam is steered along the direction in array signal processing. In the proposed method, "nulls" are also formed for other delay components to be suppressed simultaneously. In the frequency domain, the carrier components of the scattered signal divided by those of the reference signal indicate the delays caused by scattering. We call these divided carrier components "normalized received signal." The steered sensitivity and nulls are created by the weight which is applied to the normalized received signal in the frequency domain. We obtain the method to estimate the weight to achieve the maximum SINR in the delay estimation which also includes the compensation for the reduction of the weight's length caused by decorrelation among the delay components. The simulation results show that our proposed method without any information on the undesired signal's delays provides sufficient detection performance for the typical target compared to the conventional one.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E94.B.515/_p
Salinan
@ARTICLE{e94-b_2_515,
author={Junji ASADA, Iwao SASASE, },
journal={IEICE TRANSACTIONS on Communications},
title={Target Detection with MSN Algorithm for the Bistatic Radar Using Digital Terrestrial Broadcasting Signals},
year={2011},
volume={E94-B},
number={2},
pages={515-525},
abstract={In bistatic radar, it is important to suppress the undesired signals such as the direct propagated signal from transmitter and its multipath components. Conventionally, some suppression methods have been proposed. They are categorized into the method using a feedback system and the method which subtracts the replicas of the undesired signals. The former method may have the problem on the convergence of the suppression performance. The latter method requires the precise delay times of the undesired signals. In this paper we propose a new method to detect the target in digital terrestrial TV-based bistatic radar which is based on orthogonal frequency division multiplexing (OFDM), without any information on the undesired signals' delay times. In the proposed method, we adapt a scheme based on maximum signal to noise ratio (MSN) algorithm, which makes signal to interference plus noise ratio (SINR) maximum for the desired signal component. The maximum sensitivity is steered so as to match the path that exhibits the delay which relates to the target position, as if the search beam is steered along the direction in array signal processing. In the proposed method, "nulls" are also formed for other delay components to be suppressed simultaneously. In the frequency domain, the carrier components of the scattered signal divided by those of the reference signal indicate the delays caused by scattering. We call these divided carrier components "normalized received signal." The steered sensitivity and nulls are created by the weight which is applied to the normalized received signal in the frequency domain. We obtain the method to estimate the weight to achieve the maximum SINR in the delay estimation which also includes the compensation for the reduction of the weight's length caused by decorrelation among the delay components. The simulation results show that our proposed method without any information on the undesired signal's delays provides sufficient detection performance for the typical target compared to the conventional one.},
keywords={},
doi={10.1587/transcom.E94.B.515},
ISSN={1745-1345},
month={February},}
Salinan
TY - JOUR
TI - Target Detection with MSN Algorithm for the Bistatic Radar Using Digital Terrestrial Broadcasting Signals
T2 - IEICE TRANSACTIONS on Communications
SP - 515
EP - 525
AU - Junji ASADA
AU - Iwao SASASE
PY - 2011
DO - 10.1587/transcom.E94.B.515
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E94-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2011
AB - In bistatic radar, it is important to suppress the undesired signals such as the direct propagated signal from transmitter and its multipath components. Conventionally, some suppression methods have been proposed. They are categorized into the method using a feedback system and the method which subtracts the replicas of the undesired signals. The former method may have the problem on the convergence of the suppression performance. The latter method requires the precise delay times of the undesired signals. In this paper we propose a new method to detect the target in digital terrestrial TV-based bistatic radar which is based on orthogonal frequency division multiplexing (OFDM), without any information on the undesired signals' delay times. In the proposed method, we adapt a scheme based on maximum signal to noise ratio (MSN) algorithm, which makes signal to interference plus noise ratio (SINR) maximum for the desired signal component. The maximum sensitivity is steered so as to match the path that exhibits the delay which relates to the target position, as if the search beam is steered along the direction in array signal processing. In the proposed method, "nulls" are also formed for other delay components to be suppressed simultaneously. In the frequency domain, the carrier components of the scattered signal divided by those of the reference signal indicate the delays caused by scattering. We call these divided carrier components "normalized received signal." The steered sensitivity and nulls are created by the weight which is applied to the normalized received signal in the frequency domain. We obtain the method to estimate the weight to achieve the maximum SINR in the delay estimation which also includes the compensation for the reduction of the weight's length caused by decorrelation among the delay components. The simulation results show that our proposed method without any information on the undesired signal's delays provides sufficient detection performance for the typical target compared to the conventional one.
ER -