In synthetic aperture radar (SAR), low scene-contrast may invalidate most of the existing autofocus methods, and the limited autofocus performance is also difficult to verify. Based on a parametric statistical signal model in the coherent processing interval (CPI) of SAR, a novel SAR autofocus method is developed and it is especially applicable to extremely low-contrast scenes. Furthermore, the limitation of CPI length and the Cramer-Rao low bound of the autofocus parameter estimation are all analytically obtained. Finally, real measurement data is also exploited to validate the proposed model and the new method.
{"title":"A novel parametric SAR autofocus method","authors":"Jia Xu, Yingning Peng, Liping Zhang, Yin-shen Lin, Xianggen Xia","doi":"10.1109/NRC.2004.1316394","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316394","url":null,"abstract":"In synthetic aperture radar (SAR), low scene-contrast may invalidate most of the existing autofocus methods, and the limited autofocus performance is also difficult to verify. Based on a parametric statistical signal model in the coherent processing interval (CPI) of SAR, a novel SAR autofocus method is developed and it is especially applicable to extremely low-contrast scenes. Furthermore, the limitation of CPI length and the Cramer-Rao low bound of the autofocus parameter estimation are all analytically obtained. Finally, real measurement data is also exploited to validate the proposed model and the new method.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124458755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316400
D. Scholnik, Jeffrey O. Coleman, Donald Bowling, Michael Neel
Future array-based RF transmit systems will require linear amplification to preserve the spectral integrity of simultaneously transmitted signals. Classical delta-sigma modulation, paired with an emerging class of high-power switches, can provide this linearity by using a high-speed, low-resolution quantizer and shaping the resulting quantization errors out of the signal band. The drawback is that high clock rates are required to achieve high SNR. Recently, we have proposed shaping quantization errors jointly in temporal and spatial frequency, pushing quantization errors both out of band and to nonpropagating spatial frequencies. This provides greater SNR for a given clock rate or the same SNR at a reduced clock rate relative to conventional delta-sigma modulation, while retaining its characteristic high linearity. We present an overview of the spatio-temporal delta-sigma array architecture and present the results of some preliminary hardware experiments with a small linear array.
{"title":"Spatio-temporal delta-sigma modulation for shared wideband transmit arrays","authors":"D. Scholnik, Jeffrey O. Coleman, Donald Bowling, Michael Neel","doi":"10.1109/NRC.2004.1316400","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316400","url":null,"abstract":"Future array-based RF transmit systems will require linear amplification to preserve the spectral integrity of simultaneously transmitted signals. Classical delta-sigma modulation, paired with an emerging class of high-power switches, can provide this linearity by using a high-speed, low-resolution quantizer and shaping the resulting quantization errors out of the signal band. The drawback is that high clock rates are required to achieve high SNR. Recently, we have proposed shaping quantization errors jointly in temporal and spatial frequency, pushing quantization errors both out of band and to nonpropagating spatial frequencies. This provides greater SNR for a given clock rate or the same SNR at a reduced clock rate relative to conventional delta-sigma modulation, while retaining its characteristic high linearity. We present an overview of the spatio-temporal delta-sigma array architecture and present the results of some preliminary hardware experiments with a small linear array.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116962587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316483
J. A. Russ, D. Casbeer, A. Swindlehurst
Application of space-time adaptive processing (STAP) in real situations requires dimension-reducing methods. This is due to both the large computational cost involved in calculating the interference statistics and the smaller number of stationary training samples available to estimate the clutter covariance. Recently, auto-regressive (AR) filtering techniques have been used to help reduce computation and secondary sample support requirements in STAP scenarios. We compare the detection performance of several AR-based algorithms with more standard GLRT-type approaches. In particular, we consider the parametric amplitude matched filter (PAMF) and the space-time autoregressive filter (STAR), and show that they outperform standard GLR tests, especially in challenging situations with low sample support. Among the parametric methods considered, the STAR approach provides the most robust overall performance.
{"title":"STAP detection using space-time autoregressive filtering","authors":"J. A. Russ, D. Casbeer, A. Swindlehurst","doi":"10.1109/NRC.2004.1316483","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316483","url":null,"abstract":"Application of space-time adaptive processing (STAP) in real situations requires dimension-reducing methods. This is due to both the large computational cost involved in calculating the interference statistics and the smaller number of stationary training samples available to estimate the clutter covariance. Recently, auto-regressive (AR) filtering techniques have been used to help reduce computation and secondary sample support requirements in STAP scenarios. We compare the detection performance of several AR-based algorithms with more standard GLRT-type approaches. In particular, we consider the parametric amplitude matched filter (PAMF) and the space-time autoregressive filter (STAR), and show that they outperform standard GLR tests, especially in challenging situations with low sample support. Among the parametric methods considered, the STAR approach provides the most robust overall performance.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116164034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316484
S. Daka, P. Kalata, P. L. Rawicz, T. Chmielewski
The paper considers the discrete time Kalman and H/sub /spl infin// approach to the two-state /spl alpha/-/spl beta/ target tracking problem. A closed form steady-state solution for the /spl alpha/-/spl beta/ parameter selection for H/sub /spl infin// tracker, which is similar to the tracking index process for the MSE (Kalman) criterion, is presented. The H/sub /spl infin// and Kalman processes model the radar/target system with the objective of keeping the target within the radar beamwidth. The two trackers are compared considering two cases that differ in input maneuver disturbances, random maneuver and constant acceleration. An example illustrates the performance of the /spl alpha/-/spl beta/ tracker with respect to keeping the target within the beamwidth in terms of probability of escape.
{"title":"On /spl alpha/-/spl beta/ target tracking: the probability of target escape","authors":"S. Daka, P. Kalata, P. L. Rawicz, T. Chmielewski","doi":"10.1109/NRC.2004.1316484","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316484","url":null,"abstract":"The paper considers the discrete time Kalman and H/sub /spl infin// approach to the two-state /spl alpha/-/spl beta/ target tracking problem. A closed form steady-state solution for the /spl alpha/-/spl beta/ parameter selection for H/sub /spl infin// tracker, which is similar to the tracking index process for the MSE (Kalman) criterion, is presented. The H/sub /spl infin// and Kalman processes model the radar/target system with the objective of keeping the target within the radar beamwidth. The two trackers are compared considering two cases that differ in input maneuver disturbances, random maneuver and constant acceleration. An example illustrates the performance of the /spl alpha/-/spl beta/ tracker with respect to keeping the target within the beamwidth in terms of probability of escape.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125966659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316437
J. Bergin, C. M. Teixeira, P. Techau, J. Guerci
This paper presents a framework for incorporating knowledge sources directly in the space-time beamformer of airborne adaptive radars. The algorithm derivation follows the usual linearly constrained minimum-variance (LCMV) space-time beamformer with additional constraints based on a model of the clutter covariance matrix that is computed using available knowledge about the operating environment. This technique has the desirable property of reducing sample support requirements by "blending" the information contained in the observed radar data and the a priori knowledge sources. Applications of the technique to both full degree-of-freedom (DoF) and reduced DoF beamformer algorithms are considered. The performance of the knowledge-aided beamforming techniques are demonstrated using high-fidelity X-band radar simulation data.
{"title":"STAP with knowledge-aided data pre-whitening","authors":"J. Bergin, C. M. Teixeira, P. Techau, J. Guerci","doi":"10.1109/NRC.2004.1316437","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316437","url":null,"abstract":"This paper presents a framework for incorporating knowledge sources directly in the space-time beamformer of airborne adaptive radars. The algorithm derivation follows the usual linearly constrained minimum-variance (LCMV) space-time beamformer with additional constraints based on a model of the clutter covariance matrix that is computed using available knowledge about the operating environment. This technique has the desirable property of reducing sample support requirements by \"blending\" the information contained in the observed radar data and the a priori knowledge sources. Applications of the technique to both full degree-of-freedom (DoF) and reduced DoF beamformer algorithms are considered. The performance of the knowledge-aided beamforming techniques are demonstrated using high-fidelity X-band radar simulation data.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125863156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316414
J. Grajal, A. Asensio, L. Requejo
This paper presents a modification of a linear frequency modulation-continuous waveform shipborne surveillance radar (Perez et al. (2002)) with two antennas to transform it into airport surface detection equipment with a single antenna. The most important additional subsystem for this new equipment is a reflected power canceller to overcome the problem of insufficient isolation between the transmitter and receiver due to imperfect matching between the transmitter and the antenna. This system is currently being developed by the Spanish company Indra Sistemas SA in co-operation with the Technical University of Madrid.
本文提出了对双天线线性调频-连续波形舰载监视雷达(Perez et al.(2002))的改进，将其转化为单天线的机场水面探测设备。这种新设备最重要的附加子系统是一个反射功率抵消器，以克服由于发射机和天线之间不完全匹配而导致的发射机和接收机之间隔离不足的问题。该系统目前由西班牙公司Indra Sistemas SA与马德里技术大学合作开发。
{"title":"From a high-resolution LFM-CW shipborne radar to an airport surface detection equipment","authors":"J. Grajal, A. Asensio, L. Requejo","doi":"10.1109/NRC.2004.1316414","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316414","url":null,"abstract":"This paper presents a modification of a linear frequency modulation-continuous waveform shipborne surveillance radar (Perez et al. (2002)) with two antennas to transform it into airport surface detection equipment with a single antenna. The most important additional subsystem for this new equipment is a reflected power canceller to overcome the problem of insufficient isolation between the transmitter and receiver due to imperfect matching between the transmitter and the antenna. This system is currently being developed by the Spanish company Indra Sistemas SA in co-operation with the Technical University of Madrid.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124919109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316424
S.D. Fisher, M. Richards, G. Showman
Basic turntable spotlight inverse synthetic aperture radar (ISAR) systems that employ stepped frequency waveforms implement image formation algorithms based on the premise that data collection over uniform frequency and angle steps results in a rectangular sampling of the image spatial frequency (k-space) domain. As a result, a simple image formation algorithm implementing only a computationally efficient inverse 2D discrete Fourier transform (DFT) may be realized. However, this approach imposes limitations on resolution and/or scene size since the conventional data collection procedure actually results in a polar sampling of k-space, invalidating the rectangular grid assumption. This paper introduces a new data collection scheme using stepped frequency waveforms that are nonuniformly stepped in time and frequency so as to collect sample points according to the desired k-space shape. This procedure allows the use of a single inverse 2D DFT as the image formation algorithm, thereby reducing traditional constraints on resolution and scene size while maintaining good image focus and reducing computational complexity.
{"title":"An inverse polar format algorithm for turntable spotlight ISAR imaging systems using stepped frequency waveforms","authors":"S.D. Fisher, M. Richards, G. Showman","doi":"10.1109/NRC.2004.1316424","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316424","url":null,"abstract":"Basic turntable spotlight inverse synthetic aperture radar (ISAR) systems that employ stepped frequency waveforms implement image formation algorithms based on the premise that data collection over uniform frequency and angle steps results in a rectangular sampling of the image spatial frequency (k-space) domain. As a result, a simple image formation algorithm implementing only a computationally efficient inverse 2D discrete Fourier transform (DFT) may be realized. However, this approach imposes limitations on resolution and/or scene size since the conventional data collection procedure actually results in a polar sampling of k-space, invalidating the rectangular grid assumption. This paper introduces a new data collection scheme using stepped frequency waveforms that are nonuniformly stepped in time and frequency so as to collect sample points according to the desired k-space shape. This procedure allows the use of a single inverse 2D DFT as the image formation algorithm, thereby reducing traditional constraints on resolution and scene size while maintaining good image focus and reducing computational complexity.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125182409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316462
P.E. Cahill, K. Gerlach, F.C. Li
Classical methods of performing sidelobe cancellation include an approach whereby the main and auxiliary channels are divided into a prescribed number of contiguous subbands. This is known as a band-partitioned (BP) sidelobe canceler (SLC). A method of BP sidelobe cancellation using wavelet packets (WP) has been developed. The use of a wavelet packet decomposition is a simple, well-defined way to implement a paraunitary tree-structured filter bank. The performance of this method is compared to the method used in Lin et al. (2003), which is a special case of a uniform DFT filter bank. It is shown that the WP analysis filters provide better separation between adjacent narrowband channels, leading to an increase in performance of the BP SLC algorithm.
{"title":"A method of sidelobe cancellation using wavelet packets","authors":"P.E. Cahill, K. Gerlach, F.C. Li","doi":"10.1109/NRC.2004.1316462","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316462","url":null,"abstract":"Classical methods of performing sidelobe cancellation include an approach whereby the main and auxiliary channels are divided into a prescribed number of contiguous subbands. This is known as a band-partitioned (BP) sidelobe canceler (SLC). A method of BP sidelobe cancellation using wavelet packets (WP) has been developed. The use of a wavelet packet decomposition is a simple, well-defined way to implement a paraunitary tree-structured filter bank. The performance of this method is compared to the method used in Lin et al. (2003), which is a special case of a uniform DFT filter bank. It is shown that the WP analysis filters provide better separation between adjacent narrowband channels, leading to an increase in performance of the BP SLC algorithm.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126458294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316410
H. Faust, B. Connolly, T. Firestone, R. Chen, B. Cantrell, E. Mokole
Navy radar operations are being curtailed in a littoral environment. This is due to two factors: the encroachment of cell phone systems into the naval radar bands; in-band interference from other radars. The spectral width of most pulsed radars is significantly wider than necessary with present modulation schemes. Most radars utilize some form of constant envelope pulse with phase or frequency modulation. This causes the spectrum to broaden to several times the information bandwidth. If both the amplitude and phase of the transmitted signal are allowed to change, a significantly narrower bandwidth can be achieved. The paper presents a method to create waveforms with instantaneous bandwidths of 20 MHz confined within -100 dB. The theoretical spectral results of three popular phase modulation schemes (phase shift keying, minimum phase shift keying and derivative phase shift keying) are compared with the spectrally clean results. In addition, the Chireix out-phasing method is presented as an alternative to generating amplitude and phase modulated waveforms. The Chireix method provides a way of improving the efficiency compared to the conventional class A power amplifier. Preliminary results are shown for a spectrally clean waveform.
{"title":"A spectrally clean transmitting system for solid-state phased-array radars","authors":"H. Faust, B. Connolly, T. Firestone, R. Chen, B. Cantrell, E. Mokole","doi":"10.1109/NRC.2004.1316410","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316410","url":null,"abstract":"Navy radar operations are being curtailed in a littoral environment. This is due to two factors: the encroachment of cell phone systems into the naval radar bands; in-band interference from other radars. The spectral width of most pulsed radars is significantly wider than necessary with present modulation schemes. Most radars utilize some form of constant envelope pulse with phase or frequency modulation. This causes the spectrum to broaden to several times the information bandwidth. If both the amplitude and phase of the transmitted signal are allowed to change, a significantly narrower bandwidth can be achieved. The paper presents a method to create waveforms with instantaneous bandwidths of 20 MHz confined within -100 dB. The theoretical spectral results of three popular phase modulation schemes (phase shift keying, minimum phase shift keying and derivative phase shift keying) are compared with the spectrally clean results. In addition, the Chireix out-phasing method is presented as an alternative to generating amplitude and phase modulated waveforms. The Chireix method provides a way of improving the efficiency compared to the conventional class A power amplifier. Preliminary results are shown for a spectrally clean waveform.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"265 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129876442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-26DOI: 10.1109/NRC.2004.1316429
K. J. Anderson, J. Ward, R. O'Donnell
This paper presents an analysis of the Doppler processing technology currently in use in the USA's terminal airport surveillance radars, and examines possibilities for performance improvement, particularly in the presence of moving clutter. The research focuses on five- and eight-pulse waveform methodologies and their respective detection capabilities given clearly defined rain clutter scenarios. Performance with fixed coefficient filters similar to those used in the existing radars is calculated, followed by performance using an adaptive Doppler filtering technique. Performance is quantified in terms of signal-to-interference ratio at the output of the Doppler filters and resultant probability of detection given a specified probability of false alarm. The results show that a substantial improvement in detection in the vicinity of rain clutter is realized for both the five- and eight-pulse waveforms when using the adaptive coefficient Doppler filters as compared to the performance observed with the fixed coefficient filters. For constant filter weights, the eight-pulse Doppler filters give significantly better performance in most diverse rain clutter than the five-pulse Doppler filters.
{"title":"Adaptive Doppler filtering applied to modern air traffic control radars","authors":"K. J. Anderson, J. Ward, R. O'Donnell","doi":"10.1109/NRC.2004.1316429","DOIUrl":"https://doi.org/10.1109/NRC.2004.1316429","url":null,"abstract":"This paper presents an analysis of the Doppler processing technology currently in use in the USA's terminal airport surveillance radars, and examines possibilities for performance improvement, particularly in the presence of moving clutter. The research focuses on five- and eight-pulse waveform methodologies and their respective detection capabilities given clearly defined rain clutter scenarios. Performance with fixed coefficient filters similar to those used in the existing radars is calculated, followed by performance using an adaptive Doppler filtering technique. Performance is quantified in terms of signal-to-interference ratio at the output of the Doppler filters and resultant probability of detection given a specified probability of false alarm. The results show that a substantial improvement in detection in the vicinity of rain clutter is realized for both the five- and eight-pulse waveforms when using the adaptive coefficient Doppler filters as compared to the performance observed with the fixed coefficient filters. For constant filter weights, the eight-pulse Doppler filters give significantly better performance in most diverse rain clutter than the five-pulse Doppler filters.","PeriodicalId":268965,"journal":{"name":"Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116338725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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