Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457897
Nate Goergen, T. Clancy, T. Newman
We present an authentication device allowing for the validation of wireless transmissions by means of a watermark signal applied at the physical layer, and demonstrate how the method may be applied to digital broadcast television signals. The novel watermarking approach presented conveys the authentication signal through explicit emulation of innocuous channel responses, further preventing Primary User Emulation attacks in Dynamic Spectrum Access theaters. The undesirable effects of the watermark signal design are removed by the receiver by traditional channel equalization practices, resulting in nearly zero impact to the bit error rate (BER) of the primary signal received. The proposed mechanism may be implemented without modification to existing Digital Television (DTV) transmission equipment using a retrofitting approach, and does not require the modification of existing receivers or protocols. A key benefit of the proposed method is that the authentication signal may be received at a BER much lower than the primary-signal, all within original transmission power and bandwidth constraints. We discuss physical layer details of the new watermarking method, and demonstrate how proven cryptographic authentication measures may be applied to the problem.
{"title":"Physical Layer Authentication Watermarks through Synthetic Channel Emulation","authors":"Nate Goergen, T. Clancy, T. Newman","doi":"10.1109/DYSPAN.2010.5457897","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457897","url":null,"abstract":"We present an authentication device allowing for the validation of wireless transmissions by means of a watermark signal applied at the physical layer, and demonstrate how the method may be applied to digital broadcast television signals. The novel watermarking approach presented conveys the authentication signal through explicit emulation of innocuous channel responses, further preventing Primary User Emulation attacks in Dynamic Spectrum Access theaters. The undesirable effects of the watermark signal design are removed by the receiver by traditional channel equalization practices, resulting in nearly zero impact to the bit error rate (BER) of the primary signal received. The proposed mechanism may be implemented without modification to existing Digital Television (DTV) transmission equipment using a retrofitting approach, and does not require the modification of existing receivers or protocols. A key benefit of the proposed method is that the authentication signal may be received at a BER much lower than the primary-signal, all within original transmission power and bandwidth constraints. We discuss physical layer details of the new watermarking method, and demonstrate how proven cryptographic authentication measures may be applied to the problem.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116866587","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457924
S. W. Oh, Yonghong Zeng, Weiqiang Zhang, Syed Naveen A. A., F. Chin
In November 2008, FCC approved unlicensed use of TV white space. This marks an important milestone in the reality of using cognitive radio for communication. In this demonstration, we show how spectrum sensing can effectively sense the presence or absence of the incumbent users. The vacant channels sensed can then be used for wireless communication such as wireless video streaming shown in this demonstration. At the same time, we will also show the difference in sensitivity using spectrum sensing and typical digital TV receiver. With successful demonstration of such system in real-world environment, it will give the much needed confidence in the capability of cognitive radio systems to detect the operation of primary users and protect their use of spectrum.
{"title":"TV White-Space Video Streaming Demo","authors":"S. W. Oh, Yonghong Zeng, Weiqiang Zhang, Syed Naveen A. A., F. Chin","doi":"10.1109/DYSPAN.2010.5457924","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457924","url":null,"abstract":"In November 2008, FCC approved unlicensed use of TV white space. This marks an important milestone in the reality of using cognitive radio for communication. In this demonstration, we show how spectrum sensing can effectively sense the presence or absence of the incumbent users. The vacant channels sensed can then be used for wireless communication such as wireless video streaming shown in this demonstration. At the same time, we will also show the difference in sensitivity using spectrum sensing and typical digital TV receiver. With successful demonstration of such system in real-world environment, it will give the much needed confidence in the capability of cognitive radio systems to detect the operation of primary users and protect their use of spectrum.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129619216","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457844
A. Kortun, T. Ratnarajah, M. Sellathurai, C. Zhong
In this paper, the distribution of the ratio of extreme eigenvalues of complex Wishart matrix is studied in order to calculate the exact decision threshold as a function of the desired probability of false alarm for maximum-minimum eigenvalue (MME) detection method for multiple receiver collaborative spectrum sensing. Furthermore, the proposed exact formulation is simplified for the case of two receiver based collaborative spectrum sensing and with finite number of samples. In addition, an approximate closed form formula of the exact threshold is derived in terms of a desired probability of false alarm for a special case having equal number of receive antennas and signal samples. Finally, using Monte-Carlo simulations, we verify the estimated values of exact decision threshold and their approximated closed-form values. The probability of detection performance has been verified using the proposed exact decision thresholds achieving significant performance gains compared to the performance of the asymptotic decision threshold.
{"title":"On the Performance of Eigenvalue-Based Spectrum Sensing for Cognitive Radio","authors":"A. Kortun, T. Ratnarajah, M. Sellathurai, C. Zhong","doi":"10.1109/DYSPAN.2010.5457844","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457844","url":null,"abstract":"In this paper, the distribution of the ratio of extreme eigenvalues of complex Wishart matrix is studied in order to calculate the exact decision threshold as a function of the desired probability of false alarm for maximum-minimum eigenvalue (MME) detection method for multiple receiver collaborative spectrum sensing. Furthermore, the proposed exact formulation is simplified for the case of two receiver based collaborative spectrum sensing and with finite number of samples. In addition, an approximate closed form formula of the exact threshold is derived in terms of a desired probability of false alarm for a special case having equal number of receive antennas and signal samples. Finally, using Monte-Carlo simulations, we verify the estimated values of exact decision threshold and their approximated closed-form values. The probability of detection performance has been verified using the proposed exact decision thresholds achieving significant performance gains compared to the performance of the asymptotic decision threshold.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129626619","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457921
P. Sutton, B. Ozgul, I. Macaluso, L. Doyle
In dynamic spectrum access networks (DySPANs), users share access to available spectrum while minimizing the likelihood of harmful interference. In this demonstration we present a dynamic spectrum access network which employs a reconfigurable orthogonal frequency-division multiplexing (OFDM) based waveform. In order to avoid the creation of harmful interference, the out-of-band (OOB) emissions of the waveform are dynamically tailored to the properties of spectrum neighbours through the use of OFDM pulse shaping. The demonstration network is built upon the highly reconfigurable Iris 2.0 software radio platform and illustrates the capabilities of this platform as well as the utility of OFDM pulse shaping in the context of dynamic spectrum access networks.
{"title":"OFDM Pulse-Shaped Waveforms for Dynamic Spectrum Access Networks","authors":"P. Sutton, B. Ozgul, I. Macaluso, L. Doyle","doi":"10.1109/DYSPAN.2010.5457921","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457921","url":null,"abstract":"In dynamic spectrum access networks (DySPANs), users share access to available spectrum while minimizing the likelihood of harmful interference. In this demonstration we present a dynamic spectrum access network which employs a reconfigurable orthogonal frequency-division multiplexing (OFDM) based waveform. In order to avoid the creation of harmful interference, the out-of-band (OOB) emissions of the waveform are dynamically tailored to the properties of spectrum neighbours through the use of OFDM pulse shaping. The demonstration network is built upon the highly reconfigurable Iris 2.0 software radio platform and illustrates the capabilities of this platform as well as the utility of OFDM pulse shaping in the context of dynamic spectrum access networks.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126541902","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457860
Tien Viet Nguyen, F. Baccelli
We propose a probabilistic model based on stochastic geometry to analyze cognitive radio in a mobile ad hoc network using carrier sensing multiple access. Analytical results are derived on the impact of the interaction between primary and secondary users on their medium access probability, coverage probability and throughput. These results give insight on the guarantees which can be offered to primary users and more generally on the possibilities offered by cognitive radio to improve the effectiveness of spectrum utilization in such networks.
{"title":"A Probabilistic Model of Carrier Sensing Based Cognitive Radio","authors":"Tien Viet Nguyen, F. Baccelli","doi":"10.1109/DYSPAN.2010.5457860","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457860","url":null,"abstract":"We propose a probabilistic model based on stochastic geometry to analyze cognitive radio in a mobile ad hoc network using carrier sensing multiple access. Analytical results are derived on the impact of the interaction between primary and secondary users on their medium access probability, coverage probability and throughput. These results give insight on the guarantees which can be offered to primary users and more generally on the possibilities offered by cognitive radio to improve the effectiveness of spectrum utilization in such networks.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121306142","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457876
Minseok Kim, Kimtho Po, J. Takada
Spectrum sensing is a key technical challenge for the cognitive radio (CR) technology which allows it to access the spectrum of the licensed systems without causing interference to them. It is well known that cyclostationarity detectors have a great advantage of the robustness of noise uncertainty which significantly degrades the performance and makes its implementation difficult in energy detectors. This paper pays attention to the fact that cyclostationarity detector can acheive diversity gain by manipulating multiple cyclic autocorrelation functions (CAFs). While most of combining schemes in cooperative sensing with multiple detectors require the signal to noise power ratio estimation which is impractical in low SNR regime, combining with multiple CAFs in single detector based on transmit signal characteristic can be used. In this paper, three detector schemes of selection combining (SC), equal gain combining (EGC) and maximum ratio combining (MRC) with multiple CAFs are evaluated in additive white Gaussian noise (AWGN) channel considering the OFDM signal of Japanese digital television broadcasting (ISDB-T) as a primary system. The numerical results will show that the cyclic detector based on MRC using several cyclic frequencies has the best detection performances even though EGC shows slightly worse performance in assumed condition.
{"title":"Performance Enhancement of Cyclostationarity Detector by Utilizing Multiple Cyclic Frequencies of OFDM Signals","authors":"Minseok Kim, Kimtho Po, J. Takada","doi":"10.1109/DYSPAN.2010.5457876","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457876","url":null,"abstract":"Spectrum sensing is a key technical challenge for the cognitive radio (CR) technology which allows it to access the spectrum of the licensed systems without causing interference to them. It is well known that cyclostationarity detectors have a great advantage of the robustness of noise uncertainty which significantly degrades the performance and makes its implementation difficult in energy detectors. This paper pays attention to the fact that cyclostationarity detector can acheive diversity gain by manipulating multiple cyclic autocorrelation functions (CAFs). While most of combining schemes in cooperative sensing with multiple detectors require the signal to noise power ratio estimation which is impractical in low SNR regime, combining with multiple CAFs in single detector based on transmit signal characteristic can be used. In this paper, three detector schemes of selection combining (SC), equal gain combining (EGC) and maximum ratio combining (MRC) with multiple CAFs are evaluated in additive white Gaussian noise (AWGN) channel considering the OFDM signal of Japanese digital television broadcasting (ISDB-T) as a primary system. The numerical results will show that the cyclic detector based on MRC using several cyclic frequencies has the best detection performances even though EGC shows slightly worse performance in assumed condition.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116571083","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457896
A. M. Kuzminskiy, Y. Abramovich
Decentralized dynamic spectrum allocation (DSA) that exploits adaptive antenna array interference mitigation (IM) diversity at the receiver, is addressed in interference limited environment with high level of frequency reuse. The system consists of base stations (BSs) that may belong to different providers in license-exempt spectrum, who can optimize uplink frequency allocation to their subscriber stations (SSs) to achieve the least impact of IM on the useful signal, assuming no control over band allocation of other BSs sharing the same bands. Mixed "selfish"/"good neighbor" DSA networks are studied by means of Markov chain analysis and simulations. The obtained quantitative results on the rule-breaks effect in the rule-regulated networks can be useful for development of spectrum sharing incentives and regulations.
{"title":"Rule-Breaks Effect on Decentralized Rule-Regulated \"Good Neighbor\" DSA Based on Adaptive Antenna Array Interference Mitigation Diversity","authors":"A. M. Kuzminskiy, Y. Abramovich","doi":"10.1109/DYSPAN.2010.5457896","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457896","url":null,"abstract":"Decentralized dynamic spectrum allocation (DSA) that exploits adaptive antenna array interference mitigation (IM) diversity at the receiver, is addressed in interference limited environment with high level of frequency reuse. The system consists of base stations (BSs) that may belong to different providers in license-exempt spectrum, who can optimize uplink frequency allocation to their subscriber stations (SSs) to achieve the least impact of IM on the useful signal, assuming no control over band allocation of other BSs sharing the same bands. Mixed \"selfish\"/\"good neighbor\" DSA networks are studied by means of Markov chain analysis and simulations. The obtained quantitative results on the rule-breaks effect in the rule-regulated networks can be useful for development of spectrum sharing incentives and regulations.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122478115","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457842
J. Sydor, A. Ghasemi, S. Palaninathan, W. Wong
Recently, the topic of cognitive radio has spurred a lot of interest within both academic and regulatory circles. Cognitive radios are envisioned to be capable of improving spectrum utilization as well as coexistence among wireless networks. However, a relatively low-cost research platform for implementation and demonstration of cognitive radio concepts in a typical wireless network scenario is still lacking. To address this issue, we have developed the CORAL platform which modifies the operation of low-cost wireless devices to collectively perform the essential tasks of a cognitive radio network such as radio environment awareness, white space selection, and co-channel interference avoidance. This demonstration will showcase the CORAL platform and its main cognitive radio features.
{"title":"Cognitive, Radio-Aware, Low-Cost (CORAL) Research Platform","authors":"J. Sydor, A. Ghasemi, S. Palaninathan, W. Wong","doi":"10.1109/DYSPAN.2010.5457842","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457842","url":null,"abstract":"Recently, the topic of cognitive radio has spurred a lot of interest within both academic and regulatory circles. Cognitive radios are envisioned to be capable of improving spectrum utilization as well as coexistence among wireless networks. However, a relatively low-cost research platform for implementation and demonstration of cognitive radio concepts in a typical wireless network scenario is still lacking. To address this issue, we have developed the CORAL platform which modifies the operation of low-cost wireless devices to collectively perform the essential tasks of a cognitive radio network such as radio environment awareness, white space selection, and co-channel interference avoidance. This demonstration will showcase the CORAL platform and its main cognitive radio features.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133994534","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457872
Y. Selén, Jonas Kronander
In this article the effect of licensed non-standardized low power transmitters, i.e., PMSE (programme making special event) devices such as wireless microphones, on secondary usage of TV white space is considered. In particular, the performance for energy detection of these devices is studied under realistic fading and interference situations. One motivation for using energy detection is that PMSE devices are not standardized and, hence, there are few common signal properties that can be exploited when trying to detect them. Further, a novel semi-analytical approach based on single sensor detection performance as a function of distance is developed and shown to accurately predict cooperative sensing performance. The conclusion from the study is that it is sometimes very challenging to accurately detect the presence of PMSE devices. Many spectrum opportunities at times needs to be sacrificed in order to guarantee a low probability of interference.
{"title":"Cooperative Detection of Programme Making Special Event Devices in Realistic Fading Environments","authors":"Y. Selén, Jonas Kronander","doi":"10.1109/DYSPAN.2010.5457872","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457872","url":null,"abstract":"In this article the effect of licensed non-standardized low power transmitters, i.e., PMSE (programme making special event) devices such as wireless microphones, on secondary usage of TV white space is considered. In particular, the performance for energy detection of these devices is studied under realistic fading and interference situations. One motivation for using energy detection is that PMSE devices are not standardized and, hence, there are few common signal properties that can be exploited when trying to detect them. Further, a novel semi-analytical approach based on single sensor detection performance as a function of distance is developed and shown to accurately predict cooperative sensing performance. The conclusion from the study is that it is sometimes very challenging to accurately detect the presence of PMSE devices. Many spectrum opportunities at times needs to be sacrificed in order to guarantee a low probability of interference.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132194283","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 : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457864
K. Jitvanichphaibool, Ying-Chang Liang, Yonghong Zeng
This paper is interested in spectrum sensing using multiple antennas under spatially and temporally correlated noise environments. We exploit cyclostationary features of the primary user's signal in terms of cyclic spectral coherence function and the proposed modified cyclic spectral density function, which has less computational complexity. Two types of detectors are proposed: pre-combining and post-combining detectors. For pre-combining method, a blind maximum ratio combining technique is considered. All detectors are designed to handle noise uncertainty and also be effective in both white noise and colored noise scenarios. Numerical results are given to illustrate the performance of all detectors and verify their efficiency against the noise correlation effect. With the use of estimated channels, pre-combining detectors are superior to post-combining detectors, which do not require channel information. It is also shown that the modified cyclic spectral density function achieves comparable performance to the cyclic spectral coherence function.
{"title":"Spectrum Sensing Using Multiple Antennas for Spatially and Temporally Correlated Noise Environments","authors":"K. Jitvanichphaibool, Ying-Chang Liang, Yonghong Zeng","doi":"10.1109/DYSPAN.2010.5457864","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457864","url":null,"abstract":"This paper is interested in spectrum sensing using multiple antennas under spatially and temporally correlated noise environments. We exploit cyclostationary features of the primary user's signal in terms of cyclic spectral coherence function and the proposed modified cyclic spectral density function, which has less computational complexity. Two types of detectors are proposed: pre-combining and post-combining detectors. For pre-combining method, a blind maximum ratio combining technique is considered. All detectors are designed to handle noise uncertainty and also be effective in both white noise and colored noise scenarios. Numerical results are given to illustrate the performance of all detectors and verify their efficiency against the noise correlation effect. With the use of estimated channels, pre-combining detectors are superior to post-combining detectors, which do not require channel information. It is also shown that the modified cyclic spectral density function achieves comparable performance to the cyclic spectral coherence function.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":"13 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117265835","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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