Pub Date : 2011-06-26DOI: 10.1109/SPAWC.2011.5990487
E. Dall’Anese, J. Bazerque, Hao Zhu, G. Giannakis
The present paper develops a collaborative scheme whereby cognitive radios cooperate to localize active primary transmitters and reconstruct the power spectral density (PSD) maps (one per frequency band) portraying the power distribution across space. The sensing scheme relies on a parsimonious linear system model that accounts for the narrow-band nature of transmit-PSDs compared to the large swath of sensed frequencies, and for the group sparsity emerging when adopting a spatial grid of candidate primary user locations. Combining the merits of Lasso, group Lasso, and total least-squares (TLS), the proposed group sparse (GS) TLS approach yields hierarchically-sparse PSD estimates, and copes with model uncertainty induced by channel randomness and grid mismatch effects. Taking advantage of a novel low-complexity solver for the GS-Lasso, a block coordinate descent scheme is developed to solve the formulated GS-TLS problem. Simulations demonstrate the superior localization and PSD-estimation performance of GS-TLS compared to approaches that do not account for model uncertainties.
{"title":"Group sparse total least-squares for cognitive spectrum sensing","authors":"E. Dall’Anese, J. Bazerque, Hao Zhu, G. Giannakis","doi":"10.1109/SPAWC.2011.5990487","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990487","url":null,"abstract":"The present paper develops a collaborative scheme whereby cognitive radios cooperate to localize active primary transmitters and reconstruct the power spectral density (PSD) maps (one per frequency band) portraying the power distribution across space. The sensing scheme relies on a parsimonious linear system model that accounts for the narrow-band nature of transmit-PSDs compared to the large swath of sensed frequencies, and for the group sparsity emerging when adopting a spatial grid of candidate primary user locations. Combining the merits of Lasso, group Lasso, and total least-squares (TLS), the proposed group sparse (GS) TLS approach yields hierarchically-sparse PSD estimates, and copes with model uncertainty induced by channel randomness and grid mismatch effects. Taking advantage of a novel low-complexity solver for the GS-Lasso, a block coordinate descent scheme is developed to solve the formulated GS-TLS problem. Simulations demonstrate the superior localization and PSD-estimation performance of GS-TLS compared to approaches that do not account for model uncertainties.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121968138","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990418
P. Baracca, N. Benvenuto, L. Vangelista
Orthogonal frequency division multiplexing (OFDM) is a very popular modulation scheme because it requires a very simple receiver in transforming a frequency-selective channel into multiple flat-fading channels. Furthermore, multiple-input-multiple-output (MIMO) OFDM systems employing transmit diversity techniques, such as space-time (ST) and space-frequency (SF) coding, increase robustness and reliability over wireless fading channels. However, time-variation of the channel due to mobility disrupts orthogonality among subcarriers and yields intercarrier interference (ICI), limiting the performance of OFDM. In this paper we first recall a reduced-complexity technique to mitigate ICI in single-input-single-output (SISO) OFDM systems denoted per sub-block equalization (PSE) which operates on sub-blocks of the received OFDM symbol. Next we propose an extension of PSE to MIMO SF-OFDM systems. In particular, the Alamouti scheme is used in conjunction with PSE to combat ICI. Performance of the proposed scheme is evaluated for mobile digital video broadcasting DVB-T2 2 × 1 and 2 × 2 MIMO scenarios that suit with a possible extension to handheld devices in a next generation DVB-H. Numerical results show that the new receiver provides a gain from 21% to 33% with respect to the conventional OFDM receiver in terms of vehicular speed at which a target bit error rate can be maintained.
{"title":"A frequency domain pre-equalizer for MIMO-OFDM mobile communication systems employing alamouti coding","authors":"P. Baracca, N. Benvenuto, L. Vangelista","doi":"10.1109/SPAWC.2011.5990418","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990418","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is a very popular modulation scheme because it requires a very simple receiver in transforming a frequency-selective channel into multiple flat-fading channels. Furthermore, multiple-input-multiple-output (MIMO) OFDM systems employing transmit diversity techniques, such as space-time (ST) and space-frequency (SF) coding, increase robustness and reliability over wireless fading channels. However, time-variation of the channel due to mobility disrupts orthogonality among subcarriers and yields intercarrier interference (ICI), limiting the performance of OFDM. In this paper we first recall a reduced-complexity technique to mitigate ICI in single-input-single-output (SISO) OFDM systems denoted per sub-block equalization (PSE) which operates on sub-blocks of the received OFDM symbol. Next we propose an extension of PSE to MIMO SF-OFDM systems. In particular, the Alamouti scheme is used in conjunction with PSE to combat ICI. Performance of the proposed scheme is evaluated for mobile digital video broadcasting DVB-T2 2 × 1 and 2 × 2 MIMO scenarios that suit with a possible extension to handheld devices in a next generation DVB-H. Numerical results show that the new receiver provides a gain from 21% to 33% with respect to the conventional OFDM receiver in terms of vehicular speed at which a target bit error rate can be maintained.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117100550","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990436
Chung-Jung Huang, C. Wu, Ta-Sung Lee
In this paper, a novel decoder for underdetermined MIMO systems with low decoding complexity is proposed. The development of the proposed decoder consists of two stages. First, an improved slab decoding algorithm efficiently obtains all valid candidate points within a given slab. Next, a multi-slab based decoding algorithm finds the optimal solution by conducting intersections on the obtained candidate set with dynamic radius adaptation. The proposed decoder offers the advantages of low computational complexity and near-ML decoding performance for underdetermined MIMO systems. Simulation results indicate that it effectively reduces the complexity as compared to existing decoders, especially for large antenna numbers and/or constellations.
{"title":"Geometry based efficient decoding algorithms for underdetermined MIMO systems","authors":"Chung-Jung Huang, C. Wu, Ta-Sung Lee","doi":"10.1109/SPAWC.2011.5990436","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990436","url":null,"abstract":"In this paper, a novel decoder for underdetermined MIMO systems with low decoding complexity is proposed. The development of the proposed decoder consists of two stages. First, an improved slab decoding algorithm efficiently obtains all valid candidate points within a given slab. Next, a multi-slab based decoding algorithm finds the optimal solution by conducting intersections on the obtained candidate set with dynamic radius adaptation. The proposed decoder offers the advantages of low computational complexity and near-ML decoding performance for underdetermined MIMO systems. Simulation results indicate that it effectively reduces the complexity as compared to existing decoders, especially for large antenna numbers and/or constellations.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128090156","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990454
S. Soldado, J. Vieira, D. Albuquerque, Teofilo Monteiro
In this work we propose a Hybrid Filter Bank (HFB) design method with controlled reconstruction error. We show that this can be achieved if (i) the band-pass analog filters have a phase response that satisfy a given condition and (ii) the chosen delay for the HFB allows a correct approximation of the non-causal part of the digital synthesis filters impulse response. We are using this type of system to perform the analog to digital conversion of RF signals in a software defined radio front-end with a combined bandwidth / dynamic range beyond the current Analog to Digital Converters limits.
{"title":"Controlling the reconstruction error in Hybrid Filter Banks","authors":"S. Soldado, J. Vieira, D. Albuquerque, Teofilo Monteiro","doi":"10.1109/SPAWC.2011.5990454","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990454","url":null,"abstract":"In this work we propose a Hybrid Filter Bank (HFB) design method with controlled reconstruction error. We show that this can be achieved if (i) the band-pass analog filters have a phase response that satisfy a given condition and (ii) the chosen delay for the HFB allows a correct approximation of the non-causal part of the digital synthesis filters impulse response. We are using this type of system to perform the analog to digital conversion of RF signals in a software defined radio front-end with a combined bandwidth / dynamic range beyond the current Analog to Digital Converters limits.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131571834","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990410
S. Pfletschinger, D. Declercq
We consider the application of non-binary coding schemes to vector channels, in particular we apply q-ary LDPC codes to multiple-antenna transmission schemes. Based on the principle of providing a good equivalent channel to the coding scheme, we directly map the code symbols to the transmit signal and find some suitable multi-dimensional mappings. The performance is assessed by simulations and we find that non-binary coding with direct mapping provides a significant advantage over its binary counterpart and over some space-time diversity schemes.
{"title":"Non-binary coding for vector channels","authors":"S. Pfletschinger, D. Declercq","doi":"10.1109/SPAWC.2011.5990410","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990410","url":null,"abstract":"We consider the application of non-binary coding schemes to vector channels, in particular we apply q-ary LDPC codes to multiple-antenna transmission schemes. Based on the principle of providing a good equivalent channel to the coding scheme, we directly map the code symbols to the transmit signal and find some suitable multi-dimensional mappings. The performance is assessed by simulations and we find that non-binary coding with direct mapping provides a significant advantage over its binary counterpart and over some space-time diversity schemes.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131563581","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990414
Jiun-Hung Wang, Yuan Lin, Y. Su
We consider the problem of resource allocation and relay selection in an Orthogonal Frequency Division Multiple Access (OFDMA) based downlink network. We assume the availability of multiple cooperative relay stations but not the perfect channel state information (CSI). Instead, the base station knows only the estimated channel gain and the associated error distribution. Using a tight capacity lower bound (CLB) as the performance metric, we derive the optimal source and relay power allocation ratio that maximizes the CLB of a cascaded source-relay-destination link. Based on this power ratio, we propose a simple suboptimal algorithm that assigns power, subcarriers and cooperative relays to each mobile station. Simulation results show that our algorithm not only meets the users' rate constraints with very high probabilities but yields an excellent sum rate (CLB) performance.
{"title":"Resource allocation and relay selection for cooperative OFDMA networks with imperfect channel information","authors":"Jiun-Hung Wang, Yuan Lin, Y. Su","doi":"10.1109/SPAWC.2011.5990414","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990414","url":null,"abstract":"We consider the problem of resource allocation and relay selection in an Orthogonal Frequency Division Multiple Access (OFDMA) based downlink network. We assume the availability of multiple cooperative relay stations but not the perfect channel state information (CSI). Instead, the base station knows only the estimated channel gain and the associated error distribution. Using a tight capacity lower bound (CLB) as the performance metric, we derive the optimal source and relay power allocation ratio that maximizes the CLB of a cascaded source-relay-destination link. Based on this power ratio, we propose a simple suboptimal algorithm that assigns power, subcarriers and cooperative relays to each mobile station. Simulation results show that our algorithm not only meets the users' rate constraints with very high probabilities but yields an excellent sum rate (CLB) performance.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132714484","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990416
Gaurav Bafna, P. Banelli, L. Rugini
We propose a three-stage centralized spectrum sensing for cognitive radios in OFDM systems, where local decisions of cooperative sensors are combined at the fusion center. The fusion center, if necessary, can invoke a third stage for finer sensing. The first two stages employ distributed energy detectors and a centralized voting rule, while the third stage exploits the OFDM signal correlation. The overall probability of detection is optimized by jointly designing the optimal thresholds at the three stages, for a given probability of false alarm. The detection performance and the average sensing time are analyzed theoretically and compared by simulations with spectrum sensing that employs only the two-stage centralized detector or the correlation-based detector.
{"title":"Three-stage centralized spectrum sensing of OFDM signals","authors":"Gaurav Bafna, P. Banelli, L. Rugini","doi":"10.1109/SPAWC.2011.5990416","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990416","url":null,"abstract":"We propose a three-stage centralized spectrum sensing for cognitive radios in OFDM systems, where local decisions of cooperative sensors are combined at the fusion center. The fusion center, if necessary, can invoke a third stage for finer sensing. The first two stages employ distributed energy detectors and a centralized voting rule, while the third stage exploits the OFDM signal correlation. The overall probability of detection is optimized by jointly designing the optimal thresholds at the three stages, for a given probability of false alarm. The detection performance and the average sensing time are analyzed theoretically and compared by simulations with spectrum sensing that employs only the two-stage centralized detector or the correlation-based detector.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132366173","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990462
Rizwan Ghaffar, R. Knopp
A recent idea of exploiting the promised gains of multi-user MIMO for future cellular standards as LTE by intelligent interference aware receivers instead of suboptimal singleuser receivers is quite promising. However this detection strategy is based on the exploitation of the structure of interference which necessitates the knowledge of the constellation and precoder of the co-scheduled user equipment (UE). As the downlink control information (DCI) in LTE is devoid of this information, we look in this paper at the sensitivity of LTE's multi-user MIMO mode to the information of co-scheduled UE. We show that exploiting the discrete nature of interference in the absence of the exact knowledge of interference constellation has significant gains as compared to the suboptimal single-user detection. To this end, we propose a blind receiver for LTE which shows significantly improved performance as compared to single-user receivers and exhibits a minor degradation as compared to interference aware receivers.
{"title":"Interference sensitivity for multiuser MIMO in LTE","authors":"Rizwan Ghaffar, R. Knopp","doi":"10.1109/SPAWC.2011.5990462","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990462","url":null,"abstract":"A recent idea of exploiting the promised gains of multi-user MIMO for future cellular standards as LTE by intelligent interference aware receivers instead of suboptimal singleuser receivers is quite promising. However this detection strategy is based on the exploitation of the structure of interference which necessitates the knowledge of the constellation and precoder of the co-scheduled user equipment (UE). As the downlink control information (DCI) in LTE is devoid of this information, we look in this paper at the sensitivity of LTE's multi-user MIMO mode to the information of co-scheduled UE. We show that exploiting the discrete nature of interference in the absence of the exact knowledge of interference constellation has significant gains as compared to the suboptimal single-user detection. To this end, we propose a blind receiver for LTE which shows significantly improved performance as compared to single-user receivers and exhibits a minor degradation as compared to interference aware receivers.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"194 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134006275","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990442
S. Fakoorian, A. L. Swindlehurst
We study the Gaussian MISO wiretap channel with a transmitter, a legitimate receiver, an eavesdropper and an external helper, where the transmitter and the helper have an arbitrary number of antennas but the intended receiver and the eavesdropper have only one antenna. The transmitter sends confidential messages to its intended receiver, while the helper transmits jamming signals independent of the source message to confuse the eavesdropper. The jamming signal is assumed to be treated as noise at both the intended receiver and the eavesdropper. Assuming Gaussian signaling at the helper, we obtain the optimal beamformers at the transmitter and the helper that achieve the secrecy capacity.
{"title":"Secrecy capacity of MISO Gaussian wiretap channel with a cooperative jammer","authors":"S. Fakoorian, A. L. Swindlehurst","doi":"10.1109/SPAWC.2011.5990442","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990442","url":null,"abstract":"We study the Gaussian MISO wiretap channel with a transmitter, a legitimate receiver, an eavesdropper and an external helper, where the transmitter and the helper have an arbitrary number of antennas but the intended receiver and the eavesdropper have only one antenna. The transmitter sends confidential messages to its intended receiver, while the helper transmits jamming signals independent of the source message to confuse the eavesdropper. The jamming signal is assumed to be treated as noise at both the intended receiver and the eavesdropper. Assuming Gaussian signaling at the helper, we obtain the optimal beamformers at the transmitter and the helper that achieve the secrecy capacity.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212750","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 : 2011-06-26DOI: 10.1109/SPAWC.2011.5990386
M. R. Gholami, S. Gezici, E. Strom, M. Rydstrom
This paper addresses the problem of single node positioning in cooperative network using hybrid two-way time-of-arrival and time-difference-of-arrival where, the turn-around time at the target node is unknown. Considering the turn-around time as a nuisance parameter, the derived maximum likelihood estimator (MLE) brings a difficult global optimization problem due to local minima in the cost function of the MLE. To avoid drawbacks in solving the MLE, we obtain a linear two-step estimator using non-linear pre-processing which is algebraic and closed-form in each step. To compare different methods, Cramér-Rao lower bound (CRLB) is derived. Simulation results confirm that the proposed linear estimator attains the CRLB for sufficiently high signal-to-noise ratios.
{"title":"Positioning algorithms for cooperative networks in the presence of an unknown turn-around time","authors":"M. R. Gholami, S. Gezici, E. Strom, M. Rydstrom","doi":"10.1109/SPAWC.2011.5990386","DOIUrl":"https://doi.org/10.1109/SPAWC.2011.5990386","url":null,"abstract":"This paper addresses the problem of single node positioning in cooperative network using hybrid two-way time-of-arrival and time-difference-of-arrival where, the turn-around time at the target node is unknown. Considering the turn-around time as a nuisance parameter, the derived maximum likelihood estimator (MLE) brings a difficult global optimization problem due to local minima in the cost function of the MLE. To avoid drawbacks in solving the MLE, we obtain a linear two-step estimator using non-linear pre-processing which is algebraic and closed-form in each step. To compare different methods, Cramér-Rao lower bound (CRLB) is derived. Simulation results confirm that the proposed linear estimator attains the CRLB for sufficiently high signal-to-noise ratios.","PeriodicalId":102244,"journal":{"name":"2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116713649","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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