Pub Date : 2013-11-14DOI: 10.1109/ICUWB.2013.6663819
Manato Horiba, E. Okamoto, T. Shinohara, Katsuhiko Matsumura
Collecting location information of persons or things in sensor networks enables a variety of services and applications. For such location information, time of arrival (TOA) or angle of arrival (AOA) of radio waves is often used. Moreover, a hybrid use of them, called hybrid-TOA/AOA (HTA), has also been proposed for performance improvement. However, when the direct wave is blocked by obstacles in the non-line-of-sight (NLOS) environment, the estimation accuracy is severely deteriorated. To coordinate this problem, an iterative minimum residual (IMR) scheme has been proposed for TOA-based estimation. In the IMR scheme, the NLOS nodes are sequentially detected and eliminated, and the estimation performance is improved. However, the IMR scheme for HTA measurements has not been considered. Therefore, in this paper, we propose a new NLOS detection scheme based on IMR scheme for HTA localization and evaluate its improved performances by computer simulations.
{"title":"An improved NLOS detection scheme for hybrid-TOA/AOA-based localization in indoor environments","authors":"Manato Horiba, E. Okamoto, T. Shinohara, Katsuhiko Matsumura","doi":"10.1109/ICUWB.2013.6663819","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663819","url":null,"abstract":"Collecting location information of persons or things in sensor networks enables a variety of services and applications. For such location information, time of arrival (TOA) or angle of arrival (AOA) of radio waves is often used. Moreover, a hybrid use of them, called hybrid-TOA/AOA (HTA), has also been proposed for performance improvement. However, when the direct wave is blocked by obstacles in the non-line-of-sight (NLOS) environment, the estimation accuracy is severely deteriorated. To coordinate this problem, an iterative minimum residual (IMR) scheme has been proposed for TOA-based estimation. In the IMR scheme, the NLOS nodes are sequentially detected and eliminated, and the estimation performance is improved. However, the IMR scheme for HTA measurements has not been considered. Therefore, in this paper, we propose a new NLOS detection scheme based on IMR scheme for HTA localization and evaluate its improved performances by computer simulations.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"62 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120923202","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663815
M. Iqbal, Y. Ge, K. Esselle
This paper presents the design of an antenna with small footprint, small volume and full ground plane for ultrawideband (UWB) systems. The design consists of two different dielectric segments, which reside above a ground plane, and is excited by a small metallic patch connected to a coaxial probe. The selected dielectric resonator (DR) bandwidth is enhanced by removing some dielectric and forming an air cavity within the structure. The volume of proposed DRA is also reduced by adding a finite planar conducting wall. A full ground plane is used to ensure that most of the power radiates to upper hemisphere. The proposed DRA with good radiation characteristics offers a simulated bandwidth of 68% between 4.6 and 9.3 GHz with |S11| <; -10 dB.
{"title":"An antenna with small footprint, small volume and full ground plane for UWB systems","authors":"M. Iqbal, Y. Ge, K. Esselle","doi":"10.1109/ICUWB.2013.6663815","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663815","url":null,"abstract":"This paper presents the design of an antenna with small footprint, small volume and full ground plane for ultrawideband (UWB) systems. The design consists of two different dielectric segments, which reside above a ground plane, and is excited by a small metallic patch connected to a coaxial probe. The selected dielectric resonator (DR) bandwidth is enhanced by removing some dielectric and forming an air cavity within the structure. The volume of proposed DRA is also reduced by adding a finite planar conducting wall. A full ground plane is used to ensure that most of the power radiates to upper hemisphere. The proposed DRA with good radiation characteristics offers a simulated bandwidth of 68% between 4.6 and 9.3 GHz with |S11| <; -10 dB.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129568668","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663865
Qi Zhang, J. Qin, A. Nallanathan
For impulse radio communications, the coherent Rake receiver requires accurate time acquisition and channel estimation whereas the autocorrelation receiver (AcR) requires a wideband analog delay element which has high complexity. In this paper, we propose a modified compressive sensing (CS) based receiver to avoid the stringent time acquisition, channel estimation and complicated wideband analog delay element. Different from the conventional CS algorithms, the proposed receiver modifies the randomly generated base functions according to channel statistics and simplifies the ℓ1 norm minimization as to form the detection template by combining several base functions which have larger correlation coefficients with the received signal. Furthermore, the received signal is demodulated by a symbol rate sampling at the proposed receiver. Computer simulation results show that the proposed receiver outperforms the Rake receiver with 8 fingers and AcR.
{"title":"Modified compressive sensing based receiver for impulse radio communications in UWB channels","authors":"Qi Zhang, J. Qin, A. Nallanathan","doi":"10.1109/ICUWB.2013.6663865","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663865","url":null,"abstract":"For impulse radio communications, the coherent Rake receiver requires accurate time acquisition and channel estimation whereas the autocorrelation receiver (AcR) requires a wideband analog delay element which has high complexity. In this paper, we propose a modified compressive sensing (CS) based receiver to avoid the stringent time acquisition, channel estimation and complicated wideband analog delay element. Different from the conventional CS algorithms, the proposed receiver modifies the randomly generated base functions according to channel statistics and simplifies the ℓ1 norm minimization as to form the detection template by combining several base functions which have larger correlation coefficients with the received signal. Furthermore, the received signal is demodulated by a symbol rate sampling at the proposed receiver. Computer simulation results show that the proposed receiver outperforms the Rake receiver with 8 fingers and AcR.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133640978","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663837
Yiyin Wang, Xiaoli Ma, Qi Zhou
Ultra wideband (UWB) signals facilitate efficient spectrum usage via coexistence with other narrowband signals. The detection of UWB signals under the coexistent narrowband signals is extremely important for UWB commercial and military purposes. Inherent cyclostationarity of the UWB signals provides unique features different from those of narrowband signals. In this paper, we investigate the cyclic features of a generalized UWB impulse radio (IR) signal. In order to detect UWB IRs under the existence of a narrowband signal (e.g. a GMSK signal), we explore both the nonconjugate and the conjugate cyclostationarity. A multi-cycle detector is proposed in time-domain making use of the conjugate cyclic autocorrelation to detect the UWB signal under the existence of the GMSK signal. The simulation results indicate the possibility to detect the UWB signal which is overwhelmed by the GMSK signal.
{"title":"Detecting UWB signals using cyclic features","authors":"Yiyin Wang, Xiaoli Ma, Qi Zhou","doi":"10.1109/ICUWB.2013.6663837","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663837","url":null,"abstract":"Ultra wideband (UWB) signals facilitate efficient spectrum usage via coexistence with other narrowband signals. The detection of UWB signals under the coexistent narrowband signals is extremely important for UWB commercial and military purposes. Inherent cyclostationarity of the UWB signals provides unique features different from those of narrowband signals. In this paper, we investigate the cyclic features of a generalized UWB impulse radio (IR) signal. In order to detect UWB IRs under the existence of a narrowband signal (e.g. a GMSK signal), we explore both the nonconjugate and the conjugate cyclostationarity. A multi-cycle detector is proposed in time-domain making use of the conjugate cyclic autocorrelation to detect the UWB signal under the existence of the GMSK signal. The simulation results indicate the possibility to detect the UWB signal which is overwhelmed by the GMSK signal.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121923992","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663858
Ibrahim Khalil Sileh, W. Xiang, A. Maxwell
Orthogonal frequency division multiplexing (OFDM) based relay architecture is a promising technique in modern wireless communication systems. In frequency-selective channels, different sub-carriers experience different fades. Data transmitted on the sub-carriers which experience deep fade will have a high probability of getting lost at the destination. In this paper, we propose a multicarrier-adaptive hybrid relay protocol (MC-AHRP) over frequency-selective channels to overcome this problem. In the proposed protocol, the subcarrier performs an amplify-and-forward (AF) scheme when the instantaneous SNR of the source-relay link exceeds a preset threshold value, or it utilizes the adaptive decode-and-forward (ADF) scheme as the alternative. For any subcarrier of the ADF scheme that fails to be decoded, the destination selects the respective subcarrier from the direct transmission path instead. The performance of the proposed scheme is analyzed in terms of bit error probability (BEP). Simulation and numerical results show that a significant performance gain can be achieved.
{"title":"Error probability of OFDM-based hybrid relay protocols over wideband fading channels","authors":"Ibrahim Khalil Sileh, W. Xiang, A. Maxwell","doi":"10.1109/ICUWB.2013.6663858","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663858","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) based relay architecture is a promising technique in modern wireless communication systems. In frequency-selective channels, different sub-carriers experience different fades. Data transmitted on the sub-carriers which experience deep fade will have a high probability of getting lost at the destination. In this paper, we propose a multicarrier-adaptive hybrid relay protocol (MC-AHRP) over frequency-selective channels to overcome this problem. In the proposed protocol, the subcarrier performs an amplify-and-forward (AF) scheme when the instantaneous SNR of the source-relay link exceeds a preset threshold value, or it utilizes the adaptive decode-and-forward (ADF) scheme as the alternative. For any subcarrier of the ADF scheme that fails to be decoded, the destination selects the respective subcarrier from the direct transmission path instead. The performance of the proposed scheme is analyzed in terms of bit error probability (BEP). Simulation and numerical results show that a significant performance gain can be achieved.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116627389","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663842
E. Muhr, R. Vauché, S. Bourdel, J. Gaubert, O. R. Sparrow, N. Dehaese, I. Benamor, H. Barthélemy
This paper presents the design of a fully integrated pulse generator which allows BPSK modulation to be implemented. This emitter is based on the response filter architecture and has been integrated in a 130 nm CMOS technology with a 1.2 V supply voltage on a silicon area of 2.88 mm2. The bandwidth at -10 dB is about 1.8 GHz around 3.52 GHz. The output dynamic voltage is equal to 1.72 V peak to peak on a 100 Ω differential load which gives an energy of 1.93 pJ for the twice bipolar generated pulses and demonstrates the pulse generator capability to be used for bipolar modulations.
{"title":"High output dynamic UWB pulse generator for BPSK modulations","authors":"E. Muhr, R. Vauché, S. Bourdel, J. Gaubert, O. R. Sparrow, N. Dehaese, I. Benamor, H. Barthélemy","doi":"10.1109/ICUWB.2013.6663842","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663842","url":null,"abstract":"This paper presents the design of a fully integrated pulse generator which allows BPSK modulation to be implemented. This emitter is based on the response filter architecture and has been integrated in a 130 nm CMOS technology with a 1.2 V supply voltage on a silicon area of 2.88 mm2. The bandwidth at -10 dB is about 1.8 GHz around 3.52 GHz. The output dynamic voltage is equal to 1.72 V peak to peak on a 100 Ω differential load which gives an energy of 1.93 pJ for the twice bipolar generated pulses and demonstrates the pulse generator capability to be used for bipolar modulations.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131694488","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663817
M. K. Hosain, A. Kouzani, S. Jaberzadeh
The purpose of this study is to design a low-cost planar Archimedean dipole antenna for batteryless transcranial direct current stimulation devices. The antenna parameters including resonance frequency, radiation efficiency, radiation pattern, and gain are simulated using finite difference time domain based electromagnetic simulation software XFdtd. The proposed antenna is simulated with low-cost FR4 PCB substrate of thickness of 1.6 mm. The antenna is designed with half wavelength of resonant frequency and fed with a matching line. The target frequency band is the industrial, scientific and medical (ISM) band of 915 MHz which is in the simulated band width of 31 MHz (903-934MHz). Moreover, since the bio-effect of specific absorption rate by radio frequency electromagnetic wave for power harvesting is an important concern, we try to find out the safety limit. Thus a quantitative analysis of distributions of electric field and power absorption in anatomical human head model by the far field radio frequency energy received by our designed antenna has been presented.
{"title":"Design and analysis of an antenna for batteryless transcranial direct current stimulation devices","authors":"M. K. Hosain, A. Kouzani, S. Jaberzadeh","doi":"10.1109/ICUWB.2013.6663817","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663817","url":null,"abstract":"The purpose of this study is to design a low-cost planar Archimedean dipole antenna for batteryless transcranial direct current stimulation devices. The antenna parameters including resonance frequency, radiation efficiency, radiation pattern, and gain are simulated using finite difference time domain based electromagnetic simulation software XFdtd. The proposed antenna is simulated with low-cost FR4 PCB substrate of thickness of 1.6 mm. The antenna is designed with half wavelength of resonant frequency and fed with a matching line. The target frequency band is the industrial, scientific and medical (ISM) band of 915 MHz which is in the simulated band width of 31 MHz (903-934MHz). Moreover, since the bio-effect of specific absorption rate by radio frequency electromagnetic wave for power harvesting is an important concern, we try to find out the safety limit. Thus a quantitative analysis of distributions of electric field and power absorption in anatomical human head model by the far field radio frequency energy received by our designed antenna has been presented.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129317195","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663829
Jie Ding, E. Dutkiewicz, Xiaojing Huang, Gengfa Fang
In this paper, an energy-efficient cooperative relay selection scheme is investigated for ultra-wideband (UWB) based wireless body area networks (WBANs). With a realistic nonlinear energy consumption model, the energy consumption for single-relay cooperation is established and the optimal power allocation for cooperation is derived accordingly to minimize the total energy consumption at a given relay location. Afterwards, an energy efficient relay selection criterion is described in detail. Simulation results verify the suitability of the criterion and show that, with the same desired spectral efficiency (SE), direct transmission is preferable for energy saving when the transmitter and receiver are located on the same side of the human body. However, at a suitable relay location and with large transmission distance, cooperative transmission can achieve a significant improvement on energy efficiency compared with direct transmission when the transmitter and receiver are located on the different sides of the human body.
{"title":"Energy-efficient cooperative relay selection for UWB based body area networks","authors":"Jie Ding, E. Dutkiewicz, Xiaojing Huang, Gengfa Fang","doi":"10.1109/ICUWB.2013.6663829","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663829","url":null,"abstract":"In this paper, an energy-efficient cooperative relay selection scheme is investigated for ultra-wideband (UWB) based wireless body area networks (WBANs). With a realistic nonlinear energy consumption model, the energy consumption for single-relay cooperation is established and the optimal power allocation for cooperation is derived accordingly to minimize the total energy consumption at a given relay location. Afterwards, an energy efficient relay selection criterion is described in detail. Simulation results verify the suitability of the criterion and show that, with the same desired spectral efficiency (SE), direct transmission is preferable for energy saving when the transmitter and receiver are located on the same side of the human body. However, at a suitable relay location and with large transmission distance, cooperative transmission can achieve a significant improvement on energy efficiency compared with direct transmission when the transmitter and receiver are located on the different sides of the human body.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131023113","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663828
F. Koshiji, Y. Akiyama, K. Koshiji
In recent years, ultra-wideband (UWB) technology has received considerable attention as a promising technology for realizing ubiquitous networks. In comparison with conventional narrowband antennas, it is more difficult to construct a broadband antenna in electronic equipment because it is necessary to ensure antenna performance over the entire UWB frequency band. In this study, we investigated an unbalanced dipole antenna with semicircular and trapezoidal elements, known for its excellent, broadband performance, in 3G smartphones. Further, we proposed and investigated an antenna configuration that serves both the 2-GHz band for 3G smartphones and the 3.1-10.6-GHz UWB. As a result, we designed and developed an antenna configuration with a VSWR of less than 2.1 in both the 3G and UWB frequency bands, which was adequate for practical use.
{"title":"UWB antenna built into 3G smartphones","authors":"F. Koshiji, Y. Akiyama, K. Koshiji","doi":"10.1109/ICUWB.2013.6663828","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663828","url":null,"abstract":"In recent years, ultra-wideband (UWB) technology has received considerable attention as a promising technology for realizing ubiquitous networks. In comparison with conventional narrowband antennas, it is more difficult to construct a broadband antenna in electronic equipment because it is necessary to ensure antenna performance over the entire UWB frequency band. In this study, we investigated an unbalanced dipole antenna with semicircular and trapezoidal elements, known for its excellent, broadband performance, in 3G smartphones. Further, we proposed and investigated an antenna configuration that serves both the 2-GHz band for 3G smartphones and the 3.1-10.6-GHz UWB. As a result, we designed and developed an antenna configuration with a VSWR of less than 2.1 in both the 3G and UWB frequency bands, which was adequate for practical use.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123758461","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 : 2013-11-14DOI: 10.1109/ICUWB.2013.6663838
S. Alawsh, A. Muqaibel
Ultra wideband (UWB) technology is promising a cutting edge in delivering high data rate for short range wireless communication systems. Because of their large bandwidth, UWB signals may encounter some problems especially with high sampling rate requirements. Moreover, coherence existence with other narrowband systems is a major concern which needs to be addressed through proper mechanisms. Since narrowband interference (NBI) signals have sparse representation in the discrete cosine transform (DCT) domain, they can be estimated and suppressed using Compressive Sensing (CS). CS also has the ability to reduce the high sampling rate requirements. For training based NBI mitigation with CS, three pilot groups symbol are used to estimate the NBI signal subspace, UWB signal subspace, and provide information about the channel. In this paper, the distribution of pilot symbols among the three groups is investigated in the presence of strong NBI. The investigation is based on the bit error rate (BER). The influence of each pilot group symbols is also studied. Simulation results show that the third pilot group symbols is the most dominant one; hence more symbols should be assigned to estimate the channel information.
{"title":"Pilot symbols distribution for compressive sensing based NBI mitigation in UWB systems","authors":"S. Alawsh, A. Muqaibel","doi":"10.1109/ICUWB.2013.6663838","DOIUrl":"https://doi.org/10.1109/ICUWB.2013.6663838","url":null,"abstract":"Ultra wideband (UWB) technology is promising a cutting edge in delivering high data rate for short range wireless communication systems. Because of their large bandwidth, UWB signals may encounter some problems especially with high sampling rate requirements. Moreover, coherence existence with other narrowband systems is a major concern which needs to be addressed through proper mechanisms. Since narrowband interference (NBI) signals have sparse representation in the discrete cosine transform (DCT) domain, they can be estimated and suppressed using Compressive Sensing (CS). CS also has the ability to reduce the high sampling rate requirements. For training based NBI mitigation with CS, three pilot groups symbol are used to estimate the NBI signal subspace, UWB signal subspace, and provide information about the channel. In this paper, the distribution of pilot symbols among the three groups is investigated in the presence of strong NBI. The investigation is based on the bit error rate (BER). The influence of each pilot group symbols is also studied. Simulation results show that the third pilot group symbols is the most dominant one; hence more symbols should be assigned to estimate the channel information.","PeriodicalId":159159,"journal":{"name":"2013 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121067138","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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