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2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications最新文献

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Performance analysis of double-weight O-CDMA scheme with adjustable bit power 位功率可调的双权O-CDMA方案性能分析
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5654448
Han-Yun Chu, Chih-Hao Chen, Guu-chang Yang, Cheng-Yuan Chang, W. Kwong
{"title":"Performance analysis of double-weight O-CDMA scheme with adjustable bit power","authors":"Han-Yun Chu, Chih-Hao Chen, Guu-chang Yang, Cheng-Yuan Chang, W. Kwong","doi":"10.1109/ISSSTA.2010.5654448","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5654448","url":null,"abstract":"In this paper, we study the combination of code-weight variation and bit-power control in order to provide differential quality-of-service (QoS) in multimedia optical codedivision multiple access. A simplified performance model is formulated for studying the interaction of the weight-variation and power-control approaches. For sake of illustration, double-weight codes are studied in this paper. Our results show that the QoS of double-wight codes can be fine-tuned by controlling both code weight and bit power.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116300715","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}
引用次数: 0
Throughput performance enhancement for multiuser diversity OFDMA using MMSE equalization without guard interval 利用无保护间隔的MMSE均衡提高多用户分集OFDMA的吞吐量性能
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651338
Y. Ida, C. Ahn, T. Kamio, H. Fujisaka, K. Haeiwa
{"title":"Throughput performance enhancement for multiuser diversity OFDMA using MMSE equalization without guard interval","authors":"Y. Ida, C. Ahn, T. Kamio, H. Fujisaka, K. Haeiwa","doi":"10.1109/ISSSTA.2010.5651338","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651338","url":null,"abstract":"In recent year, to achieve a high data rate and high quality multimedia service in wireless communication systems, orthogonal frequency division multiplexing (OFDM) is attractive and widely studied. Moreover, orthogonal frequency division multiple access (OFDMA) which is combined OFDM and frequency division multiple access (FDMA) provides each user with a fraction of the available number of subcarriers. The diversity that exists between users is called multiuser diversity and can be exploited by the sender to enhance the capacity of wireless network. In a multiuser diversity OFDMA, exploiting channel fluctuation diversity is in essence done by selecting the user with the strong subcarrier channels. Therefore, the multiuser diversity techniques promise dramatically increased system throughput and spectral efficiency. In multipath fading environment, severe fading of the signal amplitude and intersymbol interference (ISI) due to the frequency selectivity of the channel cause an unacceptable degradation of error performance. In an OFDM system, ISI is eliminated by inserting guard interval (GI) longer than the delay spread of the channel. On the other hand, this operation is degraded the throughput performance. In this paper, we propose to improve the throughput performance for multiuser diversity OFDMA without GI. Previously, we have proposed ISI and inter-carrier interference (ICI) compensation method. In addition, the minimum mean square error (MMSE) equalization can suppress the noise enhancement due to ISI and ICI. Therefore, we employ these methods to eliminate ISI and ICI and try to improve the throughput performance.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126606292","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}
引用次数: 2
An adaptive SC-FDE transmission enhancing frequency diversity benefit 自适应SC-FDE传输增强了频率分集效益
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651353
Ryouhei Kaneko, Yunhan Wang, F. Maehara
{"title":"An adaptive SC-FDE transmission enhancing frequency diversity benefit","authors":"Ryouhei Kaneko, Yunhan Wang, F. Maehara","doi":"10.1109/ISSSTA.2010.5651353","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651353","url":null,"abstract":"This paper proposes an adaptive single-carrier modulation with frequency domain equalization (SC-FDE) scheme further enhancing frequency diversity benefit. We have so far proposed the periodic spectrum transmission realized by the even-numbered time domain samples, which further improves the bit error rate (BER) of SC-FDE in severe frequency selective fading channels. However, in frequency non-selective fading channels, the periodic spectrum transmission provides worse BER than the traditional non-periodic transmission. Therefore, the proposed adaptive transmission chooses the appropriate transmission mode by comparing the error vector magnitudes (EVM) of the periodic and non-periodic transmissions. Moreover, since the EVM is measured by the CAZAC-based pilot signals used for channel estimation, additional redundancy is not needed any more. Numerical results show that the proposed adaptive scheme always provides the best performance irrespective of the frequency selectivity in channels while its frequency selectivity gives some BER degradation in the periodic and non-periodic transmissions.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131027074","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}
引用次数: 2
SIMO MC-CDMA multiuser detectors: A DSP implementation approach SIMO MC-CDMA多用户检测器:一种DSP实现方法
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651560
L. D. Oliveira, B. Angélico, P. Jeszensky, T. Abrão
{"title":"SIMO MC-CDMA multiuser detectors: A DSP implementation approach","authors":"L. D. Oliveira, B. Angélico, P. Jeszensky, T. Abrão","doi":"10.1109/ISSSTA.2010.5651560","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651560","url":null,"abstract":"This work presents a comparative framework for different multiuser detectors (MuD) applied to single input multiple output (SIMO) multicarrier-code division multiple access (MC-CDMA) system. The Optimum MuD (OMuD), Parallel Interference Cancelling (PIC), Linear MUDs and the 1-optimum Local Search (1-LS) algorithms are analyzed and compared as performance against complexity trade-off. Performance evaluation is carried out in terms of symbol error rate (SER), and further, the implementations aspects are fully exhibited through a number of operation complexity analysis. Simulation results indicate clearly the advantage of sub-optimum 1-LS detector approach in terms of performance-complexity trade-off.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133362558","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}
引用次数: 0
Continuous ECG data gathering by a wireless vital sensor — Evaluation of its sensing and transmission capabilities 用无线生命传感器连续采集心电数据。其传感和传输能力的评价
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5649925
H. Sugano, S. Hara, T. Tsujioka, S. Nakajima, T. Inoue, K. Takeuchi, Hajime Nakamura
{"title":"Continuous ECG data gathering by a wireless vital sensor — Evaluation of its sensing and transmission capabilities","authors":"H. Sugano, S. Hara, T. Tsujioka, S. Nakajima, T. Inoue, K. Takeuchi, Hajime Nakamura","doi":"10.1109/ISSSTA.2010.5649925","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5649925","url":null,"abstract":"This paper investigates the possibility of a realtime electrocardiogram (ECG) data gathering by a wireless vital sensor in houses and hospitals. First of all, to evaluate the ECG capability, we conducted clinical tests with 67 subjects comparing 24-hour data obtained at houses between the wireless vital sensor and a Holter monitor. Secondly, to evaluate the wireless transmission capability, we conducted experiments with 8 subjects in patient rooms at a hospital. The clinical test results conclude that, as long as the sensed data are successfully received at a receiver, the wireless vital sensor has a comparable performance with the Holter ECG monitor, on the other hand, the experimental results show that the data transmission capability with a single receiver is not satisfactory for real-time continuous monitoring, but the use of three receivers can significantly improve the data transmission quality by receive diversity effect.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124090968","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}
引用次数: 9
Bit-error rates of MIMO-SESS over Rayleigh fading channels MIMO-SESS在瑞利衰落信道上的误码率
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5648840
Shichuan Ma, L. Nguyen, W. Jang, Yaoqing Yang
{"title":"Bit-error rates of MIMO-SESS over Rayleigh fading channels","authors":"Shichuan Ma, L. Nguyen, W. Jang, Yaoqing Yang","doi":"10.1109/ISSSTA.2010.5648840","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5648840","url":null,"abstract":"In recent work we have incorporated self-encoded spread spectrum (SESS) in multiple-input multiple-output (MIMO) systems as a novel means to combat fading in wireless channels. In this paper, we report analytical study of the bit error rate (BER) performance of MIMO-SESS systems under Rayleigh fading. The BER expressions are derived in closed-form and the veracity of the analysis was confirmed with numerical calculations that demonstrated excellent agreement with simulation results. The performance analysis demonstrates that the effects of fading can be effectively mitigated by taking advantage of spatial and temporal diversities. For example at 10-4 BER, a 2 × 2 MIMO-SESS system requires a signal-to-noise ratio of only 3 dB under Rayleigh fading and achieves about 7 dB performance improvement over a MIMO PN-coded spread spectrum system.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"206 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115140637","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}
引用次数: 1
Low complexity decoder design of non-binary LDPC codes in amplify-and-forward relay networks with cooperative diversity 协同分集放大转发中继网络中非二进制LDPC码的低复杂度解码器设计
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5650020
Yier Yan, Ying Guo, M. Lee
{"title":"Low complexity decoder design of non-binary LDPC codes in amplify-and-forward relay networks with cooperative diversity","authors":"Yier Yan, Ying Guo, M. Lee","doi":"10.1109/ISSSTA.2010.5650020","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5650020","url":null,"abstract":"In this paper, a simple cooperative diversity scheme in M + 2 relay network with low-density parity-check (LDPC) codes is proposed. By allocating random interleavers to each relay node, the interleaved sequences provide M copies of received vector to achieve the cooperative diversity. An efficiently iterative coding algorithm is proposed with low complexity. The complexity involved grows linearly with the number of relay nodes and size of Galois Field.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125660330","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}
引用次数: 0
Performance of self-encoded spread spectrum under pulsed-noise jamming 脉冲噪声干扰下自编码扩频的性能
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5649468
Poomathi Duraisamy, L. Nguyen
{"title":"Performance of self-encoded spread spectrum under pulsed-noise jamming","authors":"Poomathi Duraisamy, L. Nguyen","doi":"10.1109/ISSSTA.2010.5649468","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5649468","url":null,"abstract":"In this paper, we study the performance of self-encoded spread spectrum (SESS) system under pulsed noise jamming and show that iterative detection can improve the bit-error rate (BER) performance significantly. We first verify that the jamming performance of SESS with correlation detection is similar to conventional Direct Sequence Spread Spectrum (DSSS) system We then show that the performance improves by approximately 7dB when the correlation detection is combined with the iterative detection. The results demonstrate that iterative detection has the potential to completely mitigate the effect of jamming on the BER performance of SESS under pulsed-noise jamming.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126051211","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}
引用次数: 6
Platoon characteristics of automatic vehicle speed control for vehicles equipped with DS-UWB radar 配备DS-UWB雷达的车辆自动车速控制的队列特性
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5653334
Junzoh Tsuchiya, M. Hayashi, R. Kohno
{"title":"Platoon characteristics of automatic vehicle speed control for vehicles equipped with DS-UWB radar","authors":"Junzoh Tsuchiya, M. Hayashi, R. Kohno","doi":"10.1109/ISSSTA.2010.5653334","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5653334","url":null,"abstract":"A vehicular radar is an essential device for reducing traffic accidents. Direct sequence ultra wideband (DS-UWB) radar has been studied in recent years as a kind of radar enabling high — precision ranging. In this paper, we assume that all vehicles are equipped with the DS-UWB radar in the platoon environment. The purpose of this paper is to show the platoon characteristics when automatic speed control is applied with DS-UWB. Additionally, we propose DS-UWB radar using variable length of spreading codes. The proposal is evaluated by computer simulations. Some simulation results show that not only ranging time could be improved by the proposed system but also trade-off between processing time and vehicle following accuracy.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128894847","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}
引用次数: 8
A threshold-based MIMO TOA location estimation for cellular systems 基于阈值的蜂窝系统MIMO TOA位置估计
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5653348
Tomofumi Yabu, S. Hara, R. Zemek, T. Derham
{"title":"A threshold-based MIMO TOA location estimation for cellular systems","authors":"Tomofumi Yabu, S. Hara, R. Zemek, T. Derham","doi":"10.1109/ISSSTA.2010.5653348","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5653348","url":null,"abstract":"In a cellular system, Multiple-Input/Multiple-Output (MIMO) technique increases the number of links for not only spatially multiplexing data to transmit/receive but also measuring the distance between a base station (BS) and a mobile station (MS) at the same time. Therefore, if the MIMO technique is applied to a system-based location estimation, it must improve the accuracy of location estimate. This paper evaluates the performances of threshold-based Time of Arrival (TOA) location estimation methods in cellular systems. Computer simulation results on the location estimation error reveal that, if we employ no threshold, the selection method is a proper choice, whereas if we can optimally adjust the threshold according the Carrier-to-Noise power Ratio (CNR), the average method is a proper choice.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132185948","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}
引用次数: 1
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