2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications最新文献_第3页

A study on routing selection for avoiding interference in UWB ad-hoc networks UWB自组网中避免干扰的路由选择研究

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5649179

Tatsuya Soejima, C. Sugimoto, R. Kohno

{"title":"A study on routing selection for avoiding interference in UWB ad-hoc networks","authors":"Tatsuya Soejima, C. Sugimoto, R. Kohno","doi":"10.1109/ISSSTA.2010.5649179","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5649179","url":null,"abstract":"UWB wireless communication systems have attracted attention as a new system that enables low power consumption, high speed communications, low costs and accurate locations capability. Since the UWB band overlaps the spectrum of existing narrowband and wide band systems, its worldwide acceptance is mainly conditioned by coexistence issues. In this paper, we propose a new route selection algorithm for UWB ad-hoc networks using geolocation capability of UWB systems and considering reduction of interference. We showed that the proposed algorithm can spatially avoid interference to other coexisting networks by Multi-hop using geolocation of coexisting nodes and confirm that the interference from a UWB network to other coexisting networks can be suppressed by shortening the hop interval. The route constructed with the proposal algorithm can improve the rate of time to give serious interference compared with the route constructed with the shortest hop. Additionally, average value of interference and the worst value of interference can be suppressed. But, the number of hops increasing by sending and receiving at each routing leads to the increase of time UWB occupies the bandwidth. For this problem, we show that the route that suppresses interference can be constructed in the proposal algorithm, even if the limiting condition is added.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"18 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":"132949041","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

Low complexity estimation of multiple frequency offsets using optimized training signals 使用优化的训练信号进行多频偏的低复杂度估计

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5653223

Tommi Koivisto, V. Koivunen

引用次数: 2

Relatively prime length spreading sequences for DS-CDMA DS-CDMA的相对素数长度扩频序列

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651141

Naoya Kitamura, M. Hamamura

引用次数: 1

Novel Multi-Correlation Differential Detection for improving detection performance in DSSS 新的多相关差分检测方法提高了DSSS的检测性能

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5653329

Yun-teng Lu, A. Finger

{"title":"Novel Multi-Correlation Differential Detection for improving detection performance in DSSS","authors":"Yun-teng Lu, A. Finger","doi":"10.1109/ISSSTA.2010.5653329","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5653329","url":null,"abstract":"Multipath, Multiple-Access-Interference (MAI) and Near-Far effect are three main influences on the performance of CDMA-based communication and navigation systems. A great deal of research has been conducted to develop advanced signal processing algorithms and novel receiver structures useful for mitigation of these effects in mobile land wireless communication systems, such as UMTS. One effect way of dealing with multiuser interference in CDMA systems is to employ Successive-Interference-Cancellation (SIC). However, the difficulty in performing SIC for some scenarios, for example, indoor location systems, lies in accurately estimating the amplitude, which is dependent on the transmitter's location and is not directly known, of the signal to be canceled. In this paper we introduce a novel receiver structure Multi-Correlation Differential Detection (MCDD) to suppress the Inter-Symbol-Interference (ISI), MAI and Near-Far effect effectively and just a simple peak detection algorithm is needed for ranging signal time-of-flight (ToF) for location systems. Especially under severely Near-Far effect the MCDD receiver outperforms in terms of probability of detection over traditional matched filter noticeably.","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":"125521612","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: 5

Chaos codes vs. orthogonal codes for CDMA CDMA的混沌码与正交码

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5652316

Philip Ihan Martoyo, Andi Susanto, Eddy Wijanto, H. Kanalebe, K. Gandi, K. Gandi

引用次数: 10

Feedback-aided pilot placement for amplify-and-forward OFDM relay links 放大转发OFDM中继链路的反馈辅助导频安置

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651339

Kuang-Yu Sung, Y. Hong, Chi-chao Chao

{"title":"Feedback-aided pilot placement for amplify-and-forward OFDM relay links","authors":"Kuang-Yu Sung, Y. Hong, Chi-chao Chao","doi":"10.1109/ISSSTA.2010.5651339","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651339","url":null,"abstract":"This paper examines the use of channel feedback to determine the optimal pilot placement for channel estimation of amplify-and-forward OFDM relay links. With channel information from the previous symbol period, new pilot locations can be determined so that, on the one hand, channel estimation errors are controlled at a low level and, on the other hand, reliable subcarrier channels are made available for data transmission. The minimum effective SNR across subcarriers is a factor that dominates the symbol-error-rate (SER) at high SNR and, thus, is utilized as the performance measure in this work. First, a lower bound is derived for the achievable SNR gain, which is defined as the ratio between the effective SNR achieved with feedback and that without feedback (i.e., the equal-spaced pilot-placement scheme). The analytic results show that, with a fixed number of subcarriers, the feedback gain will grow as the number of pilot tones increases. Due to the complexity required in finding the optimal solution, a suboptimal but efficient algorithm, called the iterative pilot relocation (IPR) scheme, is proposed, where iterative exchanges between old pilot locations and the location of the worst data subcarrier are done to improve the minimum effective SNR. The efficacy of the proposed IPR scheme is demonstrated through numerical simulations.","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":"130671739","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: 3

Study of human body detection for health care using UWB-IR in indoor environments 室内环境下UWB-IR人体检测技术的研究

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5653757

Katsuhiro Yamashina, Naoyuki Matsuda, K. Takizawa, T. Ikegami

引用次数: 5

Medical ICT serving society 医疗资讯及通讯科技服务社会

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651159

M. Hamalainen, J. Iinatti, Timo Jamsa

引用次数: 3

Design of a high-spectral-efficiency MIMO MB-OFDM UWB baseband transceiver 高频谱效率MIMO MB-OFDM UWB基带收发器的设计

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5649033

Jian-Chen Liao, Yuan-Wei Wu, Hsi-Pin Ma

引用次数: 3

Accurate BER analysis of square OSTBCs with imperfect channel estimation in arbitrarily correlated Rayleigh fading 任意相关瑞利衰落条件下不完全信道估计的方形ostbc的精确误码率分析

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651344

L. Jacobs, M. Moeneclaey

引用次数: 1