Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004.最新文献_第10页

Physical layer built-in security enhancement of DS-CDMA systems using secure block interleaving DS-CDMA系统物理层内嵌安全块交错增强

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/GLOCOM.2005.1577965

Qi Ling, Tongtong Li, Jian Ren

引用次数: 7

A guard band configuration scheme for single-antenna vector OFDM systems 一种单天线矢量OFDM系统的保护带配置方案

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399253

H. Zhang, X. Xia

引用次数: 4

High speed binary addition 高速二进制加法

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399373

R. Jackson, S. Talwar

引用次数: 17

Improved codes for differential space-time-frequency coded OFDM 差分空时频编码OFDM的改进编码

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399150

Q. Ma, C. Tepedelenlioğlu

{"title":"Improved codes for differential space-time-frequency coded OFDM","authors":"Q. Ma, C. Tepedelenlioğlu","doi":"10.1109/ACSSC.2004.1399150","DOIUrl":"https://doi.org/10.1109/ACSSC.2004.1399150","url":null,"abstract":"With no channel state information (CSI) at the receiver, the highest possible diversity order for multiantenna transmissions over frequency selective channels, is given by the product of the number of transmit and receive antennas and the multipath channel length, the same as the case with perfect CSI at the receiver. In this paper, we consider improved nondiagonal codes for differential space-time-frequency (DSTF) coded orthogonal frequency division multiplexing (OFDM), enabling the maximum spatial and multipath diversity without CSI at the receiver. While full diversity gain can be achieved by using existing differential unitary diagonal codes, we propose a systematic approach to designing nondiagonal codes for DSTF systems, which are block diagonal (BD) and have the necessary unitary and full diversity properties. We investigate not only the diversity product, but also other aspects of the distance spectrum, namely the so-called effective multiplicity in designing BD codes. Based on permutation techniques, we have devised new excellent-performing BD DSTF codes, which improve the coding gain up to 3 dB as compared to their diagonal counterparts.","PeriodicalId":396779,"journal":{"name":"Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114193512","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

Precise performance analysis of MRC diversity in microcellular systems with cochannel interference 具有共信道干扰的微蜂窝系统中MRC分集的精确性能分析

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399204

K. Sivanesan, N. Beaulieu

引用次数: 3

Acoustic source localization in distributed sensor networks 分布式传感器网络中的声源定位

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399368

Thibaut Ajdler, I. Kozintsev, R. Lienhart, M. Vetterli

{"title":"Acoustic source localization in distributed sensor networks","authors":"Thibaut Ajdler, I. Kozintsev, R. Lienhart, M. Vetterli","doi":"10.1109/ACSSC.2004.1399368","DOIUrl":"https://doi.org/10.1109/ACSSC.2004.1399368","url":null,"abstract":"This paper studies the problem of sound source localization in a distributed wireless sensor network formed by mobile general purpose computing and communication devices with audio I/O capabilities. In contrast to well understood localization methods based on dedicated microphone arrays, in our setting sound localization is performed using a sparse array of arbitrary placed sensors (in a typical scenario, localization is performed by several laptops/PDAs co-located in a room). Therefore any far-field assumptions are no longer valid in this situation. Additionally, localization algorithm's performance is affected by uncertainties in sensor position and errors in A/D synchronization. The proposed source localization algorithm consists of two steps. In the first step, time differences of arrivals (TDOAs) are estimated for the microphone pairs, and in the second step the maximum likelihood (ML) estimation for the source position is performed. We evaluate the Cramer-Rao bound (CRB) on the variance of the location estimation and compare it with simulations and experimental results. We also discuss the effects of distributed array geometry and errors in sensor positions on the performance of the localization algorithm. The performances of the system are likely to be limited by errors in sensor locations and increase when the microphones have a large aperture with respect to the source.","PeriodicalId":396779,"journal":{"name":"Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114240187","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: 66

Digital modulation recognition using support vector machine classifier 基于支持向量机分类器的数字调制识别

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399565

Hussam Mustafa, Miloš Doroslova

引用次数: 35

Probabilistic model distortion measure and its application to model-set design of multiple model approach 概率模型失真测度及其在多模型方法模型集设计中的应用

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399546

Zhanlue Zhao, X.R. Li

引用次数: 6

Low-bit rate motion JPEG using differential encoding 使用差分编码的低比特率运动JPEG

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399454

S. Kamath, J. Jackson

引用次数: 13

Maximum likelihood diffusive source localization based on binary observations 基于二元观测的最大似然扩散源定位

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. Pub Date : 2004-11-07 DOI: 10.1109/ACSSC.2004.1399291

Y. Levinbook, T. Wong

引用次数: 11