Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)最新文献_第10页

How narrow is narrowband? [adaptive array signal processing] 窄带有多窄?[自适应阵列信号处理]

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679122

M. Zatman

引用次数: 0

DPSK diversity combining for CDMA frequency selective fading channels CDMA频率选择性衰落信道的DPSK分集组合

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679131

A. Duel-Hallen, S. Andrijic

{"title":"DPSK diversity combining for CDMA frequency selective fading channels","authors":"A. Duel-Hallen, S. Andrijic","doi":"10.1109/ACSSC.1997.679131","DOIUrl":"https://doi.org/10.1109/ACSSC.1997.679131","url":null,"abstract":"This paper addresses multiuser detection and diversity combining for frequency selective fading code-division multiple access (CDMA) channels. It is well known that the decorrelating detector is an effective technique for separating signals of different users in bandwidth-efficient CDMA. For a general asynchronous CDMA channel, the output of the decorrelator for each user can be characterized by an equivalent single-user system with multiuser (MAI)-induced intersymbol interference (ISI). We investigate diversity combining techniques for this equivalent single-user channel using differential phase shift keying (DPSK) detection. This method does not require tracking of rapidly changing fading parameters. To improve the performance of the DPSK combiner, it can be beneficial to weigh the signals associated with different paths. We consider several criteria for choosing these weights. For the synchronous (ISI-free) channel, we show that the bit error rate (BER) of the optimal combiner can be closely approximated by a combination of two decorrelating detectors (with either noise whitening or signal whitening filters). We also discuss this \"hybrid\" approach for asynchronous channels with MAI-induced ISI. Finally, a minimum mean square error (MMSE) combiner is analyzed and compared to other techniques.","PeriodicalId":240431,"journal":{"name":"Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115576862","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

CMOS bilateral linear floating resistors for neural-type cell arrays 用于神经细胞阵列的CMOS双边线性浮动电阻器

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679082

L. Sellami, S.K. Singh, R. Newcomb, A. Rasmussen, M. Zaghloul

引用次数: 2

Ambiguity resistant precoders in ISI/multipath cancellation: distance and optimality ISI/多径对消中的抗歧义预编码器:距离和最优性

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.680580

X. Xia

引用次数: 4

Scalable codec architectures for Internet video-on-demand 面向互联网视频点播的可扩展编解码器架构

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.680241

B. Girod, N. Farber, U. Horn

{"title":"Scalable codec architectures for Internet video-on-demand","authors":"B. Girod, N. Farber, U. Horn","doi":"10.1109/ACSSC.1997.680241","DOIUrl":"https://doi.org/10.1109/ACSSC.1997.680241","url":null,"abstract":"The heterogeneous structure of the Internet is a great obstacle for establishing real-time video services. Scalable video codecs, generating bit-streams decodable at different rates, have been proposed to address the heterogeneity problem. In this paper, we review standard-compliant and non-compliant codec architectures for Internet video-on-demand. For compression based on the H.263 standard, we have developed a compatible architecture that allows to switch between pre-encoded bit-streamers of different bitrates. This architecture provides excellent streaming performance for point-to-point communication scenarios that offer a low delay feedback channel. Then we present a non-compliant fully scalable video codec based on a spatiotemporal resolution pyramid. This approach can encode embedded lower bit-rate layers at the same overall hit-rate as needed by H.263 single-layer coding and can also support multicasting. The complexity of both schemes is sufficiently low to allow software-only implementations of Internet video services. This is demonstrated by means of an implemented World Wide Web video server application.","PeriodicalId":240431,"journal":{"name":"Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)","volume":"421 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116229992","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: 22

Stochastic maximum likelihood methods for semi-blind channel equalization 半盲信道均衡的随机极大似然方法

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679178

H. A. Çırpan, M. Tsatsanis

引用次数: 14

On prediction error coding methods for lossless image compression 无损图像压缩中的预测误差编码方法

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679142

G. Langdon, B. Mealy

引用次数: 1

Near-lossless image compression by combining wavelets and CALIC 结合小波和CALIC的近无损图像压缩

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.679139

Xiaolin Wu, P. Bao

引用次数: 9

Equation-error closed-loop system identification using cyclic spectral analysis 基于循环谱分析的方程误差闭环系统辨识

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.680372

C. Tontiruttananon, Jitendra Tugnait

引用次数: 1

Encoder optimization in an extended H.263 framework 扩展H.263框架中的编码器优化

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI: 10.1109/ACSSC.1997.680147

P. Subramanian, D. Blasiak, Jiandong Shen, W. Chan

引用次数: 1