Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94)最新文献_第2页

Performance analysis of DS unslotted packet radio networks with given auto- and crosscorrelation sidelobes 给定自相关副瓣和相互相关副瓣的DS无开槽分组无线网络性能分析

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379582

L. Pap

引用次数: 2

Co-channel interference cancellation in optical synchronous CDMA communication systems 光同步CDMA通信系统中的同信道干扰消除

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379519

H. Shalaby, E. Sourour

引用次数: 28

New PN code acquisition schemes for low Earth orbit satellites 低地球轨道卫星PN码捕获新方案

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379513

S. Glisic, T. Poutanen, W. W. Wu

{"title":"New PN code acquisition schemes for low Earth orbit satellites","authors":"S. Glisic, T. Poutanen, W. W. Wu","doi":"10.1109/ISSSTA.1994.379513","DOIUrl":"https://doi.org/10.1109/ISSSTA.1994.379513","url":null,"abstract":"A new approach to PN code acquisition, for CDMA LEO satellite systems experiencing high code Doppler and code Doppler rate, is presented and analysed. The approach is based on transforming the two dimensional code Doppler (D) and delay (t) uncertainty region (D,t) into a new uncertainty region (T/sub c/,t) where T/sub c/ is the period of the correlation pulses at the output of a sliding correlator. When Doppler rate is present the three dimensional uncertainty region (D, R/sub t/,t) is transformed into a new one (T/sub c/, R/sub t/,t) where R/sub d/ and R/sub t/ are Doppler rate and correlation pulse period rate respectively. The main motivation for this work is to find new algorithms which are suitable for all digital receiver implementation. In the implementation of these new algorithms rather complex FFT hardware components are now replaced by much simpler components such as accumulators. These algorithms make CDMA techniques feasible in the communication between LEO satellite and small ground based user terminals. Personal communications based on LEO satellites is an option that has been considered extensively for rural areas. A comprehensive performance study of the new PN code acquisition system is presented and discussed.<<ETX>>","PeriodicalId":158358,"journal":{"name":"Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116047913","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

Throughput and delay analysis of a cellular slotted DS CDMA system with imperfect power control and sectorization 具有不完全功率控制和扇区的蜂窝开槽DS CDMA系统的吞吐量和延迟分析

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379551

M. Jansen, R. Prasad

引用次数: 3

Direct sequence CDMA technology and its application to future portable multimedia communication systems 直接顺序CDMA技术及其在未来便携式多媒体通信系统中的应用

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379546

D. Kerek, H. Olson, H. Tenhunen, Gerald Q. Maguire, F. Reichert

引用次数: 11

Optimum PN sequences for CDMA systems CDMA系统的最优PN序列

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379619

D. Sarwate

引用次数: 17

Rejection of narrowband interference in DS spread spectrum systems using two-stage decision feedback filters 用两级决策反馈滤波器抑制DS扩频系统中的窄带干扰

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379530

M. Dukic, Z. Dobrosavljevic, Z. D. Stojanovic, I. Stojanovic

引用次数: 3

Co-channel interference cancellation technique using orthogonal convolutional codes 使用正交卷积码的同信道干扰消除技术

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379600

Y. Sanada, Qiang Wang

{"title":"Co-channel interference cancellation technique using orthogonal convolutional codes","authors":"Y. Sanada, Qiang Wang","doi":"10.1109/ISSSTA.1994.379600","DOIUrl":"https://doi.org/10.1109/ISSSTA.1994.379600","url":null,"abstract":"This paper proposes a new co-channel interference cancellation technique which utilizes orthogonal convolutional codes. For spread spectrum multiple access, co-channel interference (CCI) limits the performance of a communication link. To remove this interference, several CCI cancellation techniques have been proposed. Especially techniques which do not require the receiver to have knowledge of the cross-correlation between user sequences have been presented. However, these methods leave residual interference after the cancellation caused by errors on the initial decision. To reduce the residual interference and improve the initial decision, the proposed scheme utilizes the error correcting capability of the orthogonal convolutional code. This paper evaluates the performance of this scheme. It is shown that up to about 40 users, the proposed CCI canceller has a performance which is near the optimum performance when multiuser interference is completely canceled. It is also shown that the proposed CCI canceller offers an improvement in capacity by a factor of 1.5/spl sim/3 as compared with a conventional canceller.<<ETX>>","PeriodicalId":158358,"journal":{"name":"Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130508200","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: 4

Optical correlator receivers for SIK DS-CDMA communication systems 用于SIK DS-CDMA通信系统的光相关接收器

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379518

T. O’Farrell, S. Lochmann

引用次数: 4

An overview of TU Delft research on CDMA 代尔夫特理工大学CDMA研究综述

Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94) Pub Date : 1994-07-04 DOI: 10.1109/ISSSTA.1994.379570

R. Prasad

引用次数: 5