IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.最新文献_第5页

Error Control Of Using Generalized CELP-Coded Speech Using Generalized Concatenated Codes 使用广义拼接码的广义celp编码语音的错误控制

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571464

V. Carmagnola, M. Festa, E. Biglieri, R. Montagna

引用次数: 0

Registration In Cellular Telephone Systems 蜂窝式电话系统中的登记

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571498

E. Tiedemann

引用次数: 6

Output Power Of Microwave Oscillators 微波振荡器的输出功率

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571461

P. Yip, M. W. Luk

引用次数: 0

Digital Chip Synchronization Algorithms For Mobile Satellite Communication With Bandlimited Direct-Sequence Spread-Spectrum Signals 带限直接序列扩频信号移动卫星通信的数字芯片同步算法

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571486

M. Moeneclaey, G. D. Jonghe

引用次数: 1

Array Antenna Beamforming Based On Estimation Of Arrival Angles Using DFT On Spatial Domain 基于空间域DFT估计到达角的阵列天线波束形成

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571462

R. Kohno, C. Yim, H. Imai

{"title":"Array Antenna Beamforming Based On Estimation Of Arrival Angles Using DFT On Spatial Domain","authors":"R. Kohno, C. Yim, H. Imai","doi":"10.1109/PIMRC.1991.571462","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571462","url":null,"abstract":"Fading which is caused by multipath distortion due to wave reflection from an obstacle such as a building is a major problem in personal, indoor and mobile radio communications. As strategies for the fading, an error-correcting code, an automatic equalizer, and a diversity technique have been studied and developed. An adaptive array antenna, which is a kind of a diversity technique, is useful to suppress indirect or delayed signal waves due to multipath because it can adaptively direct its nulls at them[l][2]. Adaptive algorithm for controlling complex weights of antenna elements is required to achieve appropriate beamforming for direct and indirect signals with unknown arrival angles. In LMS (least mean square) algorithm, weights of antenna elements are adaptively updated so as to minimize mean square errors between antenna output and reference signals. In CMA (constant modulus algorithm), constant envelope of received constant modulus signals is used as a criterion to update the weights. These algorithms originate in the updating coefficients of adaptive digital filters and take a long time for convergence of weights because weights are updated sample by sample. Errors in the reference signals aff'ect the convergence of weights. If arrival angles of the received signals are varied quickly like in mobile communications, their adaptability will not be guaranteed.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114360292","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: 10

Bit Error Probability For Direct-Sequence Spread-Spectrum In A Shadowed Rician Fading Land Mobile Satellite Channel With Diversity 带分集的阴影衰落陆地移动卫星信道中直接序列扩频误码概率

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571477

R. V. Nee, H. Misser, R. Prasad

{"title":"Bit Error Probability For Direct-Sequence Spread-Spectrum In A Shadowed Rician Fading Land Mobile Satellite Channel With Diversity","authors":"R. V. Nee, H. Misser, R. Prasad","doi":"10.1109/PIMRC.1991.571477","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571477","url":null,"abstract":"The bit error probability is analyzed €or direct-sequence spread-spectrum transmission in a land mobile satellite channel using coherent binary phase shift keying (BPSK) modulation. The influence of diversity on the bit error probability is investigated. Two types of diversity are considered, namely selection diversity (SD) and maximal ratio combining (MRC), and the results are compared. 1.0 INTRODUCTION. Land mobile satellite communication can provide various applications, e.g. voice, data, position finding and paging services, interconnection to the public switched telephone network, and the possibility of private networks [l]. Measurements show [2,3] that the land mobile satellite channel can be approximated as a shadowed Rician fading channel in rural and suburban environments. The channel modeled in [ 2 , 3 ] is appropriate for narrow-band applications. The purpose of this paper is first to extend the model for the use of spread-spectrum modulation. Further, the bit error probability is analyzed and evaluated for light, average and heavy shadowing. Finally, the influence of diversity techniques on the bit error probability is investigated. The type of diversity considered in this paper is microscopic diversity (path diversity), which mitigates the effects of multipath fading.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130362288","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

Finite State System Approach To Continuous Phase Modulation 连续相位调制的有限状态系统方法

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571485

J. Fonseka, T. R. Mao

引用次数: 0

The Development Of A Comprehensive Indoor Propagation Model 室内综合传播模型的建立

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571468

J. LeBel, P. Melancon

引用次数: 9

The Performance Of ALOHA Protocol In Indoor Radio Environment ALOHA协议在室内无线电环境下的性能研究

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571501

J. Wen, Jin-Fu Chang

引用次数: 1

A Design Of An Adaptive Decision Feedback Equalizer For Digital Mobile Communication Systems 数字移动通信系统自适应决策反馈均衡器的设计

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI: 10.1109/PIMRC.1991.571457

K. Murakami, K. Ueda, M. Takano, T. Fujino

引用次数: 2