Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97最新文献_第4页

Wideband CDMA test system 宽带CDMA测试系统

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.631126

K. Pajukoski, Jari Savusalo

引用次数: 13

On verifying a first-order Markovian model for the multi-threshold success/failure process for Rayleigh channel 瑞利信道多阈值成功/失败过程的一阶马尔可夫模型验证

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.624354

F. Babich, G. Lombardi

引用次数: 14

Measurements of millimeter wave indoor propagation and high-speed digital transmission characteristics at 60 GHz 测量60ghz毫米波室内传播和高速数字传输特性

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.624381

A. Kato, T. Manabe, Y. Miura, K. Sato, T. Ihara

{"title":"Measurements of millimeter wave indoor propagation and high-speed digital transmission characteristics at 60 GHz","authors":"A. Kato, T. Manabe, Y. Miura, K. Sato, T. Ihara","doi":"10.1109/PIMRC.1997.624381","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.624381","url":null,"abstract":"Investigates the effects of antenna radiation patterns at the base station or the remote terminal on the multipath propagation characteristics for the design of millimeter-wave indoor communication systems. These effects were investigated by indoor multipath propagation and BPSK transmission measurements at 60 GHz conducted in a modern office room. Multipath channel characteristics were estimated from impulse responses measured for three types of base-station antennas and for two types of directive terminal antennas with different beam widths. The effects of multipath propagation characteristics on high-speed digital transmission channels were also investigated for almost simultaneously measured bit-error performances at transmission rates of 64, 128, and 256 Mbps. From the results of measurements, the use of directive antennas at the remote terminal and also the use of base station antennas with appropriate radiation patterns were found to be effective for reducing the effect of multipath. It is also found that the reduction of multipath is achieved by the use of circular polarization instead of linear polarization. We also examined the effectiveness of several propagation parameters obtained from multipath propagation measurements for the estimation of the indoor digital transmission characteristics such as bit-error performance.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132493728","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: 9

Comparison of MUSIC and matched filter delay estimators in DS-CDMA DS-CDMA中MUSIC与匹配滤波器延迟估计器的比较

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627002

P. Luukkanen, J. Joutsensalo

引用次数: 11

Multicarrier/QAM-level-controlled adaptive modulation for land mobile communication systems 陆地移动通信系统的多载波/ qam电平控制自适应调制

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627057

K. Hamaguchi, E. Moriyama

引用次数: 3

Optimum non-iterative turbo-decoding 最佳非迭代涡轮解码

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.631161

M. Breiling, L. Hanzo

引用次数: 9

Viterbi decoding differential detection with space diversity for 16DAPSK on Rayleigh fading channels 基于空间分集的16DAPSK瑞利衰落信道Viterbi译码差分检测

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627026

T. Ohtsuki

引用次数: 0

Improving receiver performance for pilot-aided frequency selective CDMA channels using a MMSE switch mechanism and multipath noise canceller 使用MMSE开关机制和多径噪声消除器改善导频辅助频率选择CDMA信道的接收机性能

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627071

Howard C. Huang, I. Chih-Lin

引用次数: 2

Digital stepping correlator in a wideband radio channel measurement system 宽带无线电信道测量系统中的数字步进相关器

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627060

M. Hämäläinen, Asko Nykänen, V. Hovinen, Pentti A. Leppänen

引用次数: 6

Efficient near optimal maximum likelihood symbol timing recovery in digital modems 数字调制解调器中有效的近最优最大似然符号时序恢复

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627001

V. Tuukkanen, J. Vesma, M. Renfors

{"title":"Efficient near optimal maximum likelihood symbol timing recovery in digital modems","authors":"V. Tuukkanen, J. Vesma, M. Renfors","doi":"10.1109/PIMRC.1997.627001","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.627001","url":null,"abstract":"Maximum likelihood (ML) estimation theory provides a general framework for developing optimum timing recovery schemes for digital communication systems. Feedforward schemes based on ML-theory have been shown to have rapid acquisition characteristics. Another important trend is to use digital interpolation for symbol timing adjustment. The so-called Farrow (1988) structure has become popular in this context because it offers an efficient and flexible realization structure for such an interpolation task. In a previous paper Vesma and Tuukkanen (see Proc. IEEE NORSIG 96, Espoo, Finland, p.183-6, 1997) proposed a new feedforward timing estimation scheme which utilizes the Farrow structure efficiently. The scheme is based on a low-order polynomial approximation for the log-likelihood function and also the derivative of this function is available with a small additional computational cost. The performance of the new timing recovery technique was found to be close to ideal even with short symbol block-lengths which is very important in mobile systems. In this paper, we show that this new scheme gives much better results when optimized training sequences are used. The scheme works also with severe multipath distortion channel.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"110 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122628137","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