1994 IEEE GLOBECOM. Communications: The Global Bridge最新文献_第9页

Linearization of power amplifiers modelling and simulations 功率放大器的线性化建模与仿真

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513018

V. Soula, F. Gourgue

引用次数: 10

Clock stability measure dependence on time error sampling period 时钟稳定性测量依赖于时间误差采样周期

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513017

S. Bregni, M. Carbonelli, D. de Seta, D. Perucchini, G. Zampilloni

引用次数: 4

On pilot symbol assisted detection of MSK and GTFM in fast fading channels 快速衰落信道中导频符号辅助MSK和GTFM检测

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.512802

P. Ho, J. H. Kim

引用次数: 5

Optimal finite duration pulses for OFDM OFDM的最优有限持续时间脉冲

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513418

A. Vahlin, N. Holte

引用次数: 207

PCS micro-cells insensitive to propagation medium PCS微细胞对繁殖介质不敏感

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513303

S. Faruque

引用次数: 6

High-performance processing of traffic data for service operation systems 业务运营系统流量数据的高性能处理

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.512859

Hiroshi Arimichi, Kazuhiko Ohkubo, Makoto Jinguji

引用次数: 0

Call processing data in intelligent network elements and traditional switching systems 智能网元和传统交换系统中的呼叫处理数据

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.512856

I. Amir-Ebrahimi, D.A. Frech

引用次数: 1

Vector quantization of harmonic magnitudes for low-rate speech coders 用于低速率语音编码器的谐波幅度矢量量化

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.512716

P. Lupini, V. Cuperman

{"title":"Vector quantization of harmonic magnitudes for low-rate speech coders","authors":"P. Lupini, V. Cuperman","doi":"10.1109/GLOCOM.1994.512716","DOIUrl":"https://doi.org/10.1109/GLOCOM.1994.512716","url":null,"abstract":"Several techniques for speech coding at rates of 4 kb/s and lower require quantization of spectral magnitudes at a set of frequencies which are harmonics of the fundamental pitch period of the talker (for example: multiband excitation coding, sinusoidal transform coding, and time-frequency interpolation). The number of harmonic magnitudes to be quantized depends on the fundamental frequency value and hence is variable, changing from frame to frame. The variable number of components to be quantized makes it difficult to use fixed-dimension vector quantization for harmonic magnitude encoding. In this paper, we introduce a quantization technique called non-square transform vector quantization (NSTVQ) which uses a fixed-dimension vector quantizer combined with a variable-size non-square transform which maps the variable-dimension harmonic magnitude vector into a fixed-dimension vector. The optimal reconstruction procedure for non-square transforms is derived and shown to be equivalent to an optimal least-square estimation procedure. The proposed technique is evaluated experimentally as part of a new coding system called spectral excitation coding (SEC). The results are compared to an existing technique which estimates the spectral shape using all-pole modeling followed by vector quantization of the LSP parameters.","PeriodicalId":323626,"journal":{"name":"1994 IEEE GLOBECOM. Communications: The Global Bridge","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126543940","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: 21

Performance of the cross-correlator receiver for binary digital frequency modulation 二进制数字调频用交叉相关接收机的性能

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513496

K. A. Farrell, P. McLane

{"title":"Performance of the cross-correlator receiver for binary digital frequency modulation","authors":"K. A. Farrell, P. McLane","doi":"10.1109/GLOCOM.1994.513496","DOIUrl":"https://doi.org/10.1109/GLOCOM.1994.513496","url":null,"abstract":"The error probability of the cross-correlator receiver for binary digital frequency modulation (FM) is studied using theoretical analysis and computer simulations. The bit error rate (BER) results obtained permit the selection of an optimum combination of modulation index and receiver bandwidth. The BER performance of the cross-correlator is compared to that of the limiter-discriminator and found to be similar. This is noteworthy because the structure of the cross-correlator is ideally suited to DSP chip implementation and furthermore severe amplitude limiting does not have to be performed on the input signal to the receiver. Input signal amplitude variations of up to 20% of the average signal value can be tolerated with a 1 dB loss in performance. The receiver structure has the same form as for QPSK or QAM modulation. Thus a generalized demodulator that would demodulate QPSK, QAM or digital FM can be realized. The theoretical analysis [Farrell, 1993] of the receiver uses a Fourier series approach [Tjhung and Whittke, 1970] which takes into account the effects of FM distortion and intersymbol interference (ISI). Theoretical and simulation results are found to agree within 0.5 dB in E/sub b//N/sub o/. The authors also address the issue of timing recovery. Results obtained indicate that losses due to timing error can be reduced to less than 0.5 dB in E/sub b//N/sub o/.","PeriodicalId":323626,"journal":{"name":"1994 IEEE GLOBECOM. Communications: The Global Bridge","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129323513","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: 23

Bitrate management in ATM systems using recurrent neural networks 基于递归神经网络的ATM系统比特率管理

1994 IEEE GLOBECOM. Communications: The Global Bridge Pub Date : 1994-11-28 DOI: 10.1109/GLOCOM.1994.513178

T. Necker, T. Renger, H. Kroner

引用次数: 4