检索结果-内蒙古大学图书馆

6th International Conference on Telecommunication in Modern Cable, Satellite and Broadcasting Services

作者： Drajic, D Ericsson DOO Belgrade Serbia Monteneg Yugoslavia

ISBN: (纸本)0780379632

In this paper, some results of an extensive simulation study concerning the efficiency of turbo coding in downlink WCDMA receivers using two type of chip level equalizers - one common pilot channel-trained, the other prefilter-RAKE - are presented. Their performances are compared to the performances of the conventional RAKE receiver under various scenarios. Special consideration is given to the number of iterations needed for an efficient turbo decoding.

关键词： turbo-coding iterations downlink WCDMA chip-level equalizers

来源：评论

学校读者我要写书评

暂无评论

Lower FER bounds based on gilbert channel model for 3G (WCDMA) systems using turbo-coding

Lower FER bounds based on gilbert channel model for 3G (WCDM...

引用

8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services

作者： Drajic, Dejan V Popovica 6 Belgrade Serbia

In this paper the probabilities of the corresponding lower bounds for FER in 3G (WCDMA) systems using turbo-coding are evaluated approximately using Gilbert channel model. Parameters of the model are found using BER a... 详细信息

ISBN: (纸本)9788685195549

关键词： WCDMA FER turbo-coding lower bounds

来源：评论

学校读者我要写书评

暂无评论

FER and channel interleavers in 3G (WCDMA) systems using turbo-coding

<i>FER</i> and channel interleavers in <i>3G (WCDMA)</i> sys...

引用

7th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services

作者： Drajic, D Ericsson Doo Belgrade Serbia Monteneg

ISBN: (纸本)0780391640

In this paper the interleaving gain, due to the channel interleavers, corresponding to BER (Bit Error rate) and FER (Frame Error Rate) in an advanced 3G (WCDMA) receiver, using chip level equalizer and turbo coding, is analyzed by simulation. The waterfall region is considered. The conventional RAKE receiver is used as a reference. MAI (Multiple Access Interference), usually modelled as an additive white Gaussian noise, is simulated by generating signals of other users strictly according to the standards. The simulation results for both receivers (RAKE and advanced one) show that channel interleavers enhance performance considerably.

关键词： WCDMA FER turbo-coding channel interleavers

来源：评论

学校读者我要写书评

暂无评论

EXIT Chart Analysis of turbo Compressed Sensing Using Message Passing Dequantization

引用

IEEE TRANSACTIONS ON SIGNAL PROCESSING 2016年第24期64卷 6600-6612页

作者： Movahed, Amin Reed, Mark C. Aboutorab, Neda Tajbakhsh, Shahriar Etemadi Univ New South Wales Sch Engn & Informat Technol Canberra NSW 2052 Australia Univ Oxford Dept Engn Sci Oxford OX1 3PJ England

We propose a joint compressed sensing-based encoding and an iterative-decoding method, which we call turbo compressed sensing (turbo-CS), for the robust to noise transmission of sparse signals over an additive white Gaussian noise (AWGN) channel. The turbo-CS encoder applies 1-bit compressed sensing as a source encoder concatenated serially with a convolutional channel encoder. At the turbo-CS decoder, an iterative joint source-channel decoding method is proposed for signal reconstruction. We analyze, for the first time, the convergence of the turbo-CS decoder by determining an extrinsic information transfer chart of the constituent decoders. We modify the soft-outputs of the constituent source decoder to improve the signal reconstruction performance of the turbo-CS decoder. Our results show that for a fixed received signal to noise ratio (RSNR) of 10 dB more than 5 dB of improvement in the channel SNR is achieved after six iterations of the turbo-CS decoder. Alternatively, for a fixed SNR of -1 dB, 10 dB improvement in RSNR is achieved. Moreover, it is shown that the turbo-CS decoder outperforms the state-of-the-art algorithms for 1-bit compressed sensing reconstruction in the presence of AWGN channel in terms of signal reconstruction performance and complexity.

关键词： turbo-coding 1-bit compressed sensing joint source-channel decoding message passing de-quantization

来源：评论

学校读者我要写书评

暂无评论

Enhanced Soft-Handover for DS-CDMA Systems using Complementary Error Correction Codes

Enhanced Soft-Handover for DS-CDMA Systems using Complementa...

引用

69th IEEE Vehicular Technology Conference

作者： El Aoun, Moustapha Ould Siala, Mohamed Boujemaa, Hatem High Sch Commun Tunis TECHTRA Res Unit El Ghazala 2083 Ariana Tunisia

ISBN: (纸本)9781424425167

In order to enhance soft-handover performance in the downlink of DS-CDMA systems, we propose to use different codes at the base stations in the active set to encode the information sequence targeted to a mobile station. For reliable information recovery, in case all links except one happen to be simultaneously in deep fade, self-decodable complementary punctured convolution codes, inspired from Hybrid ARQ III, are used. When turbo-decoding is feasible at the mobile station, new complementary codes, using different interleavers followed by a common systematic recursive convolutional encoder, are proposed for an additional enhancement in performance. Experimental evaluation of the enhancement in performance provided by complementary coding is carried for both Gaussian and multipath Rayleigh fading channels. The proposed coding schemes can provide very significant gains. In some cases, gains around 4 dB can be achieved.

关键词： Soft-handover DS-CDMA Complementary punctured convolutional codes turbo-coding

来源：评论

学校读者我要写书评

暂无评论

Fading effects on turbo-encoded data

Fading effects on turbo-encoded data

引用

8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services

作者： Marcu, Ioana Halunga, Simona Fratu, Octavian Vizireanu, Dragon Univ Politehn Bucuresti Fac Elect Telecomm & Informat Technol Bd Iuliu Maniu 1-3 Bucharest 061071 6 Romania

ISBN: (纸本)9788685195549

This paper investigates, based on an interactive Matlab simulation, the turbo encoder and decoder parameters design effects on the overall system performances. Several results are highlighted with respect to different parameter influence, on system performances and complexity in the absence/presence of Rayleigh / Rice fading with /without Doppler shift. The results and some interesting conclusions regarding different configurations behavior in the presence of fading will be presented.

关键词： turbo-coding Rayleigh/Rice fading doppler shift error probability

来源：评论

学校读者我要写书评

暂无评论

Impact of Spreading Factor on turbo-coded Multi-code MC-CDMA using ICI cancellation

Impact of Spreading Factor on Turbo-coded Multi-code MC-CDMA...

引用

14th Asia-Pacific Conference on Communications

作者： Yui, Tatsunori Tomeba, Hiromichi Adachi, Fumiyuki Tohoku Univ Grad Sch Engn Dept Elect & Commun Engn Aoba Ku Sendai Miyagi 9808579 Japan

ISBN: (纸本)9784885522321

Multi-carrier code division multiple access (MC-CDMA) is one of promising broadband wireless access techniques. Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can take advantage of the channel frequency-selectivity and improve the average bit error rate (BER) performance of single-code MC-CDMA due to frequency-diversity gain. However, as the code multiplexing order is increased so as to increase the data rate without bandwidth expansion, the presence of residual inter-code interference (ICI) degrades the transmission performance. Recently, we proposed a frequency-domain adaptive interference cancellation (FDAIC) technique to mitigate the residual ICI and showed that the full code multiplexed MC-CDMA with FDAIC achieves better performance than orthogonal frequency division multiplexing (OFDM). However, the impact of spreading factor was not discussed. In this paper, we evaluate, by computer simulation, the average BER and throughput performances of turbo-coded MC-CDMA with FDAIC for different values of spreading factor, and show that the full-code multiplexed MC-CDMA with FDAIC using the full spreading factor (equal to the number of subcarriers) can provide almost the same or better transmission performance than OFDM.

关键词： MC-CDMA code-multiplexing interference cancellation turbo-coding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：