2013 International Conference on Wireless Communications and Signal Processing最新文献_第4页

A MWM relay assignment strategy based on spectrum availability for cognitive radio networks 认知无线网络中基于频谱可用性的MWM中继分配策略

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677223

Tianwei Cao, Wei Xie, Cong Wang, Youyun Xu

引用次数: 0

A rateless encoder with adaptive symbol removal for AWGN and fading channels 一种用于AWGN和衰落信道的自适应符号去除的无速率编码器

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677260

K. Tu, Zhaoyang Zhang, Chuangmu Yao, Shaolei Chen

{"title":"A rateless encoder with adaptive symbol removal for AWGN and fading channels","authors":"K. Tu, Zhaoyang Zhang, Chuangmu Yao, Shaolei Chen","doi":"10.1109/WCSP.2013.6677260","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677260","url":null,"abstract":"In this paper, we propose a novel symbols removal encoding (SRE) raptor code over binary additional white gaussian noise (BIAWGN) channel and fading channel. By calculating the theoretical logarithmic likelihood ratios (LLR) messages that each input symbol accumulates in the encoding process and removing those input symbols whose LLR messages are enough for successful decoding from the latter encoding process in the SRE scheme, the LLR messages from the channel can be allocated more properly among the input symbols and thus the SRE Raptor code can achieve better decoding performance than conventional Raptor code. By analyzing raptor code based on extrinsic information transfer charts (EXIT) under Gaussian approximation, we propose the method to calculate the theoretical LLR messages of each input symbol and design the proper threshold to remove the symbols. Finally the simulation results show that the SRE Raptor code can achieve better decoding performance obviously both over BIAWGN channel and fading channel compared with conventional raptor code and the equal degree encoding (EDE) Raptor code.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130149039","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

Performance of turbo FDE using two-dimensional LMMSE based iterative decision-directed channel estimation for DFT-precoded OFDMA 基于二维LMMSE迭代决策导向信道估计的dft预编码OFDMA turbo FDE性能

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677257

Chihiro Mori, T. Kawamura, N. Miki, M. Sawahashi

{"title":"Performance of turbo FDE using two-dimensional LMMSE based iterative decision-directed channel estimation for DFT-precoded OFDMA","authors":"Chihiro Mori, T. Kawamura, N. Miki, M. Sawahashi","doi":"10.1109/WCSP.2013.6677257","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677257","url":null,"abstract":"This paper presents the average block error rate (BLER) performance for linear minimum mean-square error (LMMSE) based iterative decision-directed channel estimation (IDDCE) associated with the turbo frequency domain equalizer (FDE) for discrete Fourier transform (DFT)-precoded Orthogonal Frequency Division Multiple Access (OFDMA). In the proposed IDDCE, estimated channel responses, which are used for weights of feed-forward and decision feedback FDEs, are iteratively updated using an accurate 2-dimensional LMMSE algorithm at each iteration of the turbo FDE. Through computer simulations, we clarify the best window size for the 2-dimensional LMMSE algorithm assuming the 9-path Extended Typical Urban (ETU) channel model and the maximum Doppler frequency of up to approximately 220 Hz. The computer simulations show that the 2-dimensional LMMSE based IDDCE is effective in decreasing the required average received signal-to-noise power ratio (SNR) satisfying the target average BLER for the turbo FDE in a frequency-selective Rayleigh fading channel with low-to-high maximum Doppler frequencies and with a wide range of root mean square delay spread values.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129048597","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: 1

ToF depth map guided passive stereo based on KNN searching 基于KNN搜索的ToF深度图引导被动立体

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677227

Liwen Liu, Lianghao Wang

引用次数: 2

Free-space optical communications using all-optical relays over weak turbulence channels with pointing errors 在带有指向误差的弱湍流信道上使用全光中继的自由空间光通信

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677121

Jin-yuan Wang, Jun-Bo Wang, Ming Chen, Qing-Song Hu, Nuo Huang, Rui Guan, Linqiong Jia

引用次数: 6

Maximum likelihood SNR estimator for coded MAPSK signals in slow fading channels 慢衰落信道中编码MAPSK信号的最大似然信噪比估计

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677047

Zhixin Li, Dewei Yang, Hua Wang, N. Wu, Jingming Kuang

引用次数: 5

A new multi-channel loudness compensation method based on high frequency compression and shift for digital hearing aids 一种基于高频压缩移位的数字助听器多声道响度补偿方法

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677045

Xulai Cao, Linghua Zhang, Wanzhen Gao

{"title":"A new multi-channel loudness compensation method based on high frequency compression and shift for digital hearing aids","authors":"Xulai Cao, Linghua Zhang, Wanzhen Gao","doi":"10.1109/WCSP.2013.6677045","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677045","url":null,"abstract":"At the present, multi-channel compensation is used in most of digital hearing aids. But high compensation will decrease hearing comfort, even result in negative impact when attenuation is serious. In order to improve the listening recognition of hearing-impaired patients with severe loss of high-frequency hearing, this paper proposed a new method which uses frequency compression and shift techniques for multi-channel loudness compensation. This method could reduce the negative impact during conventional loudness compensation. Firstly, high frequency portion of voice signal is compressed and shifted to the target frequency band. Then, the signal is divided into four unequal size bands via Quadrature Mirror Filter Bank. According to different hearing-impaired patients, the identity of the signal on each band is compensated and controlled. At last, the processed signal is reconstructed using perfect reconstruction filter banks. By using the proposed method, the identity of the signal is enhanced obviously and the voice is restricted within earshot of the hearing-impaired listeners. The result of the actual test of Ling'6 tone shows that the recognition rate of the voiceless increases 30 percent than conventional method. The experiment and simulation indicate that the proposed method has high practical value and improves hearing level and identification of hearing-impaired listeners, especially for voice with abundant high frequency.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114232095","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

Pareto-optimal power allocation of device-to-device communication with two-way decode-and-forward helping relay 具有双向解码转发帮助中继的设备对设备通信的帕累托最优功率分配

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677163

Yiyang Ni, Shi Jin, Hongbo Zhu, S. Shao, Kai‐Kit Wong

引用次数: 3

PSO-based LED deployment optimization for visible light communications 可见光通信中基于pso的LED部署优化

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677122

Rui Guan, Jin-yuan Wang, Yun-Peng Wen, Jun-Bo Wang, Ming Chen

引用次数: 13

Load Adaptive Dynamic Mapping for video streaming over IEEE 802.11e network IEEE 802.11e网络视频流负载自适应动态映射

2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677187

YU Peng, Lianghui Ding, Liang Qian, Feng Yang

引用次数: 1