2012 Australian Communications Theory Workshop (AusCTW)最新文献

Coding for multiple packets in erasure networks 在擦除网络中对多个数据包进行编码

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164916

Hamid Dadkhahi, T. Chan, I. Land

引用次数: 1

Voice activity classification using beamformer-output-ratio 基于波束形成-输出比的语音活动分类

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164913

N. T. Tran, W. Cowley, A. Pollok

{"title":"Voice activity classification using beamformer-output-ratio","authors":"N. T. Tran, W. Cowley, A. Pollok","doi":"10.1109/AusCTW.2012.6164913","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164913","url":null,"abstract":"In a conversation between multiple speakers, each person participates in the speech at different times. Therefore the active speakers in each speech segment are unknown. However, identifying the voice activity (VA) of the speakers of interest is required for adaptive beamforming techniques such as minimum variance distortionless response beamforming and the adaptive blocking beamforming (AB). Considering two speakers, this paper addresses a voice activity classification (VAC) problem that focuses on identifying the active speaker(s) in each speech segment. The proposed method is based on a new concept, the beamformer-output-ratio (BOR). This value is calculated from the outputs of two different beamformers steering at two speakers. The first part of the paper introduces the definition of BOR, the VAC method using BOR and simulation results. The simulations are based on real recordings and show a high classification accuracy. In the second part of the paper, the theoretical results of the BOR of the delay-and-sum (DS) beamforming are presented, including BOR formula derived in different environments and its behaviour in relation to parameter errors.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014941","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

Design of an error-free perfect secrecy system for unknown inputs 针对未知输入的无差错完美保密系统的设计

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164914

Chinthani Uduwerelle, Siu-Wai Ho, T. Chan

引用次数: 1

RF fingerprint extraction from the energy envelope of an instantaneous transient signal 射频指纹从能量包络中提取瞬时瞬态信号

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164912

S. Rehman, K. Sowerby, C. Coghill

引用次数: 78

On the robustness of algebraic STBCs to coefficient quantization 代数stbc对系数量化的鲁棒性

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164906

J. Harshan, E. Viterbo

引用次数: 5

Tractable model for heterogeneous cellular networks with directional antennas 定向天线异构蜂窝网络的可处理模型

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164907

He Wang, M. Reed

引用次数: 30

Distribution of the sum of a complex Gaussian and the product of two complex Gaussians 一个复高斯分布和两个复高斯分布的乘积的分布

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164918

T. Betlehem, A. Coulson

引用次数: 11

The UKF-based RNN predictor for GPS narrowband interference suppression 基于ukf的GPS窄带干扰抑制RNN预测器

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164898

W. Mao, Wei-Ming Wang, J. Sheen, Po-Hung Chen

{"title":"The UKF-based RNN predictor for GPS narrowband interference suppression","authors":"W. Mao, Wei-Ming Wang, J. Sheen, Po-Hung Chen","doi":"10.1109/AusCTW.2012.6164898","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164898","url":null,"abstract":"The global positioning system (GPS) provides accurate positioning and timing information useful in many applications. Although DS-SS inherently can cope with low power narrowband and wideband obstacles by its near 43-dB processing gain, it cannot cope with high power obstacles. The approaches of system performances that can be further enhanced by preprocessing to reject the intentional or unintentional jamming will be investigated in this paper. A recurrent neural network (RNN) predictor for the GPS anti-jamming applications will be proposed. The adaptive RNN predictor is utilized to accurately predict the narrowband waveform based on an unscented Kalman filter (UKF)-based algorithm. The UKF is adopted to achieve better performance in terms of convergence rate and quality of solution. Two types of narrowband interference, i.e. continuous wave interference (CWI) and auto regressive interference (ARI), are considered to emulate realistic circumstances. The signal-to-noise ratio (SNR) is varied from -20 to -5 dB. The anti-jamming performances are evaluated via extensive simulation by computing mean squared prediction error (MSPE) and signal-to-noise ratio (SNR) improvements.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129840778","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: 8

Distributed switch-and-examine combining with threshold-based relaying 分布式开关检测与基于阈值的继电器相结合

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164899

Prasanna Herath, U. Gunawardana, R. Liyanapathirana

{"title":"Distributed switch-and-examine combining with threshold-based relaying","authors":"Prasanna Herath, U. Gunawardana, R. Liyanapathirana","doi":"10.1109/AusCTW.2012.6164899","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164899","url":null,"abstract":"We study the distributed switch-and-examine combining with threshold-based relaying (DSEC-T). In this scheme, relay selection is performed in a similar fashion to switch-and-examine combining (SEC) considering the source-relay channel signal-to-noise ratio (SNR) in conjunction with threshold-based relaying. In particular, the same relay remain selected as long as its SNR is above a predefined threshold; should this condition be violated, the remaining relays are tested against the threshold in a predefined order. This testing process is repeated until either an acceptable relay is found or no relay is left to be examined. In the latter case none of the relay is chosen for communication. On the other hand, if an acceptable relay is identified, the switch-and-examine process is interrupted and the identified relay assists the source-destination communication working as an amplify-and-forward (AF) relay. Lower bounds for the outage probability and symbol error rate (SER) are derived assuming Rayleigh multi-path fading channels. Numerical results demonstrate that the proposed DSEC-T scheme achieves the same diversity order as the partial relay selection (PRS) where the best relay is selected based on source-relay SNR for earch transmission.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123923932","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: 3

A near optimal Viterbi algorithm based routing scheme for multi-hop relay networks 基于近最优Viterbi算法的多跳中继网络路由方案

2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164923

Q. You, Yonghui Li, Md. Shahriar Rahman, Zhuo Chen

引用次数: 5