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Range distance compensation algorithm for assisted GNSS positioning 辅助GNSS定位的距离补偿算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158185
Guanghua Zhang, W. Meng, Jingqiu Ren, Yuwei Shi
{"title":"Range distance compensation algorithm for assisted GNSS positioning","authors":"Guanghua Zhang, W. Meng, Jingqiu Ren, Yuwei Shi","doi":"10.1109/ChinaCom.2011.6158185","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158185","url":null,"abstract":"In this paper a positioning algorithm based on range distance compensation is proposed for the condition of only three visible satellites, making User Equipment (UE) get location information more effective when the quantity of satellites acquired can't satisfy solving condition. Using the structure of Assisted Global Navigation Satellite System (AGNSS) positioning system, UE is guaranteed to acquire navigation information of the three visible satellites rapidly, and with the compensation of range distances between UE and two adjacent base stations, which is obtained from the auxiliary services, the three visible satellites' data constructs a full-rank equation set to achieve positioning. By analyzing positioning results and accuracy, it is indicated that the confidence of this method's positioning error, according to 3GPP request of assisted satellite navigation accuracy error within 50m, reaches 94.56%. The validity of this algorithm is demonstrated, and a novel methodology for researching in AGNSS positioning performance enhancement is proposed.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116017964","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: 0
An improved channel estimation method for NC-OFDM systems in Cognitive Radio context 认知无线电环境下改进的NC-OFDM系统信道估计方法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/CHINACOM.2011.6158137
Jia Min, Gu Xuemai, Wu Qun
{"title":"An improved channel estimation method for NC-OFDM systems in Cognitive Radio context","authors":"Jia Min, Gu Xuemai, Wu Qun","doi":"10.1109/CHINACOM.2011.6158137","DOIUrl":"https://doi.org/10.1109/CHINACOM.2011.6158137","url":null,"abstract":"Non-contiguous OFDM (NC-OFDM) system is popular as its characteristics of avoiding interference by licensed users detection in Cognitive Radio (CR) text. Some traditional channel estimation methods can not be applied to the NC-OFDM systems directly as its non-contiguous subcarrier. The improved time-domain channel estimation method which is different with the traditional LS and DFT channel estimation methods is proposed in this paper. It adopted the spectrum sensing based on CR context at the transmitter and receiver before the IFFT block and after the FFT blocks, respectively. The simulation results verify that the mean square error (MSE) and bit error rate (BER) performance outperform than those of the conventional schemes under the same condition.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117162457","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
A novel medium access control (MAC) protocol for VANETs 一种新的vanet介质访问控制(MAC)协议
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158242
K. A. Hafeez, Lian Zhao, Z. Liao, B. Ma
{"title":"A novel medium access control (MAC) protocol for VANETs","authors":"K. A. Hafeez, Lian Zhao, Z. Liao, B. Ma","doi":"10.1109/ChinaCom.2011.6158242","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158242","url":null,"abstract":"Since vehicular safety applications have strict requirements on reliability and low latency, we propose a novel medium access control protocol (MAC) for VANETs. Cluster heads are elected based on their relative speed and stability on the road with minimal overhead since all clustering information are embedded in control channel's safety messages. We showed that the proposed protocol can support the traffic safety efficiency and reliability and increase the stability of the cluster topology by increasing the cluster head's lifetime and the dwell time of its members.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117352267","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
A novel compressed collaborative sensing scheme using LDPC technique 一种新的基于LDPC技术的压缩协同感知方案
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158295
X. Sun, Zheng Zhou, Lei Shi, Wei-xia Zou
{"title":"A novel compressed collaborative sensing scheme using LDPC technique","authors":"X. Sun, Zheng Zhou, Lei Shi, Wei-xia Zou","doi":"10.1109/ChinaCom.2011.6158295","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158295","url":null,"abstract":"Collaborative spectrum sensing (CSS) can significantly improve the performance of spectrum sensing based on the spatial diversity gain of different cognitive radio (CR). In wideband spectrum sensing scenario, since there might not be enough CRs in the network, or due to hardware limitations, each CR node can only sense a relatively narrow band of radio spectrum. Consequently, the available channel sensing information is far from being sufficient for precisely recognizing the wide range of unoccupied channels. Based on the fact that the spectrum usage information the CR nodes collect has a common sparsity pattern, in this paper, we present a compressed collaborative wideband spectrum sensing scheme in cognitive radio networks. Under the hypothesis of joint sparsity, the CRs need to randomly detect a very small number of sub-channels according to a measurement matrix and send the results to a fusion center. To make the compressed sensing more effective, the scheme uses LDPC-like measurement matrix. Then the whole channel status can be recoverd by the fusion center through a low-complexity message passing algorithm. Numerical results shows that under a joint sparsity model, using the proposed distributed compressed sensing scheme, the CRs make a small number of measurements and get a high probability of detection.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115521994","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
Auxiliary particle filter-based WLAN indoor tracking algorithm 基于辅助粒子滤波的WLAN室内跟踪算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158225
Jun-Hui Han, Lin Ma, Yubin Xu, Zhian Deng
{"title":"Auxiliary particle filter-based WLAN indoor tracking algorithm","authors":"Jun-Hui Han, Lin Ma, Yubin Xu, Zhian Deng","doi":"10.1109/ChinaCom.2011.6158225","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158225","url":null,"abstract":"The particle filter (PF) has been implemented for location tracking in Wireless Local Area Network (WLAN) based indoor positioning system. However, the traditional PF technology is based on the sampling importance resampling (SIR), which has the inherent blindness. Therefore, its tracking performance in WLAN indoor environment is degraded. The auxiliary particle filter (APF) can solve this problem very well by making use of the current observation information during the production of new particles, so this paper employs the auxiliary particle filter (APF) for location tracking in WLAN fingerprinting positioning system to improve the WLAN indoor tracking performance. In the simulation, the weighted k-nearest neighbors method (WKNN) is chosen as the fingerprinting positioning algorithm. Simulation results show that APF based tracking algorithm performs better than PF based tracking algorithm. The APF based WLAN indoor tracking algorithm decreases the mean tracking error by 7.7% and 26.9% than PF based tracking algorithm and WKNN algorithm respectively.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"927 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253621","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
A modified algorithm of synchronization signal detection for LTE initial cell search LTE初始小区搜索中同步信号检测的改进算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158342
Yukai Gao, Gang Zhu, Xia Chen, Di Wu, Buri Ban
{"title":"A modified algorithm of synchronization signal detection for LTE initial cell search","authors":"Yukai Gao, Gang Zhu, Xia Chen, Di Wu, Buri Ban","doi":"10.1109/ChinaCom.2011.6158342","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158342","url":null,"abstract":"For the Long Term Evolution (LTE) system in 3rd Generation Partnership Project (3GPP), the calculation of synchronization signal detection algorithm is very complex. According to the properties of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), a modified algorithm is proposed in this paper, which processes correlation of the received samples only once with sum of local PSS sequences to obtain the position of PSS and detects the position of SSS previously to reduce the times of SSS detection. The theoretical derivation and complexity of both conventional and modified algorithms are derived and compared. It comes to the conclusion that the modified algorithm can reduce at least 60% calculation. Finally through simulation, the algorithm has excellent performance in high mobility channel model Spatial Channel Model Extended (SCME).","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115322714","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: 12
Cognitive Radio adaptation decision engine based on binary quantum-behaved particle swarm optimization 基于二元量子粒子群优化的认知无线电自适应决策引擎
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158152
Jing Zhang, Zheng Zhou, Wanxin Gao, Yingjie Ma, Y. Ye
{"title":"Cognitive Radio adaptation decision engine based on binary quantum-behaved particle swarm optimization","authors":"Jing Zhang, Zheng Zhou, Wanxin Gao, Yingjie Ma, Y. Ye","doi":"10.1109/ChinaCom.2011.6158152","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158152","url":null,"abstract":"Cognitive Radio decision engine is a key technology in cognitive communication system. It can optimize transmission parameters according to the environment, and obtain the desired communication performance through multi-objective optimization algorithm. In this paper, we analyze the Cognitive Radio decision engine based on OFDM system, and introduce a binary quantum-behaved particle swarm optimization algorithm (BQPSO), which has stronger optimal searching ability and faster convergence speed. Because quantum effect has the excellent characteristics of nonlinearity and uncertainty, it can reach better optimize performance than other optimization algorithms. Based on OFDM system, the simulation results show that BQPSO algorithm has a good performance in convergence, speed, and average fitness value. The optimization performance can greatly satisfy the demand of cognitive radio decision engine.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115721348","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: 7
Traditional distributed power control algorithms for Cognitive Radio Network 传统的认知无线网络分布式功率控制算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158235
Mohamed Elalem, Lian Zhao
{"title":"Traditional distributed power control algorithms for Cognitive Radio Network","authors":"Mohamed Elalem, Lian Zhao","doi":"10.1109/ChinaCom.2011.6158235","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158235","url":null,"abstract":"In order to utilize the spectrum efficiently, the FCC announced Cognitive Radio (CR) technology as a candidate to implement negotiated or opportunistic spectrum sharing. It has received a great attention due to the ability to improve the spectrum utilization. In such a CR network, power control can increase the efficiency by adjusting the transmission power of the secondary users (SU). In this paper, we propose an adaptive distributed power control scheme for CR networks where the conventional power control schemes used in cellular system are modified to be used in cognitive radio network to consider the QoS requirements of both the Primary User (PU) and the SU simultaneously. Since the transmission power of each SU is constrained so that the interference temperature at the primary receiver caused by all SUs does not exceed the interference tolerance of the PU. As a result, the QoS requirement for the PU is always guaranteed.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116232948","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
Load balancing between TD-SCDMA and GSM systems with asymmetric traffics 具有非对称流量的TD-SCDMA和GSM系统之间的负载均衡
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158165
Liang Lei, Aiping Huang, Cunqing Hua, Zhouyun Wu, Jun Qian, Liang Shen, Xinwei Chen, Yusheng Zhang
{"title":"Load balancing between TD-SCDMA and GSM systems with asymmetric traffics","authors":"Liang Lei, Aiping Huang, Cunqing Hua, Zhouyun Wu, Jun Qian, Liang Shen, Xinwei Chen, Yusheng Zhang","doi":"10.1109/ChinaCom.2011.6158165","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158165","url":null,"abstract":"Load balancing between heterogeneous TD-SCDMA and GSM systems with asymmetric traffics is investigated in this paper. The uniform measurement of the system loads, the principle and steps of handoff-based load balancing algorithm are described for the heterogeneous systems with unequal user capacities. The load relation between TD-SCDMA and GSM systems carrying asymmetric services is classified into four cases. For each case, trigger condition of handoff operation, the traffic volume to be migrated and the criteria of selecting users to be migrated are analyzed. Simulation results show that the algorithm can make the loads of the systems more balanced and the performance of the system with higher load is improved effectively.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127433404","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
An exhaustive entropy based SLM method for PAPR reduction of OFDM systems 一种基于穷举熵的SLM方法用于OFDM系统的PAPR降低
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158131
Lei Ning, Zhenyong Wang, Mingchuan Yang, Qing Guo
{"title":"An exhaustive entropy based SLM method for PAPR reduction of OFDM systems","authors":"Lei Ning, Zhenyong Wang, Mingchuan Yang, Qing Guo","doi":"10.1109/ChinaCom.2011.6158131","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158131","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is an attractive technology to provide immense improvements in wireless transmission capacity but high peak-to-average power ratio (PAPR) is a major drawback of OFDM system. Selected mapping (SLM) scheme has good performance for PAPR reduction. It requires the transmitting data to be multiplied by random phase sequences. However, the sequences are pseudo-random which will decrease the method effectiveness. Exhaustive entropy is introduced in this paper which can identify the strength of random phase sequences property. Then an exhaustive entropy based SLM method is proposed. The scheme improves the effectiveness of random phase sequences by selecting the larger exhaustive entropy of them. Simulation results show that the PAPR reduction performance is better than that of conventional SLM through this method.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125325250","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: 6
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