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Tradeoffs between BER performance and PAPR reduction for broadband OFDM transmission with signal processing 带信号处理的宽带OFDM传输BER性能与PAPR降低之间的权衡
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088151
Xiao Huang, Jianhua Lu, Junli Zheng
{"title":"Tradeoffs between BER performance and PAPR reduction for broadband OFDM transmission with signal processing","authors":"Xiao Huang, Jianhua Lu, Junli Zheng","doi":"10.1109/WPMC.2002.1088151","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088151","url":null,"abstract":"In this paper, we study a transform-based method for its application in the reduction of peak-to-average power ratio (PAPR) of the OFDM signals. By compressing large signals while enhancing small signals suitably according to the statistical property of OFDM signals, this method can compromise well the reduction in PAPR with bit error rate (BER) performance of the broadband OFDM system.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127249172","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
Channel estimation for high-speed packet-based OFDM communication systems 高速分组OFDM通信系统的信道估计
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088388
Wookwon Lee, Jie Zhu
{"title":"Channel estimation for high-speed packet-based OFDM communication systems","authors":"Wookwon Lee, Jie Zhu","doi":"10.1109/WPMC.2002.1088388","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088388","url":null,"abstract":"In orthogonal frequency division multiplexing (OFDM) based packet communication systems, it is desired to minimize the number of pilot symbols for better spectrum utilization. Also, accurate channel estimation is required for coherent demodulation of OFDM signals, particularly when modulated by multilevel modulation schemes. In this paper, we present a pilot-assisted decision-directed channel estimation technique suitable for packet transmission with relatively short OFDM symbols. Simulation has shown that our approach can save about 20% of the number of pilot symbols required in the conventional least square estimator for a situation considered in this paper.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123390642","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
Resource efficient streaming bearer concept for GERAN GERAN的资源高效流承载概念
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088299
A. Schieder, H. Ekstrom, H. Nyberg, C. Johansson, P. de Bruin, H. Nordstrom
{"title":"Resource efficient streaming bearer concept for GERAN","authors":"A. Schieder, H. Ekstrom, H. Nyberg, C. Johansson, P. de Bruin, H. Nordstrom","doi":"10.1109/WPMC.2002.1088299","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088299","url":null,"abstract":"We present a complete concept for providing a resource efficient bearer service for streaming applications in the GSM/EDGE Radio Access Network, GERAN. The concept comprises rules for admission control, service quality monitoring functions and appropriate means to ensure that the service quality stays within the envisaged bounds. Results indicate that the achievable capacity is close to what could be expected from streaming over a best effort bearer, while at the same time QoS guarantees can be fulfilled, ensuring high end-user quality.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126633941","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
Estimating the site requirements for 3G multimedia services 估算3G多媒体业务的站点需求
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088369
S. Allen, L. Hodge, S. Hurley, R. Whitaker
{"title":"Estimating the site requirements for 3G multimedia services","authors":"S. Allen, L. Hodge, S. Hurley, R. Whitaker","doi":"10.1109/WPMC.2002.1088369","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088369","url":null,"abstract":"In this paper we describe the problem of determining the site requirements for 3G multimedia services. Estimating the minimum number of sites required to provide sufficient coverage and capacity is vital for network planning purposes. We demonstrate how link budget analysis can be used in conjunction with capacity constraints to estimate site requirements, taking into account mobility requirements and other factors dictated by the service mix.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122355875","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: 5
A hexagonal antenna array prototype for adaptive system application 用于自适应系统应用的六角形天线阵列原型
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088277
L. Kretly, A. Cerqueira S., A. Tavora AS
{"title":"A hexagonal antenna array prototype for adaptive system application","authors":"L. Kretly, A. Cerqueira S., A. Tavora AS","doi":"10.1109/WPMC.2002.1088277","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088277","url":null,"abstract":"Adaptive antennas arrays have been recognized as an excellent method to improve the performance of the next generation of wireless communication systems. This work describes the optimization of a novel array prototype with seven patch elements in a hexagonal arrangement. With this structure it is possible to configure the radiation pattern to obtain directional patterns with high directivity and gain. An electromagnetic simulation tool, ZELAND IE3D, was used to evaluate and optimize the antenna array design for applications at 1.9 GHz. The preliminary return loss measurements indicate that this hexagonal arrangement is suitable for wireless communications applications.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122464737","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
Building penetration loss at 2 GHz for mobile communications at high elevation angles by HAPS HAPS在高仰角移动通信中建立2ghz穿透损耗
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088177
D. Axiotis, M. Theologou
{"title":"Building penetration loss at 2 GHz for mobile communications at high elevation angles by HAPS","authors":"D. Axiotis, M. Theologou","doi":"10.1109/WPMC.2002.1088177","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088177","url":null,"abstract":"We examine the building penetration loss at 2 GHz in the case of high altitude platform stations (HAPS). The HAPS system will be used for 3G mobile communications. In order to investigate outdoor to indoor propagation at the high elevation angles involved in this system, we developed a 3-D ray tracing tool. The tool was used for the case of a block of 9 buildings in a Manhattan scenario and the building penetration loss was calculated at several elevation angles. It is concluded that the penetration loss is an increasing function of the elevation angle.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"342 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122146950","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
Mobility independent medium access control in support of multimedia 移动独立的媒体访问控制，支持多媒体
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088309
V. Syrotiuk, M. Sevugan
{"title":"Mobility independent medium access control in support of multimedia","authors":"V. Syrotiuk, M. Sevugan","doi":"10.1109/WPMC.2002.1088309","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088309","url":null,"abstract":"The time-spread multiple-access (TSMA) family of medium access control (MAC) protocols provides guaranteed channel access to each node within a deterministically bounded delay (see Chlamtac, I. and Farago, A., IEEE/ACM Trans. on Networking, vol.2, no.1, p.23-9, 1994; Chlamtac et al., ACM/IEEE Trans. on Networking, vol.5, no.6, p.804-12, 1997). In TSMA, the delay bound grows only logarithmically with network size, N, but quadratically with the maximum node degree, D: O(D/sup 2/ (log/sup 2/ N/log/sup 2/ D)). We propose the use of a topology control algorithm to bound the maximum node degree within a mobile ad hoc network which can otherwise vary widely due to mobility. We show that when TSMA runs on top of a network whose topology is controlled, it is an ideal MAC protocol to support multimedia applications.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129746321","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 robust frequency acquisition algorithm for OFDM systems 一种用于OFDM系统的鲁棒频率采集算法
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088149
Wen Lei, Tao Tao, Jianhua Lu
{"title":"A robust frequency acquisition algorithm for OFDM systems","authors":"Wen Lei, Tao Tao, Jianhua Lu","doi":"10.1109/WPMC.2002.1088149","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088149","url":null,"abstract":"In this paper, we present a novel frequency synchronization algorithm with an adaptive weighting technique for OFDM systems over time varying fading channels. Specifically, by combining frequency offset estimations from different preambles carefully, an optimal frequency offset estimation can be achieved. Moreover, two simplified schemes with reduced complexity are further contrived. Simulation results show that the proposed algorithm significantly improves the performance of frequency offset estimation compared to the conventional schemes.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129957854","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
Practical subchannel power controlled OFDM system under time-varying multipath channel 时变多径信道下实用的子信道功率控制OFDM系统
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088331
Hongku Kang, W. Hwang, Kiseon Kim, Yeongyoon Choi
{"title":"Practical subchannel power controlled OFDM system under time-varying multipath channel","authors":"Hongku Kang, W. Hwang, Kiseon Kim, Yeongyoon Choi","doi":"10.1109/WPMC.2002.1088331","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088331","url":null,"abstract":"We evaluate the BER performance of the subchannel power controlled OFDM system considering more practical cases including the limitation in word length in subchannel power control tap-weights and the time-varying multipath channel. According to simulation results, the total required number of bits is 5 for the optimal subchannel power control and the main source of the performance degradation of the subchannel power controlled OFDM system is the time-varying multipath channel.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"468 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128749120","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
Adaptive control of link adaptation for high speed downlink packet access (HSDPA) in W-CDMA W-CDMA高速下行分组接入(HSDPA)链路自适应控制
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088198
M. Nakamura, Y. Awad, S. Vadgama
{"title":"Adaptive control of link adaptation for high speed downlink packet access (HSDPA) in W-CDMA","authors":"M. Nakamura, Y. Awad, S. Vadgama","doi":"10.1109/WPMC.2002.1088198","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088198","url":null,"abstract":"In HSDPA, a set of modulation and coding schemes (MCS) are applied in downlink data transmission. These MCS schemes are adaptively selected in response to channel propagation conditions. During the selection process, adaptive threshold values at the switching points are needed so that the maximum channel capacity is utilized in terms of bits/s/Hz. It has been suggested (see NEC and Telecom Modus, 3GPP TSG RAN WG1, Technical Document R1-01-0589, 2001) to use SIR as well as ACK/NACK information of the HARQ scheme to control threshold values that decide modulation and coding schemes. We further develop this algorithm to provide more stable, and hence higher, throughput results. In cooperation with ACK/NACK information of the HARQ scheme, the threshold values are only updated when the downlink SIR falls close (i.e. /spl plusmn//spl alpha/ dB) to one of the current threshold values of the received MCS level, otherwise the threshold value remains at its current level. Simulation results show that the proposed algorithm provides a significant increase of throughput performance in different radio propagation conditions.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436603","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: 84
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