Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567457
Ho-Chi Hwang, Che-Ho Wei
A minimum mean-squared error (MMSE) linear correlation receiver has been presented to efficiently suppress multiple access interference (MAI) for direct-sequence code-division multiple-access (DS/CDMA) systems in Gaussian channels. The MMSE linear receiver is near-far resistant so as to reduce the requirement of perfect power control. However, additive non-Gaussian impulsive noise bursts in the realistic communication channels. In this paper, we analyze the performance of a linear correlation receiver operating in the presence of MAI and the ambient noise modeled as a symmetric stable process. We also use the Fourier-Bessel series expansion to approximate the exact form of performance analysis. The learning curves of an adaptive linear correlation receiver with different training methods are then examined by computer simulations.
{"title":"Performance of linear detectors for DS/CDMA in impulsive noise channel","authors":"Ho-Chi Hwang, Che-Ho Wei","doi":"10.1109/PIMRC.1996.567457","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567457","url":null,"abstract":"A minimum mean-squared error (MMSE) linear correlation receiver has been presented to efficiently suppress multiple access interference (MAI) for direct-sequence code-division multiple-access (DS/CDMA) systems in Gaussian channels. The MMSE linear receiver is near-far resistant so as to reduce the requirement of perfect power control. However, additive non-Gaussian impulsive noise bursts in the realistic communication channels. In this paper, we analyze the performance of a linear correlation receiver operating in the presence of MAI and the ambient noise modeled as a symmetric stable process. We also use the Fourier-Bessel series expansion to approximate the exact form of performance analysis. The learning curves of an adaptive linear correlation receiver with different training methods are then examined by computer simulations.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117117856","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567446
Ruey-yi Wei, M. Lin
A conventional decision feedback differential detection technique can be regarded as a technique using L previously received signal samples and L-1 previously decided data phases to generate a phase reference for the phase detection operation of a currently received MPSK signal sample. With this observation, we propose a differential detection technique which uses a new way to generate the phase reference. In the proposed technique, the phase reference called weighted phase reference is the weighted sum of primitive phase references derived from previously received signal samples. The weighted phase reference can be generated using a simple recursive form. The proposed detection technique can be easily implemented and has satisfactory error performance.
{"title":"Decision feedback differential detection using weighted phase references","authors":"Ruey-yi Wei, M. Lin","doi":"10.1109/PIMRC.1996.567446","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567446","url":null,"abstract":"A conventional decision feedback differential detection technique can be regarded as a technique using L previously received signal samples and L-1 previously decided data phases to generate a phase reference for the phase detection operation of a currently received MPSK signal sample. With this observation, we propose a differential detection technique which uses a new way to generate the phase reference. In the proposed technique, the phase reference called weighted phase reference is the weighted sum of primitive phase references derived from previously received signal samples. The weighted phase reference can be generated using a simple recursive form. The proposed detection technique can be easily implemented and has satisfactory error performance.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127435309","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567444
J. M. Torrance, L. Hanzo
A novel, uneven protection phase shift keying technique is proposed for the encoding of the required modulation scheme in an adaptive modem arrangement, which exhibits an improved performance in comparison to previously proposed schemes. The performance is derived numerically and a system dependent optimisation is presented. A benefit of 5 dB is achieved in a Rayleigh channel.
{"title":"Adaptive modulation in a slow Rayleigh fading channel","authors":"J. M. Torrance, L. Hanzo","doi":"10.1109/PIMRC.1996.567444","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567444","url":null,"abstract":"A novel, uneven protection phase shift keying technique is proposed for the encoding of the required modulation scheme in an adaptive modem arrangement, which exhibits an improved performance in comparison to previously proposed schemes. The performance is derived numerically and a system dependent optimisation is presented. A benefit of 5 dB is achieved in a Rayleigh channel.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125555344","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567536
P. Cherriman, L. Hanzo
An H.263-based video transceiver is contrived, which maintains a near-constant bitrate and due to the proposed packetisation and packet dropping regime it provides near-unimpaired video quality for frame error rates up to 5%. The target frame error rate is maintained by invoking a novel power-control technique.
{"title":"Power-controlled H.263-based wireless videophone performance in interference-limited scenarios","authors":"P. Cherriman, L. Hanzo","doi":"10.1109/PIMRC.1996.567536","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567536","url":null,"abstract":"An H.263-based video transceiver is contrived, which maintains a near-constant bitrate and due to the proposed packetisation and packet dropping regime it provides near-unimpaired video quality for frame error rates up to 5%. The target frame error rate is maintained by invoking a novel power-control technique.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122421643","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567451
D. Moelker, A. Shah, Y. Bar-Ness
This paper presents the generalised maximum signal-to-interference-plus-noise ratio (MSINR) array processor, which is the extension of MSINR from the single to the multiple desired-signal case. The problem of optimal multiple desired signal processing is of particular importance in a multipath fading environment. Therefore, the performance of the MSINR processor is evaluated for personal communication systems (PCS) in a Rayleigh fading channel with interference. Strong interference is expected in the PCS channel, due to the overlay in the spectrum allocated to PCS. It is shown that the generalised MSINR processor outperforms other methods the minimum variance distortionless response (MVDR) and the minimum mean square error (MMSE) interference cancellers, yielding the best bit error rate (BER).
{"title":"The generalised maximum SINR array processor for personal communication systems in a multipath environment","authors":"D. Moelker, A. Shah, Y. Bar-Ness","doi":"10.1109/PIMRC.1996.567451","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567451","url":null,"abstract":"This paper presents the generalised maximum signal-to-interference-plus-noise ratio (MSINR) array processor, which is the extension of MSINR from the single to the multiple desired-signal case. The problem of optimal multiple desired signal processing is of particular importance in a multipath fading environment. Therefore, the performance of the MSINR processor is evaluated for personal communication systems (PCS) in a Rayleigh fading channel with interference. Strong interference is expected in the PCS channel, due to the overlay in the spectrum allocated to PCS. It is shown that the generalised MSINR processor outperforms other methods the minimum variance distortionless response (MVDR) and the minimum mean square error (MMSE) interference cancellers, yielding the best bit error rate (BER).","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122544952","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567470
Rong-Fong Chang, Shiunn-Wen Wang
We propose and analyze a quality-based admission control policy for the integration of voice and data in a CDMA system. The data users are assigned a higher transmission power level over voice users to achieve a lower bit error rate. The admission policy determines the acceptance of a call request based on its specified QoS and the network resources. The system ensures that an accepted call can enjoy its specified QoS without degrading the quality of existing calls. A Markov model is developed to analyze the blocking probability and outage probability. The Erlang capacity of the system can be evaluated.
{"title":"QOS-based call admission control for integrated voice and data in CDMA systems","authors":"Rong-Fong Chang, Shiunn-Wen Wang","doi":"10.1109/PIMRC.1996.567470","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567470","url":null,"abstract":"We propose and analyze a quality-based admission control policy for the integration of voice and data in a CDMA system. The data users are assigned a higher transmission power level over voice users to achieve a lower bit error rate. The admission policy determines the acceptance of a call request based on its specified QoS and the network resources. The system ensures that an accepted call can enjoy its specified QoS without degrading the quality of existing calls. A Markov model is developed to analyze the blocking probability and outage probability. The Erlang capacity of the system can be evaluated.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114426781","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.568425
Shin-Iuan Wang, Chia-Chi Huang
An unified vehicle supervising and traffic information system architecture is proposed. This new architecture integrates different system functions such as digital mobile radio communication, vehicle monitoring, traffic information collection, dynamic route guidance, and automatic toll collection into a single system architecture. A vehicle communication and ranging system is the radio interface of the architecture. Packetized data transmission through this radio interface can be used to measure the received signal delay by pulse ranging. An uplink message from a vehicle containing vehicle speed information and the measured delay are both sent to a traffic control and information center for vehicle monitoring. The center estimates the vehicle location, and calculates the average traveling time and average congestion level for each road link accordingly. Vehicle monitoring information and the estimated traffic condition can be offered to either the public or dispatching centers. A toll collection center will be able to automatically charge a vehicle through the monitoring process. Furthermore, a vehicle will be able to access the traffic control and information center to obtain its own dynamic route guidance information, and each vehicle can be guided in such a way to optimize the overall road traffic. Finally, we suggest two methods which use the infrastructure of existing digital cellular systems (GSM and IS-95) to implement the proposed system architecture.
{"title":"An unified vehicle supervising and traffic information system","authors":"Shin-Iuan Wang, Chia-Chi Huang","doi":"10.1109/PIMRC.1996.568425","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.568425","url":null,"abstract":"An unified vehicle supervising and traffic information system architecture is proposed. This new architecture integrates different system functions such as digital mobile radio communication, vehicle monitoring, traffic information collection, dynamic route guidance, and automatic toll collection into a single system architecture. A vehicle communication and ranging system is the radio interface of the architecture. Packetized data transmission through this radio interface can be used to measure the received signal delay by pulse ranging. An uplink message from a vehicle containing vehicle speed information and the measured delay are both sent to a traffic control and information center for vehicle monitoring. The center estimates the vehicle location, and calculates the average traveling time and average congestion level for each road link accordingly. Vehicle monitoring information and the estimated traffic condition can be offered to either the public or dispatching centers. A toll collection center will be able to automatically charge a vehicle through the monitoring process. Furthermore, a vehicle will be able to access the traffic control and information center to obtain its own dynamic route guidance information, and each vehicle can be guided in such a way to optimize the overall road traffic. Finally, we suggest two methods which use the infrastructure of existing digital cellular systems (GSM and IS-95) to implement the proposed system architecture.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114467601","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567404
P. Y. Jou, Y. Ko, H. Cheong, C. Kang
We present a new approach for designing the continuous phase frequency shift keying (CPFSK) system which is a nonlinear mapping of the M-ary symbols into the N-ary CPFSK. In this approach we can design a M-ary symbol nonlinear CPFSK (NCPFSK) system of simple structure. The proposed M-ary NCPFSK is a modification of multi-h CPM (MHCPM) scheme. The proposed modulation improves the performance relatively over the conventional modulation schemes.
提出了一种设计连续相移频键控系统的新方法，该方法是将m进制符号非线性映射到n进制的CPFSK上。用这种方法可以设计出结构简单的m符号非线性CPFSK (NCPFSK)系统。提出的m - mary NCPFSK是对多h CPM (MHCPM)方案的改进。与传统的调制方案相比，所提出的调制方案的性能有所提高。
{"title":"Nonlinear-symbol continuous phase frequency shift keying","authors":"P. Y. Jou, Y. Ko, H. Cheong, C. Kang","doi":"10.1109/PIMRC.1996.567404","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567404","url":null,"abstract":"We present a new approach for designing the continuous phase frequency shift keying (CPFSK) system which is a nonlinear mapping of the M-ary symbols into the N-ary CPFSK. In this approach we can design a M-ary symbol nonlinear CPFSK (NCPFSK) system of simple structure. The proposed M-ary NCPFSK is a modification of multi-h CPM (MHCPM) scheme. The proposed modulation improves the performance relatively over the conventional modulation schemes.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128795190","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.567534
K. Heiska, Arto Kangas
A new ray-tracing propagation model for network planning purposes is investigated. The accuracy of the model is verified by measurements in the center of Helsinki in Finland covering different transmitter and receiver locations as well as different propagation situations. The model is designed for situations where the transmitting and receiving antennas are below the rooftops and it uses a vector formatted building database as the input. Multiple reflections from the building walls and single and double diffractions from building wedges are computed. Multiple reflections followed by one or two diffractions can also be taken into account. New geometrical algorithms have been employed in the search of multiple reflected and diffracted rays to decrease the computation time applicable for network planning applications. Computation times of the coverage calculation are shown for different map data and for different propagation contributions.
{"title":"Microcell propagation model for network planning","authors":"K. Heiska, Arto Kangas","doi":"10.1109/PIMRC.1996.567534","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.567534","url":null,"abstract":"A new ray-tracing propagation model for network planning purposes is investigated. The accuracy of the model is verified by measurements in the center of Helsinki in Finland covering different transmitter and receiver locations as well as different propagation situations. The model is designed for situations where the transmitting and receiving antennas are below the rooftops and it uses a vector formatted building database as the input. Multiple reflections from the building walls and single and double diffractions from building wedges are computed. Multiple reflections followed by one or two diffractions can also be taken into account. New geometrical algorithms have been employed in the search of multiple reflected and diffracted rays to decrease the computation time applicable for network planning applications. Computation times of the coverage calculation are shown for different map data and for different propagation contributions.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124599894","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}
Pub Date : 1996-10-15DOI: 10.1109/PIMRC.1996.568441
R. A. Stanley
In this analysis, a model for total wireless system costs is developed, using radiopart coverage and system topology as the independent variables. A system is examined to determine the interrelationships of the elements of cost. Finally, a model of total system costs is presented that allows a system designer to select key system components to achieve minimal overall cost.
{"title":"A methodology for evaluating and optimizing wireless system infrastructure costs","authors":"R. A. Stanley","doi":"10.1109/PIMRC.1996.568441","DOIUrl":"https://doi.org/10.1109/PIMRC.1996.568441","url":null,"abstract":"In this analysis, a model for total wireless system costs is developed, using radiopart coverage and system topology as the independent variables. A system is examined to determine the interrelationships of the elements of cost. Finally, a model of total system costs is presented that allows a system designer to select key system components to achieve minimal overall cost.","PeriodicalId":206655,"journal":{"name":"Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124639298","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}
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