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Proceedings of the 1992 South African Symposium on Communications and Signal Processing最新文献

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Application of digital signal processing to acoustic simulation of auditoria 数字信号处理在礼堂声学模拟中的应用
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274314
G. Kemp, A. Broadhurst
{"title":"Application of digital signal processing to acoustic simulation of auditoria","authors":"G. Kemp, A. Broadhurst","doi":"10.1109/COMSIG.1992.274314","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274314","url":null,"abstract":"This paper describes two methods of describing the acoustics of a room. A statistical approach does not provide a very accurate solution. The geometrical approach provides a better solution by looking at the reflections of the sound rays. This result is presented in the form of an impulse response which is then convolved in real time with an input audio signal so that the sound response of the room can actually be heard.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124074774","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
Neural network recognition of magnetic ink code line using magnetically sensed time variant signal 利用磁感时变信号的磁墨码行神经网络识别
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274274
S. Mostert, J. J. van Rensburg, N. Goosen
{"title":"Neural network recognition of magnetic ink code line using magnetically sensed time variant signal","authors":"S. Mostert, J. J. van Rensburg, N. Goosen","doi":"10.1109/COMSIG.1992.274274","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274274","url":null,"abstract":"This paper provides a solution unique in that the speed varies with the person swiping the check past the head, and the recognition is made without any additional timing information. Techniques applied and researched vary from neural networks to various heuristics based on the properties of the signal derived from the magnetic sense head. The neural network recognition is explored in more detail to find the most optimal solution.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123339361","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
A survey of point pattern matching techniques and a new approach to point pattern recognition 点模式匹配技术综述及点模式识别新方法
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274276
G. Cox, G. de Jager
{"title":"A survey of point pattern matching techniques and a new approach to point pattern recognition","authors":"G. Cox, G. de Jager","doi":"10.1109/COMSIG.1992.274276","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274276","url":null,"abstract":"The new technique developed by the authors is invariant to rotational, scaling and translational transformations, and is optionally reflection invariant. The techniques presented are compared, and specific applications described.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123531410","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: 42
A simulation of synthetic range profile radar 合成距离像雷达的仿真
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274323
M. Inggs, M. van Zyl, A. Knight
{"title":"A simulation of synthetic range profile radar","authors":"M. Inggs, M. van Zyl, A. Knight","doi":"10.1109/COMSIG.1992.274323","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274323","url":null,"abstract":"Synthetic range profiling is a technique where high range resolution is obtained by transmitting a series of pulses at different frequencies, and then using signal processing to form a high resolution image of target reflectivity along the range axis. The technique is basically an extension of pulse compression theory. This paper summarises the theory and describes a simulation system used to determine whether existing radars are suitable for synthetic range profiling. A discussion on the interpretation of range profiles is included.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121578753","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: 17
The design of an N*64k data transmission system based on multiple parallel ISDN U-interfaces 设计了一个基于多个并行ISDN u接口的N*64k数据传输系统
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274283
B. Gildenhuys
{"title":"The design of an N*64k data transmission system based on multiple parallel ISDN U-interfaces","authors":"B. Gildenhuys","doi":"10.1109/COMSIG.1992.274283","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274283","url":null,"abstract":"A brief overview of a new X.21 leased line data transmission system is presented. This system operates in the range 128 to 512 kbit/s and uses 1 to 4 local leads (twisted telephone cable pairs) operating in parallel. Each local lead is driven by a commercially available ISDN U-interface. Particular emphasis is placed on an error monitoring strategy for this system.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121196774","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
The design of a high definition active sonar using FFT beam-forming 基于FFT波束形成的高清主动声呐设计
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274319
L. Everson, A. Sutherland
{"title":"The design of a high definition active sonar using FFT beam-forming","authors":"L. Everson, A. Sutherland","doi":"10.1109/COMSIG.1992.274319","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274319","url":null,"abstract":"The system waits for the returning echoes to determine the shape of the objects in front of it and where they are. It can detect shapes one metre long with a width spanned by 2 degrees , up to a distance of 200 metres. This is done by using a FFT beam-forming technique and a highly specialized array.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115572522","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
A highly efficient real time implementation of Nyquist impulse response and step response filtering 奈奎斯特脉冲响应和阶跃响应滤波的高效实时实现
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274298
G. Meyerowitz, M. L. Marock
{"title":"A highly efficient real time implementation of Nyquist impulse response and step response filtering","authors":"G. Meyerowitz, M. L. Marock","doi":"10.1109/COMSIG.1992.274298","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274298","url":null,"abstract":"A method for implementing real-time impulse response Nyquist pulse shaping, or step-response Nyquist filtering of NRZ data on a microprocessor is proposed. It can also be used for a dedicated hardware implementation.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127284737","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
P/sub epsilon /-derived S/N ratio: a novel ideal error probability performance reference for fading channels P/sub - epsilon /-derived信噪比:一种新的理想衰落信道误差概率性能参考
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274288
J.H. Tonsing, L. Linde
{"title":"P/sub epsilon /-derived S/N ratio: a novel ideal error probability performance reference for fading channels","authors":"J.H. Tonsing, L. Linde","doi":"10.1109/COMSIG.1992.274288","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274288","url":null,"abstract":"Error probability (P/sub epsilon /)-signal to noise ratio (S/N) curves for an ideal modem receiver over an additive white Gaussian noise channel are not useful with time-varying channels, because channels with the same average S/N can have widely differing error probabilities. From consideration of how an actual optimised system would perform over a time-varying channel, a more realistic P/sub epsilon / reference is derived. This leads to a new S/N measure that is a better indicator of channel quality. Application of the reference is demonstrated by evaluation of the performance of a RLS lattice DFE HF modem receiver.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114139457","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
A proposed public key bitstream cipher 一个建议的公钥比特流密码
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274289
C. Meijer, A. Meijer
{"title":"A proposed public key bitstream cipher","authors":"C. Meijer, A. Meijer","doi":"10.1109/COMSIG.1992.274289","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274289","url":null,"abstract":"A bitstream cipher based on the binary expansion of a rational number a/p, where p is a safe prime congruent to 3 modulo 8, is proposed. The numerator a is obtained from public keys, and sender authentication is ensured by a further Diffie-Hellman key exchange. Comparisons are made with the scheme due to ElGamal. (IEEE Trans. vol. IT-31, p.469-73 of 1985).<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"150 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130907571","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
Fast algorithms for the generation of large primes for the RSA cryptosystem RSA密码系统中生成大素数的快速算法
Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI: 10.1109/COMSIG.1992.274291
W. Penzhorn
{"title":"Fast algorithms for the generation of large primes for the RSA cryptosystem","authors":"W. Penzhorn","doi":"10.1109/COMSIG.1992.274291","DOIUrl":"https://doi.org/10.1109/COMSIG.1992.274291","url":null,"abstract":"The generation of large primes is of particular importance in the context of public key cryptography. The Miller-Rabin test is currently one of the most efficient ways of determining whether a given odd integer is composite. Repeated use of this test allows one to certify an integer as 'probable' prime with an arbitrary small probability of error. Based on the observation that prime numbers tend to occur in clusters, or constellations, an algorithm is proposed for the efficient generation of large primes. It is readily implementable on an IBM-PC.<<ETX>>","PeriodicalId":342857,"journal":{"name":"Proceedings of the 1992 South African Symposium on Communications and Signal Processing","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117259433","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
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