T. Ait-Idir, H. Chafnaji, H. Yanikomeroglu, S. Saoudi
{"title":"Turbo packet combining for broadband MIMO relay communication","authors":"T. Ait-Idir, H. Chafnaji, H. Yanikomeroglu, S. Saoudi","doi":"10.1109/MMS.2009.5409772","DOIUrl":"https://doi.org/10.1109/MMS.2009.5409772","url":null,"abstract":"In this paper, we provide a survey of cooperative automatic repeat request (ARQ) protocols for multi-relay systems operating over multiple-input-multiple-output (MIMO) broadband channels. We study three main operating modes: amplify-and-forward (AF), decode-and-forward (DF), and positive/negative acknowledgment (ACK/NACK)-aided DF. We describe efficient minimum mean square error (MMSE) frequency domain equalization (FDE) iterative turbo packet combining techniques for cooperative ARQ, and show that they outperform conventional log-likelihood ratio (LLR)-based turbo combining.","PeriodicalId":300247,"journal":{"name":"2009 Mediterrannean Microwave Symposium (MMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132635157","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}
{"title":"On the ranging performance in an underground mine using ultra-wideband fast acquisition system","authors":"Y. Salih-Alj, C. Despins, S. Affes","doi":"10.1109/mms.2009.5409773","DOIUrl":"https://doi.org/10.1109/mms.2009.5409773","url":null,"abstract":"Ultra-wideband (UWB) communication systems provide very high data rates by transmitting extremely short duration pulses. The impulse waveform is one of the key factors that influence the performance of these systems. While fulfilling the FCC spectral emission requirements, the pulse shape must offer high detection capabilities with suitable levels of accuracy. In this paper, various pulse shapes are considered within a computationally-efficient fast acquisition system under different scenarios of interference and Gaussian noise in extensive Monte-Carlo simulations. The results show the 4th order Gaussian derivative as the most suitable pulse shape for this new UWB fast acquisition system suggested for ranging in a peculiar confined environment, which offers very acceptable positioning error range at high levels of noise and interference, while also yielding greatly reduced complexity and acquisition time.","PeriodicalId":300247,"journal":{"name":"2009 Mediterrannean Microwave Symposium (MMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125706736","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}
M. Meloui, I. Akhchaf, H. Setti, M. Charif, M. Essaaidi
{"title":"A flat gain low noise amplifier for 1.8 to 4GHz wide band wireless receivers","authors":"M. Meloui, I. Akhchaf, H. Setti, M. Charif, M. Essaaidi","doi":"10.1109/mms.2009.5409765","DOIUrl":"https://doi.org/10.1109/mms.2009.5409765","url":null,"abstract":"This paper presents a design technique for a low-noise amplifier for the 1.8–4 GHz ultra wideband (UWB) wireless receivers. The LNA uses a circuit topology consisting of one gain stage with series inductor feedback using ATF technology and it is operated at 1 V. The noise figure of this LNA varies from 3 to 1.5 dB, and its gain is very flat 10 dB throughout frequency band spanning from 1.8 to 4 GHz. These results were obtained using Agilent ADS commercial simulator and confirmed with Ansoft designer utilizing ATF-10136 amplifier technology.","PeriodicalId":300247,"journal":{"name":"2009 Mediterrannean Microwave Symposium (MMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393820","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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