{"title":"A fully integrated low cost packaged CMOS low noise amplifier for the UWB radio","authors":"A. Medi, W. Namgoong","doi":"10.1109/RWS.2006.1615108","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615108","url":null,"abstract":"A fully integrated low noise amplifier (LNA) has been designed in 0.25 /spl mu/m CMOS technology for the ultra-wideband (UWB) radio. The LNA operates in the 3.1 - 4.8 GHz band. Within this band, the noise figure is less than 4.9 dB, |S/sub 11/| < -10.5 dB, |S/sub 21/| > 8.5 dB, and IIP3 > -2.2 dBm. The LNA core block dissipates 10 mA current from a 2-volt power supply. The designed LNA is packaged in a regular LQFP package and shown not to be too sensitive to the bonding wire length.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130399121","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":"Broadcast performance improvement using traffic isolation in wireless ad hoc networks","authors":"R. Purtoosi, H. Taheri, A. Mohammadi, F. Forrozan","doi":"10.1109/RWS.2006.1615174","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615174","url":null,"abstract":"In this paper we propose a traffic isolation method to be used in cluster-based broadcasting algorithms. For internal broadcast traffic, cluster-heads and gateways are responsible for re-broadcasting but for external ones, border nodes may perform the forwarding function as well. This simplifies the gateway selection method through the local selection of gateway nodes by its cluster head. This reduces the control message overhead of the gateway selection method. Simulations have been conducted to study the broadcast performance parameters in light and dense networks. Results show the improvement in comparison to other broadcasting methods","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127680733","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":"Evolving wireless technology & multi mode requirements for client platforms","authors":"D. Schmidt, A. Gupta","doi":"10.1109/RWS.2006.1615079","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615079","url":null,"abstract":"This talk will focus on new technologies for multi mode client devices, and how these technologies can extend the service providers revenue model. The goal is keeping cost of delivery of services low while providing new applications for the emerging breed of client platforms. Wireless technology is becoming pervasive, with several new standards being added to the handheld cellular paradigm. While single-protocol solutions still dominate, portable, multi-mode wireless is already here. The market is primed for mass introduction of multi-mode wireless. However, to reach this point multi-mode platforms will likely need costs and performance exhibited by single standard solutions. Many ingredients will need to be perfected to achieve these goals and one primary realization will be that CMOS will no longer equate with digital: RF/analog will be just as ubiquitous in CMOS. Another consequence of the need to bring together a large number of disparate technologies is that it may limit the number of players. The technical challenges are increasing barriers to entry, and companies with the largest portfolios of technologies will likely benefit","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127942739","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":"Analysis of LED-allocation algorithm for high-speed parallel wireless optical communication system","authors":"S. Miyauchi, T. Komine, S. Haruyama, M. Nakagawa","doi":"10.1109/RWS.2006.1615127","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615127","url":null,"abstract":"We analyze LED-allocation algorithms for high-speed parallel wireless optical communication system that we have developed. It enables up to gigabit-class communication using two-dimensional transmitter composed of LED array, and two-dimensional receiver composed of lens and image sensor. However, there are some interference problems when the allocation of packets to LEDs is not good. Considering these problems, we propose new LED-allocation algorithms to improve the affection of interference. In this paper, we analyze the link of parallel wireless optical communication system and show the effectiveness of our proposed algorithms by simulation.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128977613","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":"A new TH/DS-CDMA scheme for UWB communication systems and its performance analysis","authors":"M. Shayesteh, M. Nasiri-Kenari","doi":"10.1109/RWS.2006.1615116","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615116","url":null,"abstract":"We propose a new multiple access technique for ultra wide-band (UWB) systems based on time-hopping (TH) and direct sequence (DS) spread spectrum techniques. In this method, the duration of each bit is divided into N/sub s/ frames each one consisting of N/sub h/ chips. The outputs of a super-orthogonal encoder and a PN sequence specify the frame number, in which the data is transmitted in DS spread-spectrum form using the second PN sequence. We consider hard decision with threshold and soft decision before Viterbi decoding at the receiver. We evaluate the performance of the proposed method and compare it with the conventional DS-CDMA system. The results show that the proposed method has the best performance while it has the same bandwidth as the conventional DS-CDMA system.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127558027","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":"An automated system interoperability test bed for WPA and WPA2","authors":"S. Bohn, S. Grob, R. Nubgen, P. Schwann","doi":"10.1109/RWS.2006.1615232","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615232","url":null,"abstract":"The discovery of several attacks on WEP during the past few years has rendered the first WLAN security standard useless. Thus, new mechanisms had to be defined to protect current and future wireless infrastructures. However, some parts of the new standards WPA and WPA2/IEEE802.11i respectively require changes in the used hardware. To ensure interoperability between different vendor's products the Wi-Fi alliance provides a certificate that can be obtained by passing several fixed tests. Unfortunately, there exists no standard solution so far to get your products ready for the certification process. Each vendor has to do his homework by hand. To overcome this manual and error-prone process we have developed a test environment for conducting automated system interoperability tests. In this paper we outline the Wi-Fi certification process and categorize necessary test requirements to be fulfilled. We further discuss our solution, i.e., the setup of our test environment and selected implementation details of the associated control software.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121199991","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}
Yo‐Sheng Lin, Hsiao-Bin Liang, Tao Wang, Shey-Shi Lu
{"title":"An analysis of perfect-magnetic-coupling ultra-low-loss micromachined SMIS RF transformers for RFIC applications","authors":"Yo‐Sheng Lin, Hsiao-Bin Liang, Tao Wang, Shey-Shi Lu","doi":"10.1109/RWS.2006.1615093","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615093","url":null,"abstract":"Selective removal of the silicon underneath a set of single-turn multi-layer interlaced stacked (SMIS) RF transformers with nearly perfect magnetic-coupling factor (k/sub IM/ /spl sim/ 1) and high resistive-coupling factor (k/sub Re/) is demonstrated. This process is based on the inductively-coupled-plasma (ICP) deep trench technology. A 102% (from 4.963 to 10.03) and a 23.4% (from 2.236 to 2.76) increase in Q-factor, a 11.8 % (from 0.756 to 0.845) and a 4.4 % (from 0.881 to 0.92) increase in G/sub Amax/, and a 0.484 dB (from 1.215 dB to 0.731 dB) and a 0.188 dB (from 0.549 dB to 0.361 dB) decrease in NF/sub min/ were achieved at 5.2 and 8 GHz, respectively, for a SMIS transformer with an overall dimension of 170/spl times/240 /spl mu/m/sup 2/ after the backside ICP dry etching. The G/sub Amax/ of 0.845 and 0.92 are both state-of-the-art results among all reported on-chip transformers. Furthermore, the reasons why the SMIS transformer exhibits better performances than the traditional bifilar and stacked transformer are explained.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114269980","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":"Broadband circularly polarized annular ring array antenna for wireless communications","authors":"S. Shetty, A. Daryoush","doi":"10.1109/RWS.2006.1615183","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615183","url":null,"abstract":"Future mobile communication systems are based on digitally beam formed multibeam phased array systems. The multibeams are generated and scanned using electronic scanning. The broadband circularly polarized antennas are important element in this communication structure. This paper presents implementation and experimental evaluation of a 2times2 array antenna using annular ring patch antenna at S-band. The achieved directivity gain is 9 dBi over frequency of 2.1-2.7 GHz. The input 2:1 VSWR is measured over frequency range of 1 GHz","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"19 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123033934","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":"A system-on-package integration of 60 GHz ASK transmitter","authors":"D. Jung, W.I. Chang, C. Park","doi":"10.1109/RWS.2006.1615117","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615117","url":null,"abstract":"This paper presents a simple ASK system-on-package transmitter (SoP-Tx) integrating MMICs on a low temperature co-fired ceramic (LTCC) multilayer circuit for high data rate WLAN/WPAN applications. The adopted modulation scheme is amplitude shift keying (ASK) for simple configuration with high data rate. The active circuit is the compact coplanar ASK modulation block including a 60 GHz-band fundamental mode oscillator, a buffer, and a switch. The passive circuits comprise of a dielectric waveguide filter (DWGF) and a microstrip patch antenna. LTCC technologies are used to implement the compact RF SoP-Tx module with high performance.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132348","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":"Symbol synchronization and data detection in DS/CDMA systems affected by multiple narrowband interferers","authors":"S. Buzzi, M. Lops","doi":"10.1109/RWS.2006.1615172","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615172","url":null,"abstract":"We consider an asynchronous direct-sequence code division multiple access (DS/CDMA) system operating in a frequency band partially occupied by several narrowband communication signals. The problem of symbol timing recovery and reliable data detection for the CDMA users is considered in this paper. First of all, we show that conventional timing and data detection, based on the matched filter, does incur a severe performance loss in the presence of several narrowband interferers and CDMA users. We thus propose two digital reception algorithm which are resistant to narrowband interferers. The first algorithm performs interference cancellation; it may be used in a centralized receiver wherein the narrowband signals have been acquired and detected. The second algorithm operates on a frequency-domain representation of the data. A new symbol synchronization algorithm is also given; this procedure operates on the samples of the received signal (i.e., synchronization is extracted processing the discrete-time data rather than the continuous-time observables). Results show that the proposed algorithms achieve performance levels much larger than those of the conventional algorithms based on matched filtering.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115784518","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}