2013 National Conference on Communications (NCC)最新文献

Printed Egg Curved Monopole Antenna for ultrawideband applications 用于超宽带应用的印刷蛋形弯曲单极天线

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6487906

S. Verma, Preetam Kumar

引用次数: 6

Adaptable concurrent dual-band symmetrical stubbed T-junction power splitter 自适应并发双频对称存根t结功率分配器

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6487974

Vivek Sharma, N. Pathak

引用次数: 3

Performance analysis of Alamouti transmit diversity with a sub-optimum joint transmit-receive antenna selection scheme 次优联合收发天线选择方案下Alamouti发射分集性能分析

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6487964

J. M. Chakravarti, Y. Trivedi

{"title":"Performance analysis of Alamouti transmit diversity with a sub-optimum joint transmit-receive antenna selection scheme","authors":"J. M. Chakravarti, Y. Trivedi","doi":"10.1109/NCC.2013.6487964","DOIUrl":"https://doi.org/10.1109/NCC.2013.6487964","url":null,"abstract":"We consider a sub-optimum joint transmitreceive antenna selection (JTRAS) scheme in multiple input multiple output (MIMO) systems equipped with N transmit and two receive antennas. At the transmitter, we keep one antenna as fixed and select the best among the remaining N − 1 antennas. After selecting two transmit antennas for each of the receive antennas, we select the receive antenna for which the signal to noise ratio (SNR) is maximum. We assume spatially independent flat fading channels with perfect channel state information (CSI) at receiver and an ideal feedback link. We use Alamouti transmit diversity and derive the exact closed-form expression for the pdf of received SNR, using which we obtain bit error rate (BER) for BPSK constellation. We have presented simulation results and compared them with the derived analytical expressions. We have discussed some special cases of the considered antenna selection scheme. We have compared performance of the considered scheme with the other available schemes in terms of number of feedback bits and BER. We conclude that the considered JTRAS scheme reduces number of feedback bits.","PeriodicalId":202526,"journal":{"name":"2013 National Conference on Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123117194","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

Principal architectural changes in polar transmitter in DRP design for WLAN 无线局域网DRP设计中极性发射机的主要结构变化

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6488006

S. Gunturi, J. Tangudu, S. Ramakrishnan, Jayawardan Janardhanan, D. Sahu, S. Mukherjee

{"title":"Principal architectural changes in polar transmitter in DRP design for WLAN","authors":"S. Gunturi, J. Tangudu, S. Ramakrishnan, Jayawardan Janardhanan, D. Sahu, S. Mukherjee","doi":"10.1109/NCC.2013.6488006","DOIUrl":"https://doi.org/10.1109/NCC.2013.6488006","url":null,"abstract":"In Digital Radio Processor(DRP) an All-digital Phase Locked Loop(ADPLL) forms the core of the architecture with a digitally controlled oscillator(DCO) being the counterpart of Voltage Controlled Oscillator (VCO) in a conventional PLL design. In addition to this, the RF modulation is also performed digitally by feeding Frequency Control Word(FCW) into the ADPLL. This implies that the DCO should be able to support the frequency range requirements for the modulation technique. DCO modulation range for GSM and Bluetooth systems is few hundreds of KHz. However, in order to support WLAN in both 2.4 GHz (ISM band) and 5–5.9 GHz(UNII) bands the DCO needs to have 1.2 GHz modulation range at 12 GHz frequency. Such a DCO becomes extremely sensitive to supply voltage fluctuations. We propose an algorithm which reduces the modulation range requirement of the DCO and hence its sensitivity to supply voltage. In DRP, the modulated clock output of the ADPLL is used as the sampling clock for the digital logic. For GSM and Bluetooth systems the drift introduced in phase samples by using the modulated clock is negligible. However, for WLAN, merely using the modulated clock for sampling is disastrous as it will introduce intolerable drift in the phase samples when compared to phase samples generated by using a constant uniform clock. We propose a predistortion scheme for frequency control words(FCW) to correct this effect of modulated clock.","PeriodicalId":202526,"journal":{"name":"2013 National Conference on Communications (NCC)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126183065","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

Power-optimal scheduling for a Green Base station with delay constraints 具有延迟约束的绿色基站功率最优调度

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6488018

A. Lalitha, S.A. Mondal, Satya Kumar V, V. Sharma

引用次数: 16

A rule relation calculus for verification and validation of firewalls 用于防火墙验证和验证的规则关系演算

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6488042

Shobhanjana Kalita, S. Hazarika

引用次数: 2

Enhancement of inscription images 碑文图像增强

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6488017

I. Sreedevi, Rishi Pandey, N. Jayanthi, Geetanjali Bhola, S. Chaudhury

引用次数: 9

Unified pitch markers generation method for pitch and duration modification 统一的音高标记生成方法，用于修改音高和持续时间

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6487988

S R M Prasanna, D. Govind

引用次数: 3

Bridging the digital gap in rural India VIVEKDISHA: A novel experience 弥合印度农村的数字鸿沟VIVEKDISHA:一种新颖的体验

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6488049

P. Goswami, R. Mahapatra, Sw. Divyasukananda

{"title":"Bridging the digital gap in rural India VIVEKDISHA: A novel experience","authors":"P. Goswami, R. Mahapatra, Sw. Divyasukananda","doi":"10.1109/NCC.2013.6488049","DOIUrl":"https://doi.org/10.1109/NCC.2013.6488049","url":null,"abstract":"VIVEKDISHA is an ICT-based Network of Ramakrishna Mission Vivekananda University (RKMVU). The objective of this network is to showcase several methodologies for the all-round development of a community by bringing technology and knowledge directly to the door steps of the people. To the best of our knowledge, the introduction of low-cost multimedia-based online classes at rural schools in India has been pioneered by this network. The rural virtual class rooms and tele-medicine centres used in this network are more economical than traditional hardware-based video conferencing solutions and the same realistic approach may be followed to serve rural education and health sectors. It has been found that reliable 512 kbps broadband internet connectivity is the most essential component of this kind of network. In reality, availability of reliable broadband Internet connectivity in rural India is a challenge as all telecom operators are not motivated to bridge the digital gap through broadband Internet penetration in rural India. This paper shares the experiences of Tele-education at schools and Tele-medicine at geographically challenged (Sundarban - delta region of West Bengal) areas. Since the age of the Vedas, education and health have been instrumental in the development of society; hence the proposed Tele-education and Tele-medicine methodology will pave one of the ways to bridge the digital gap in rural India.","PeriodicalId":202526,"journal":{"name":"2013 National Conference on Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114265320","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

Co-ordinate interleaved non-orthogonal amplify and forward relaying protocol 坐标交错非正交放大和前向中继协议

2013 National Conference on Communications (NCC) Pub Date : 2013-03-28 DOI: 10.1109/NCC.2013.6487903

V. Sreekanth, K. V. Srinivas, S. Bhashyam

引用次数: 1