naa a22 4500 51079713X CHVBK 20180411083340.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11277-013-1271-0 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1271-0 Energy Efficient Scalable Sub-band based Ultra-Wideband System [Elektronische Daten] [Jinesh Nair, Debarati Sen, Sujit Jos] In this paper, a scalable sub-band ultra-wideband (S-SUWB) system is proposed. The technique provides scope for using the ultra-wideband bandwidth efficiently by exploiting the available link margin for short range communications with medium data rates. The bandwidth of 500MHz or more is divided into a fixed number of sub-bands. The data transmission scheme over multiple sub-bands can be designed to achieve higher data rate or higher reliability while providing multiuser support in both uplink and downlink communications. The proposed system provides enhanced scalability by the efficient utilization of the code-frequency dimensions. Sub-banding in conjunction with orthogonal spreading code facilitates transmission of plurality of data streams within a sub-band and along sub-bands for each user. Very importantly, the proposed system incorporates methods at the receiver facilitating low power receiver designs. Primarily, S-SUWB enables reduced sampling rate receiver designs significantly reducing the power consumption. Also, the spreading code based sub-band selection method obviates the need for individual down-conversion and filtering of the sub-bands thus reducing the complexity. Moreover, an interference rejection filtering (IRF) method incorporated into the despreading process is proposed to improve the performance without significantly increasing the receiver complexity. The simulation results in terms of the bit error rate performance of the scalable multiuser S-SUWB transceiver for the IEEE 802.15.4a channel models are presented demonstrating the usefulness of the proposed scheme. Performance improvements with the use of the IRF and also multi-user results are presented. The results indicate the desirable performance is obtained using the energy efficient techniques for low and medium delay spread channels even without the use of any equalization method. Springer Science+Business Media New York, 2013 Multiuser nationallicence Scalable SUWB nationallicence Sub-banding nationallicence Ultra wide band nationallicence Nair Jinesh SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut Sen Debarati SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut Jos Sujit SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut Wireless Personal Communications Springer US; http://www.springer-ny.com 73/3(2013-12-01), 1143-1167 0929-6212 73:3<1143 2013 73 11277 https://doi.org/10.1007/s11277-013-1271-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1271-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nair Jinesh SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut NATIONALLICENCE 700 1- Sen Debarati SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut NATIONALLICENCE 700 1- Jos Sujit SAIT India Lab, Samsung Electronics India Pvt. Ltd, 560093, Bangalore, India aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 73/3(2013-12-01), 1143-1167 0929-6212 73:3<1143 2013 73 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer