TY - JOUR
T1 - Statistical multiplexing-based hybrid FH-OFDMA system for OFDM-based UWB indoor radio access networks
AU - Chong, Jo Woon
AU - Jung, Bang Chul
AU - Sung, Dan Keun
N1 - Funding Information:
Manuscript received August 10, 2005; revised January 9, 2006. This work was supported in part by the Korea Research Foundation. The authors are with the Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea (e-mail: jwchong@cnr.kaist.ac.kr; jw9607@gmail.com; bcjung@cnr.kaist.ac.kr; dksung@ee.kaist.ac.kr). Digital Object Identifier 10.1109/TMTT.2006.872001
PY - 2006/4
Y1 - 2006/4
N2 - We propose a statistical multiplexing-based hybrid frequency-hopping orthogonal frequency-division multiple-access (HFH-OFDMA) system to increase the downlink user capacity of orthogonal frequency-division multiplexing (OFDM)-based ultra-wideband (UWB) indoor radio access networks (RANs). The downlink user capacity is here defined as the maximum allowable number of users served with a given data rate in a piconet. Statistical multiplexing, as noted by Walrand and Varaiya in 2000, is a method in which multiple users with intermittent transmissions efficiently share a link. The adoption of a statistical multiplexing concept enables the HFH-OFDMA system to accommodate many more users than the conventional FH-OFDMA system can. In OFDM-based UWB indoor RANs, the downlink user capacity of the HFH-OFDMA system is limited by either the total number of available subcarriers in a piconet (resource-limited) or the FCC UWB emission limit (power-limited). We analyze the downlink user capacity of the proposed HFH-OFDMA system in both single-piconet and multipiconet environments. In the single-piconet environment, the proposed HFH-OFDMA system which operates in 3.168-3.696-GHz band accommodates 256 users with a data rate of 532.5 kb/s in an OFDM-based UWB indoor RAN, while the proposed HFH-OFDMA system in the multipiconet environment, under the same conditions of the single-piconet environment, accommodates 110 users with a data rate of 532.5 kb/s.
AB - We propose a statistical multiplexing-based hybrid frequency-hopping orthogonal frequency-division multiple-access (HFH-OFDMA) system to increase the downlink user capacity of orthogonal frequency-division multiplexing (OFDM)-based ultra-wideband (UWB) indoor radio access networks (RANs). The downlink user capacity is here defined as the maximum allowable number of users served with a given data rate in a piconet. Statistical multiplexing, as noted by Walrand and Varaiya in 2000, is a method in which multiple users with intermittent transmissions efficiently share a link. The adoption of a statistical multiplexing concept enables the HFH-OFDMA system to accommodate many more users than the conventional FH-OFDMA system can. In OFDM-based UWB indoor RANs, the downlink user capacity of the HFH-OFDMA system is limited by either the total number of available subcarriers in a piconet (resource-limited) or the FCC UWB emission limit (power-limited). We analyze the downlink user capacity of the proposed HFH-OFDMA system in both single-piconet and multipiconet environments. In the single-piconet environment, the proposed HFH-OFDMA system which operates in 3.168-3.696-GHz band accommodates 256 users with a data rate of 532.5 kb/s in an OFDM-based UWB indoor RAN, while the proposed HFH-OFDMA system in the multipiconet environment, under the same conditions of the single-piconet environment, accommodates 110 users with a data rate of 532.5 kb/s.
KW - Downlink
KW - Frequency-hopping orthogonal frequency-division multiple-access (FH-OFDMA)
KW - Indoor
KW - Mill
KW - Multiple access
KW - Orthogonal frequency-division multiple access (OFDMA)
KW - Orthogonal frequency-division multiplexing (OFDM)
KW - Radio access network (RAN)
UR - http://www.scopus.com/inward/record.url?scp=33645910857&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2006.872001
DO - 10.1109/TMTT.2006.872001
M3 - Article
AN - SCOPUS:33645910857
VL - 54
SP - 1793
EP - 1801
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 4
ER -