Abstract
In this paper, we explore the potential of developing an interweave cognitive radio (CR) system based on a hierarchical wide-band two-dimensional spread multi-carrier directedsequenced code division multiple access (MC-DS-CDMA). First, a small CR cell is embedded in a large primary cell such that the spatial separation gives a chance to share the spreading code resources with the primary system. Second, the white, gray and black spreading codes are defined to facilitate the management of the spreading code resources. Also, a new multiple access interference (MAI) coefficient is derived to quantize the amount of intra- and inter-system interference. Third, based on the MAI coefficient, a dynamic spectrum access (DSA) algorithm, including the code assignment/reassignment, transmission power control and call admission control mechanisms, is proposed to efficiently utilize the white and gray spreading codes without damaging the primary system. The simulation results show that compared with the the case of using only the white spreading codes, some extra 53% increase in call admissions and 13% decrease in call droppings can be attained by using the gray spreading codes properly.
| Original language | English |
|---|---|
| Title of host publication | 2010 IEEE 71st Vehicular Technology |
| DOIs | |
| Publication status | Published - 2010 Jul 30 |
| Event | 2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan Duration: 2010 May 16 → 2010 May 19 |
Publication series
| Name | IEEE Vehicular Technology Conference |
|---|---|
| ISSN (Print) | 1550-2252 |
Other
| Other | 2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring |
|---|---|
| Country | Taiwan |
| City | Taipei |
| Period | 10-05-16 → 10-05-19 |
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All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics
Cite this
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An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control. / Chang, Chih Wen; Kuo, Chien Cheng.
2010 IEEE 71st Vehicular Technology. 2010. 5494032 (IEEE Vehicular Technology Conference).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control
AU - Chang, Chih Wen
AU - Kuo, Chien Cheng
PY - 2010/7/30
Y1 - 2010/7/30
N2 - In this paper, we explore the potential of developing an interweave cognitive radio (CR) system based on a hierarchical wide-band two-dimensional spread multi-carrier directedsequenced code division multiple access (MC-DS-CDMA). First, a small CR cell is embedded in a large primary cell such that the spatial separation gives a chance to share the spreading code resources with the primary system. Second, the white, gray and black spreading codes are defined to facilitate the management of the spreading code resources. Also, a new multiple access interference (MAI) coefficient is derived to quantize the amount of intra- and inter-system interference. Third, based on the MAI coefficient, a dynamic spectrum access (DSA) algorithm, including the code assignment/reassignment, transmission power control and call admission control mechanisms, is proposed to efficiently utilize the white and gray spreading codes without damaging the primary system. The simulation results show that compared with the the case of using only the white spreading codes, some extra 53% increase in call admissions and 13% decrease in call droppings can be attained by using the gray spreading codes properly.
AB - In this paper, we explore the potential of developing an interweave cognitive radio (CR) system based on a hierarchical wide-band two-dimensional spread multi-carrier directedsequenced code division multiple access (MC-DS-CDMA). First, a small CR cell is embedded in a large primary cell such that the spatial separation gives a chance to share the spreading code resources with the primary system. Second, the white, gray and black spreading codes are defined to facilitate the management of the spreading code resources. Also, a new multiple access interference (MAI) coefficient is derived to quantize the amount of intra- and inter-system interference. Third, based on the MAI coefficient, a dynamic spectrum access (DSA) algorithm, including the code assignment/reassignment, transmission power control and call admission control mechanisms, is proposed to efficiently utilize the white and gray spreading codes without damaging the primary system. The simulation results show that compared with the the case of using only the white spreading codes, some extra 53% increase in call admissions and 13% decrease in call droppings can be attained by using the gray spreading codes properly.
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UR - http://www.scopus.com/inward/citedby.url?scp=77954944913&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2010.5494032
DO - 10.1109/VETECS.2010.5494032
M3 - Conference contribution
AN - SCOPUS:77954944913
SN - 9781424425198
T3 - IEEE Vehicular Technology Conference
BT - 2010 IEEE 71st Vehicular Technology
ER -