摘要
In addition to some design flexibilities, the low interference property of code division multiple access (CDMA) makes multi-carrier direct sequence CDMA (MC-DS-CDMA) suitable for possible unlicensed transmissions in the licensed bands. Introducing the concept of time division multiple access (TDMA) into MCDS-CDMA may further create a new dimension dealing with the interference problem. In this paper, we proposed a time slicing code assignment for the two-dimensional (2D) spread MC-DSCDMA. The time slicing technique distributes interference equally over transmission time intervals (TTIs) by assigning users different frequency-domain spreading code groups and transmitting in their corresponding TTIs. Combing with the previous interference avoidance code assignment and power control mechanism for the 2D-spread MC-DS-CDMA, the proposed time slicing scheme is proved to be capable of eliminating interference more efficiently. In terms of the call admission rate, the improvement can be as large as 10% in one of the considered cases. A good operating point of time slicing can also maintain a high throughput, while achieving lower call dropping rate and lower power consumption. The results of this paper can provide some important and interesting hints for the system designers.
| 原文 | English |
|---|---|
| 主出版物標題 | VTC Spring 2009 - IEEE 69th Vehicular Technology Conference |
| DOIs | |
| 出版狀態 | Published - 2009 |
| 事件 | VTC Spring 2009 - IEEE 69th Vehicular Technology Conference - Barcelona, Spain 持續時間: 2009 四月 26 → 2009 四月 29 |
Other
| Other | VTC Spring 2009 - IEEE 69th Vehicular Technology Conference |
|---|---|
| 國家 | Spain |
| 城市 | Barcelona |
| 期間 | 09-04-26 → 09-04-29 |
指紋
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics
引用此文
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A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems. / Chang, Chih-Wen; Kuo, Chien Cheng.
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009. 5073304.研究成果: Conference contribution
TY - GEN
T1 - A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems
AU - Chang, Chih-Wen
AU - Kuo, Chien Cheng
PY - 2009
Y1 - 2009
N2 - In addition to some design flexibilities, the low interference property of code division multiple access (CDMA) makes multi-carrier direct sequence CDMA (MC-DS-CDMA) suitable for possible unlicensed transmissions in the licensed bands. Introducing the concept of time division multiple access (TDMA) into MCDS-CDMA may further create a new dimension dealing with the interference problem. In this paper, we proposed a time slicing code assignment for the two-dimensional (2D) spread MC-DSCDMA. The time slicing technique distributes interference equally over transmission time intervals (TTIs) by assigning users different frequency-domain spreading code groups and transmitting in their corresponding TTIs. Combing with the previous interference avoidance code assignment and power control mechanism for the 2D-spread MC-DS-CDMA, the proposed time slicing scheme is proved to be capable of eliminating interference more efficiently. In terms of the call admission rate, the improvement can be as large as 10% in one of the considered cases. A good operating point of time slicing can also maintain a high throughput, while achieving lower call dropping rate and lower power consumption. The results of this paper can provide some important and interesting hints for the system designers.
AB - In addition to some design flexibilities, the low interference property of code division multiple access (CDMA) makes multi-carrier direct sequence CDMA (MC-DS-CDMA) suitable for possible unlicensed transmissions in the licensed bands. Introducing the concept of time division multiple access (TDMA) into MCDS-CDMA may further create a new dimension dealing with the interference problem. In this paper, we proposed a time slicing code assignment for the two-dimensional (2D) spread MC-DSCDMA. The time slicing technique distributes interference equally over transmission time intervals (TTIs) by assigning users different frequency-domain spreading code groups and transmitting in their corresponding TTIs. Combing with the previous interference avoidance code assignment and power control mechanism for the 2D-spread MC-DS-CDMA, the proposed time slicing scheme is proved to be capable of eliminating interference more efficiently. In terms of the call admission rate, the improvement can be as large as 10% in one of the considered cases. A good operating point of time slicing can also maintain a high throughput, while achieving lower call dropping rate and lower power consumption. The results of this paper can provide some important and interesting hints for the system designers.
UR - http://www.scopus.com/inward/record.url?scp=70349671753&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349671753&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2009.5073304
DO - 10.1109/VETECS.2009.5073304
M3 - Conference contribution
AN - SCOPUS:70349671753
SN - 9781424425174
BT - VTC Spring 2009 - IEEE 69th Vehicular Technology Conference
ER -