A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems

Chih-Wen Chang, Chien Cheng Kuo

研究成果: Conference contribution

1 引文 (Scopus)

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 262009 四月 29

Other

OtherVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
國家Spain
城市Barcelona
期間09-04-2609-04-29

指紋

Multicarrier
Slicing
Code Division multiple Access
Code division multiple access
Assignment
Interference
Time division multiple access
Power control
Electric power utilization
DS-CDMA
Throughput
Interval
Multiple Access
Power Control
High Throughput
Power Consumption
Frequency Domain
Division
Flexibility

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

引用此文

Chang, C-W., & Kuo, C. C. (2009). A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems. 於 VTC Spring 2009 - IEEE 69th Vehicular Technology Conference [5073304] https://doi.org/10.1109/VETECS.2009.5073304
Chang, Chih-Wen ; Kuo, Chien Cheng. / A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems. VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009.
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Chang, C-W & Kuo, CC 2009, A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems. 於 VTC Spring 2009 - IEEE 69th Vehicular Technology Conference., 5073304, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, Barcelona, Spain, 09-04-26. https://doi.org/10.1109/VETECS.2009.5073304

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

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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.

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Chang C-W, Kuo CC. A low interference time-slicing code assignment for the 2D-spread MC-DS-CDMA systems. 於 VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009. 5073304 https://doi.org/10.1109/VETECS.2009.5073304