Mohammad Sigit Arifianto and Ali Chekima and Mohd Yunus Hamid and Liawas Barukang and D., V. Viswacheda (2007) Overloaded minimum total squared correlation signatures based pilot aided system for MC-CDMA and STBC MC-CDMA. Journal of Applied Sciences, 7 (15). pp. 2146-2153. ISSN 1812-5654
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Abstract
This paper proposes multiple-access schemes based on Overloaded Minimum Total Squared Correlation (TSC) signatures, namely Pilot Aided Multi-Carrier Code-Division Multiple-Access (MC-CDMA) and Pilot Aided Space Time Block Codes (STBC) MC-CDMA. Since overloaded minimum TSC signatures were used as the spreading codes, a number of sub-channels in the MC-CDMA and STBC MC-CDMA schemes were not utilized for data transmission. These empty sub-channels can be exploited for comb-type pilot signaling. To maintain low system complexity, for the pilot sub-channels Least Square (LS) estimation was employed and for interpolating the characteristics of the data sub-channels linear interpolator was applied. The validity of the schemes is confirmed by comparing them with the original MC-CDMA method using Walsh-Hadamard orthogonal codes and also with Walsh-Hadamard based STBC MC-CDMA with block-type pilot. All systems use Equal Gain Combining (EGC) or Maximum Ratio Combining (MRC) in the MC-CDMA block at the receiver. The simulation result shows that although the spreading codes of interest are not fully orthogonal codes, for a low number of users the systems under investigation performed better than their Walsh-Hadamard based counterpart. This will be valuable for Wireless Personal Area Network (PAN) where the number of users is typically low. © 2007 Asian Network for Scientific Information.
| Item Type: | Article |
|---|---|
| Keyword: | Minimum total squared correlation (TSC), Multi-carrier-code-division multiple-access (MC-CDMA), Space time block codes (STBC) |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering > TK5101-6720 Telecommunication Including telegraphy, telephone, radio, radar, television |
| Department: | SCHOOL > School of Engineering and Information Technology |
| Depositing User: | ADMIN ADMIN |
| Date Deposited: | 04 May 2011 13:59 |
| Last Modified: | 16 Oct 2017 13:16 |
| URI: | https://eprints.ums.edu.my/id/eprint/2903 |
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