Abstract
In this paper, orthogonal frequency division multiplexing - code division multiplexing (OFDM-CDM) using an efficient dynamic channel allocation (DCA) is proposed as a valid candidate for a next-generation multiple access scheme. Assuming perfect knowledge of the channel information for multiple users, a considerable amount of multi-user diversity gain can be obtained with OFDM-CDM through adaptation of DCA compared to multi-carrier CDMA (MC-CDMA). Comparing to conventional OFDMA using DCA, an additional frequency diversity gain also can be achieved by proposed system. In particular, computational complexity can be much alleviated by joint combination of the subband (SB) based DCA and the maximum ratio combining (MRC) instead of subcarrier based DCA and the minimum mean square error combining (MMSEC) method at the receiver. The simulation results show that proposed OFDM-CDM outperforms conventional MC-CDMA and OFDMA using DCA with respect to BER and computational complexity.
| Original language | English |
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| Pages | 46-50 |
| Number of pages | 5 |
| Publication status | Published - 2005 |
| Event | Proceedings - 6th World Wireless Congress, WWC - San Francisco, CA, United States Duration: 2005 May 25 → 2005 May 27 |
Other
| Other | Proceedings - 6th World Wireless Congress, WWC |
|---|---|
| Country/Territory | United States |
| City | San Francisco, CA |
| Period | 05/5/25 → 05/5/27 |
All Science Journal Classification (ASJC) codes
- Engineering(all)