Abstract
The next generation mobile communications system is anticipated to support data rates up to and exceeding 100Mbps. In this paper, we consider a DS-CDMA high-speed downlink packet access (HSDPA) as in 3G W-CDMA systems. Adaptive modulation and coding (AMC), multicode operation and hybrid automatic repeat request (HARQ) will be the enabling technologies. With such high-speed data transmissions, however, multicode operation severely suffers from destruction of orthogonality among the spreading codes since the wireless channel becomes severely frequency-selective. In this paper, we apply frequency-domain equalization (FDE) instead of conventional rake combining for receiving the packet. It is shown that the use of FDE for the reception of multicode signal gives an improved throughput irrespective of the channel's frequency-selectivity.
| Original language | English |
|---|---|
| Pages (from-to) | 689-693 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 60 |
| Issue number | 1 |
| Publication status | Published - 2004 Dec 1 |
| Event | 2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States Duration: 2004 Sep 26 → 2004 Sep 29 |
Keywords
- AMC
- DS-CDMA
- HARQ
- HSDPA
- MMSE-FDE
- Multicode
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics