Abstract
This paper considers multiuser detection in variable-spreading-length (VSL) multi-rate direct-sequence code division multiple access (DS-CDMA) systems. In such systems, linear multiuser receivers for users transmitting at data rates higher than the basic rate in general need to be time-varying. This makes the adaptive implementation of these receivers difficult. Here, a two-layer spreading code scheme is proposed which facilitates the low complexity adaptive implementation of linear MMSE multiuser receivers in a dual-rate system. Extension of this scheme to more general multi-rate systems is straightforward. It is demonstrated via analysis and simulation results that this scheme achieves good performance.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1369-1373 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 56 |
| Issue number | 3 |
| State | Published - 2002 |
| Event | 56th Vehicular Technology Conference - Vancouver, BC, Canada Duration: Sep 24 2002 → Sep 28 2002 |
All Science Journal Classification (ASJC) codes
- Applied Mathematics
- Electrical and Electronic Engineering
- Computer Science Applications