Abstract
In this article, we propose a cyclic delay diversity (CDD) transmission scheme for unique word (UW) OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna transmits a UW-OFDM and then, for every UW-OFDM block, the i-th transmit antenna transmits a cyclically delayed version of the symbols transmitted at the first transmit antenna. With this proposed CDD-OFDM system, each antenna transmission is a UW-OFDM. Also, at the receiver under a certain condition on the cyclic delay amounts, the received signal is equivalent to that of a single transmit antenna UW-OFDM transmission with a longer multipath channel. We design the lengths of UW and cyclic delays to achieve the full multipath and spatial diversities for the CDD-UW-OFDM system when the linear MMSE receiver is used. We then present some simulation results to illustrate the claimed performance of the proposed system.
| Original language | English |
|---|---|
| Pages (from-to) | 1-9 |
| Number of pages | 9 |
| Journal | Science China Information Sciences |
| Volume | 57 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2014 |
| Externally published | Yes |
Keywords
- MIMO-OFDM systems
- cyclic delay diversity (CDD)
- frequency-selective fading channels
- transmit diversity
- unique word (UW)