Abstract
The communication performance can be restricted by inevitable training overhead for acquiring channel state information (CSI). A space–time code (STC)-based cooperative communication scheme is proposed to reduce the training overhead by employing a two-antenna relay node (RN) that broadcasts merely two orthogonal pilot sequences from the two antennas to a source node (SN) and a destination node (DN). The received signal-to-noise ratio, the achievable rate, and the bit error rate are mathematically analyzed, and numerical results confirm that the proposed STC-based relay system increases the achievable rate irrespective of the number of antennas at SN and DN.
| Original language | English |
|---|---|
| Pages (from-to) | 1043-1050 |
| Number of pages | 8 |
| Journal | ICT Express |
| Volume | 10 |
| Issue number | 5 |
| DOIs | |
| State | Published - Oct 2024 |
Keywords
- Channel estimation overhead
- Cooperative communications
- Multiple-input multiple-output
- Space–time code
- Spatial diversity gain