Abstract
The Alamouti orthogonal spacetime block code for two transmit antennas was designed primarily for QAM and PSK modulations, and we have previously generalized it for the continuous phase modulation (CPM), denoted as OST-CPM, by maintaining the orthogonality (for the fast ML decoding/demodulation) and the phase continuity of two signals from two transmit antennas. In this paper, we design orthogonal-like spacetime coded CPM systems for three and four transmit antennas based on orthogonal and quasi-orthogonal spacetime codes. Although the signals from transmit antennas in the proposed orthogonal-like spacetime coded CPM systems are not orthogonal, the fast decoding/demodulation is maintained like the two transmit antenna case. Simulation results show that the performance of the proposed orthogonal-like spacetime coded CPM systems for four transmit antennas is much better than that of the OST-CPM systems for two transmit antennas.
| Original language | English |
|---|---|
| Article number | 5429101 |
| Pages (from-to) | 1135-1146 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Information Theory |
| Volume | 56 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2010 |
Keywords
- Continuous phase modulation (CPM)
- Orthogonal spacetime block codes
- Quasi-orthogonal spacetime block codes
- Spacetime coding
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