This correspondence presents a new signal mapper that maps the maximal rank distance codes to space-time (ST) codes with amplitude modulation phase-shift keying (AM-PSK) constellations. It is shown that this new mapper is rank-distance preserving. Comparing to the multi-radii construction proposed by Hammons, this new mapper has linear increase in the radii and the resulting signal constellations have larger minimum distance and lower peak-to-average power ratio. Variations of this new mapper are also given to provide ST codes with rotated AM-PSK constellations.
- Amplitude modulation phase-shift keying (AM-PSK) constellation
- Diversity gain advantage
- Multiple antennas
- Multiple input multiple output (MIMO)
- Rate-diversity tradeoff
- Space-time (ST) codes
- Unified construction