Title :
Spherical space-time codes (SSTC)
Author :
Terry, John D. ; Heiskala, Juha T.
Author_Institution :
Nokia Inc., Irving, TX, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
We present the extension of the trellis space-time code (STC) concept to include signal mapping drawn from an N-dimensional sphere. The signal points were designed as such to increase the minimum squared distance between points in the constellation without increasing the average transmit energy. The mapping of the N-dimensional spherical constellations was performed in accordance to set partitioning rules for STC developed by AT&T but optimized for these codes. Performance evaluation for these spherical space-time codes (SSTC) are illustrated in an OFDM framework, which is a natural choice for multidimensional signaling.
Keywords :
OFDM modulation; diversity reception; spectral analysis; trellis codes; AT&T; N-dimensional sphere; OFDM; average transmit energy; coding gain; diversity gain; minimum squared distance; multidimensional signaling; partitioning rules; performance evaluation; signal constellation; signal mapping; signal model; signal points; spherical space-time codes; trellis space-time code; Constellation diagram; Fading; Modulation coding; Multidimensional systems; OFDM; Receiving antennas; Signal processing; Space time codes; Transmitting antennas; Wireless communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.913155
