Capacity and error probability analysis for space time block codes and pulse position amplitude modulation ultra wideband communication systems

The capacity and error probability of space-time block codes (STBC) are derived for PAM/PSK/QAM modulation in different fading channels. The approach is based on an equivalent scalar AWGN (additive white Gaussian noise) channel with a channel gain proportional to the Frobenius norm of the matrix channel for the STBC. Rayleigh, Ricean and Nakagami fading channels are considered. Both independent and correlated fading channels are investigated. The analysis has further extended to a Direct Sequence Code Division Multiple Access (DS-CDMA) multiuser system employing STBC.;A new modulation scheme called pulse amplitude position modulation (PPAM) for Ultra-Wideband (UWB) communication systems is proposed, which combines pulse position modulation (PPM) and pulse amplitude modulation (PAM) to provide good system performance and low computational complexity. The capacity and error probability are presented.