| This dissertation studies the use of turbo-coded modulation for wireless communication systems with multiple transmit and receive antennas over Rayleigh fading channels. It describes an effective way of applying turbo-coded modulation as an alternative to the current space-time codes with appropriate interleaving. In addition to the introduction of the turbo-coded modulation scheme, a variety of other issues is considered, including system design for the case of a large number of antennas, the effects of estimated channel state information and correlation among subchannels between different transmit and receive antenna pairs. Examples are presented to illustrate the performance of the turbo-coded modulation scheme, and significant performance gains over the appropriately interleaved space-time trellis codes are observed.; In the second part of the dissertation, the performance of space-time codes is analyzed. Performance bounds are considered for both space-time trellis codes and turbo-coded modulation for systems with transmit and receive antenna diversity. The bounds are derived by limiting the conditional union bound before averaging over the fading process. It is demonstrated that this approach provides a tight upper bound on the error probability of space-time codes. For the turbo-coded modulation for multiple antenna systems, the weight enumerating function is derived in order to take into account the presence of transmit and receive antenna diversity. Examples of the bounds are presented to illustrate their usefulness. |
