Multiple antenna systems are an appealing candidate for emerging fourthgeneration wireless networks due to its potential to exploit space diversity for increasing conveyed throughput without wasting bandwidth and power resources. It is widely accepted that the performance of digital communication systems can be considerably improved once the channel state information (CSI) is used to optimize the transmit signal. In this book, the problem of the design of a power allocation strategy in LST architecture to simultaneously optimize coding, diversity and weighting gains is addressed. The book also considered a more practical scenario by assuming imperfect CSI at the receiver. The effect of channel estimation errors in LST architecture with an iterative PIC receiver is investigated. In order to validate the effectiveness of the schemes, substantial simulation results are provided. This book is mainly intended for advanced level students, professional communication engineers and researchers involved in coding and telecommunication research.