‎In wireless communication systems‎, ‎space-time codes are applied to encode data when multiple antennas are used in the receiver and transmitter‎. ‎The concept of diversity is very crucial in designing space-time codes‎. ‎In this paper‎, ‎using the equivalent definition of full diversity space-time codes‎, ‎we first characterize all real and complex $2times 2$ rate one linear dispersion space-...

This talk presents a new approach for achieving both full rate and full transmit diversity. The techniques in this talk work on a symbol by symbol basis and so are called spatial modulators. When there is only a single receive antenna, the goal is to design the modulator at each transmit antenna so that(even for the worst case realization of the channel coefficients) the scheme achieves the cap...

in recent years reflectarray antennas have received considerable attention due to their unique capabilities. however, due to their large size, analyzing the performance of these antennas using traditional full wave finite-difference and finite-element techniques requires considerable computational resources. in this paper, we present an efficient method to accurately analyze these class of ante...

| The use of multiple transmitter and receiver antennas allows to transmit multiple signal substreams in parallel and hence to increase communication capacity. In order to distribute the multiple signal substreams over the MIMO channel, linear spacetime codes have been shown to be a convenient way to reach high capacity gains with a reasonable complexity. The space-time codes that have been int...

In this paper, a class of Generalized Quasi-Orthogonal Space-Time Block Code is proposed to achieve full-rate transmission with low-complexity maximum likelihood decoding. Full transmit-diversity is achieved through rhe constellation rotation technique. Code construction criteria for this class of code are listed. Average lideterminant criterion is proposed for optimizing the degree of constell...

Exciting recent developments in wireless multiantenna communications have led to designs aiming mainly at one of two objectives: either high-performance by enabling the diversity provided by multi-input multi-output (MIMO) channels or high-rates by capitalizing on space-time multiplexing gains to realize the high capacity of MIMO fading channels. By concatenating a linear complex-field coder (a...