Multiple transmit and receive antennas can be used in wireless systems to achieve high data rate communication. Recently, efficient space–time codes have been developed that utilize a large portion of the available capacity. These codes are designed under the assumption that the transmitter has no knowledge about the channel. In this work, on the other hand, we consider the case when the transm...

Multiple antennas at both the transmitter and receiver ends of a wireless digital transmission channel may increase both data rate and reliability. Reliable high rate transmission over such channels can only be achieved through Space–Time coding. Rank and determinant code design criteria have been proposed to enhance diversity and coding gain. The special case of full-diversity criterion requir...

The paper presents a method of estimating channel parameters in wireless communications using space-time block coding (STBC). Moreover, in this paper, the concept of STBC is reviewed, the system model is described, the estimation method is derived, and the system performances have been simulated using MATLAB.

We study simple space-time coding techniques for multiple-input multiple-output (MIMO) quasi-static channels (2Tx and 4Tx) capable of achieving near outage limit performance. The core of our space-time code is an h-π-diagonal state multiplexer that guarantees full diversity and a quasi-optimal coding gain on the MIMO channel. The whole range of word error probability is attained at signal-to-no...

This contribution proposes cooperative MIMO with randomized distributed space-time coding (R-DSTC) for the 802.16m system description document (SDD). Purpose To incorporate cooperative MIMO with R-DSTC proposed herein into the IEEE 802.16m system description document (SDD). Notice This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It repr...

A wireless communication system using multiple antennas promises reliable transmission under Rayleigh flat fading assumptions. Design criteria and practical schemes have been presented for both coherent and non-coherent communication channels. In this paper we generalize one dimensional phase shift keying (PSK) signals and introduce space time constellations from generalized phase shift keying ...

transmitter diversity I just need to put these keywords into a coherent statement space-time codes geometric uniformity uniform distance spectrum code design design metrics effective product distance effective Hamming distance rank and determinant criteria delay diversity

Abstract – Design of space-time codes is based on the statistical analysis of the propagation channel. As knowledge of the channel characteristics is not available at the transmitter, the improvement introduced by antenna diversity is primarily relying on the channel having uncorrelated signal paths. We introduce a combination of eigenbeamforming with orthogonal space-time block codes at the tr...

We take a capacity view of a number of different space-time coding (STC) schemes. While the Shannon capacity of multipleinput multiple-output (MIMO) channels has been known for a number of years now, the attainment of these capacities remains a challenging issue in many cases. The introduction of space-time coding schemes in the last 2–3 years has, however, begun paving the way towards the atta...

| We analyze di erent space-time architectures for the TDD mode of UTRA when employing multi-element antenna arrays at both the transmit and receive sites. We compare space-time codes that do not require channel knowledge at the transmitter with a beamforming scheme, which exploits channel reciprocity available in the TDD mode to construct a beamvector at the transmitter.