Extended balanced space–time block coding with transmit antenna selection

Abstract

The original proposal of the extended balanced space–time block coding (EBSTBC) and its special subsets like balanced space–time block coding utilize all available transmit antennas to guarantee full diversity and to maximize the coding gain when few bits of feedback from the destination to the source are available. Because of the construction technique of EBSTBC, an antenna out of N transmit antennas does not contribute coding gain. To prevent this, a novel EBSTBC design and transmit scheme is proposed. This scheme transmits only N − 1 antennas out of N antennas and an antenna that maximizes the received signal‐to‐noise ratio at the destination doubles its transmit power. The proposed scheme improves performance of the EBSTBC and its subsets and outperforms closed‐loop extended orthogonal space–time block codes, phase feedback based extended space–time block codes, partial phase combining and transmit antenna selection schemes. The difference in performance becomes more prevalent in the presence of feedback errors. The proposed technique can be applied for orthogonal space–time block codes and quasi‐orthogonal space–time block codes if the destination informs the source which antenna has the highest gain. Copyright © 2011 John Wiley & Sons, Ltd.

Achieving high diversity and multiplexing gains in the asynchronous parallel relay network

“…Note that communication among relay nodes is not needed, and the on-off decision is based only on local information. The destination node performs fast fourier transform, CP removal and orthogonalised fast symbol-wise detection [16,17]. Compared with the scheme in [9], our proposed scheme achieves the same DMT when there are four relay nodes and better DMT when there are more.…”

“…Checking Equation (21), we can see that X OEn c A Á T is formed according to the GCOD code matrix, and thus can be decomposed according to Equation (5). After the decomposition, we substitute Equations (19) and (20) into (17)…”

Survey on cooperative strategies for wireless relay channels

“…Depending on whether the code can be divided into blocks, ST codes can be classified into two categories: ST trellis code (STTC) and ST block codes (STBC) , with the latter including several variations, such as Khatri‐Rao ST (KRST) code , orthogonal STBC (OSTBC) and quasi‐OSTBC (. Within the ST codes family, the detection complexity of STTC, KRST and quasi‐OSTBC grows rapidly with the number of TA , while only OSTBC enjoys fast decoupled symbol‐wise maximum‐likelihood detection, whose complexity is linear with the number of TAs.…”

Relay selection scheme for cooperative relay networks with distributed orthogonal space-time block coding

“…So, MIMO systems use transmit antenna selection (TAS) to efficiently solve this problem and achieve high system performance [5], [6]. Furthermore, TAS schemes combined with space-time coding have been proposed [7], [8]. In particular, [7] proposed a scheme to combine TAS with STBC, in which N − 1 out of all N transmit antennas are selected to transmit data using an EO-STBC.…”

“…Furthermore, TAS schemes combined with space-time coding have been proposed [7], [8]. In particular, [7] proposed a scheme to combine TAS with STBC, in which N − 1 out of all N transmit antennas are selected to transmit data using an EO-STBC. However, in cooperative wireless relay systems, the cooperative relay nodes have different locations so each transmitted signal from the source node to the destination node must pass through different paths which induce different attenuations into the signals received at the destination, thereby reducing the overall system performance.…”