Loading...
Please wait, while we are loading the content...
Combining Quasi-Orthogonal Space-Time Coding and Antenna Selection in MIMO-Systems
| Content Provider | Semantic Scholar |
|---|---|
| Author | Badic, Biljana |
| Copyright Year | 2004 |
| Abstract | We present a method to combine Quasi-Orthogonal SpaceTime Codes (QSTBCs) for 4 transmit antennas with antenna selection [1] to achieve high diversity order with a simple decoding algorithm on uncorrelated and correlated multipl e input/multiple output (MIMO) channels. Our selection rule minimizes the average Bit Error Ratio (BER) and improves the system diversity even if only a simple zero-forcing (ZF) receiver is used. We show that using the best antenna subset from more than 4 available transmit antennas we can substantially improve diversity and the coding gain of space-time code compared to the case when only 4 transmit antennas are used. We consider a nt × nr MIMO channel and assume quasi-static flat Rayleigh fading. The channel coefficientshi,j are modelled as complex zero mean Gaussian random variables with unit variance, i.e. hi,j ∼ N(0, 1). We assume perfect channel knowledge at the receiver and partial channel knowledge at the transmitter provided by a low feedback rate. For transmission we use the QSTBC for nt = 4 and nr = 1 [2] where four symbolss1 to s4 are transmitted in four time slots: |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://publik.tuwien.ac.at/files/pub-et_9069.pdf |
| Alternate Webpage(s) | https://publik.tuwien.ac.at/files/pub-et_9069.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
