Abstract
In this paper, a new 2-antenna transmit diversity, called orthogonal space-time spreading transmit diversity (OSTSTD) combined with delay transmission, is proposed. At the transmitter, N data symbols to be transmitted are spread using N different orthogonal space-time spreading codes (each represented by N × N matrix) and are transmitted from two transmit antennas after adding different time delays. At the receiver, 2-step space-time despreading is carried out to recover the N transmitted data symbols. The first step recovers the N orthogonal spatial channels by taking the correlation between the received space-time spread signal and the time-domain spreading codes. The second step recovers the N transmitted data symbols using minimum mean square error (MMSE) despreading. The average bit error rate (BER) performance in a Rayleigh fading channel is evaluated by computer simulation. It is confirmed that the OSTSTD provides better BER performance than the Alamouti's space-time transmit diversity (STTD) at the cost of transmission time delay.
| Original language | English |
|---|---|
| Pages (from-to) | 2120-2127 |
| Number of pages | 8 |
| Journal | IEICE Transactions on Communications |
| Volume | E88-B |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2005 |
Keywords
- Fading channel
- Space-time spreading
- Transmit diversity
ASJC Scopus subject areas
- Software
- Computer Networks and Communications
- Electrical and Electronic Engineering