QOSTBC

AcronymDefinition
QOSTBCQuasi-Orthogonal Space-Time Block Code
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References in periodicals archive ?
The detection matrix [D.sub.4] of the QOSTBC can be reformed by eigenvalue feature as:
The relationship (14) is called Dama QOSTBC. In a similar way, we can derive the detection matrix for three transmitted antennas using identical procedure above to discard the interference part.
A new approach for OSTBC and QOSTBC. International Journal of Computer Applications, 67(6): 45-48.
Table 1: Simulation Parameters Parameters Values IFFT/FFT Size 256 Number of active sub-carriers 192 Cyclic prefix length 32 Number of guard bands 28 high, 27 low Number of pilots 8 DC null 1 Modulation schemes QPSK, 16 QAM Channel model Rayleigh fading channel Channel Coding CC with constraint length = 7, rate=1/2 and Interleaving RS (63, 31) code over GF (26) and interleaver concatenated (RS-CC) and interleaver Space Time Coding type Dama QOSTBC Antennas transmitted Power Equally Receiver detection schemes MRC Table 2: 3x1 Dama QOSTBC-OFDM system performance compared with coded system SNR for Proposed System (dB) Modulation BER SNR for RS CC RS-CC used uncoded system (dB) QPSK [10.sup.-4] 15 9.199 8.484 6.669 16-QAM [10.sup.-4] 19.
Four scenarios at the same transmission rate of 2 bits/sec/Hz (the same assumption is in QOSTBC papers [14] [16][17]) are considered in the simulation:
QOSTBC with error in information exchange: it uses a rate 1 QOSTBC matrix without information exchange mitigation and QPSK modulation.
DQOSTBC: it uses a rate 1 QOSTBC matrix and QPSK modulation.
2-4, scenario 1 (a QOSTBC with error in information exchange) is also shown for comparison.
The simulation results show that the proposed full rate full diversity DQOSTBC scheme has lower BER than the QOSTBC with error in information exchange (not full diversity).