Abstract
Unitary space-time codes were introduced to the digital audio broadcasting (DAB) system, and a multiple-antenna DAB system based on differential unitary space-frequency modulation (DUSFM) was proposed, which adopts a concatenation of convolutional encoder, time interleaver, frequency interleaver and DUSFM. In DUSFM-DAB, the receiver can perform demodulation without channel status information. Theoretical deduction proved that the DUSFM-DAB can obtain full spatial, temporal, and frequency diversities. By Monte Carlo simulation, with time-frequency selective fading 4 × 1 MIMO channel, to achieve a 0.001 bit-error-rate, the performance of the proposal scheme has a 6.5 dB SNR benefit compared with that of the original DAB, while the SNR benefit of CDD-DAB is 1.0 dB in the same condition, which verifies that the DUSFM-DAB has a higher diversity gain.
| Original language | English |
|---|---|
| Pages (from-to) | 695-699 |
| Number of pages | 5 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 27 |
| Issue number | 8 |
| Publication status | Published - Aug 2007 |
Keywords
- Differential modulation
- Digital audio broadcasting (DAB)
- Diversity
- MIMO-OFDM
- Unitary space-time code