Abstract
We present herein a differential space-time-frequency (DSTF) modulation scheme for systems with two transmit antennas over frequency-selective fading channels. The proposed DSTF scheme employs a concatenation of a spectral encoder and a differential encoder/mapper, which are designed to yield the maximum spatio-spectral diversity and significant coding gain. To reduce the decoding complexity, the differential encoder is designed with a unitary structure that decouples the maximum likelihood (ML) detection in space and time; meanwhile, the spectral encoder utilizes a linear constellation decimation (LCD) coding scheme that encodes across a minimally required set of subchannels for full diversity and, hence, incurs the least decoding complexity among all full-diversity codes.
| Original language | English |
|---|---|
| Pages (from-to) | 349-351 |
| Number of pages | 3 |
| Journal | IEEE Communications Letters |
| Volume | 7 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2003 |
Keywords
- Differential modulation
- Frequency-selective fading
- Linear constellation decimation (LCD) codes
- Maximum spatio-spectral diversity
- Space-time coding