Abstract
This paper proposes a π/4-shift QPSK coherent detection demodulator for microcellular TDMA/TDD systems. The demodulator employs a reverse-modulation type carrier recovery circuit with a -π/4 signal phase rotator for coherent detection, and an initial clock recovery circuit for fast synchronization of transmitted bursts. Computer simulation results show that coherent detection with the proposed carrier recovery circuit reduces the irreducible frame error rate by 50% compared with differential detection, and achieves a 4 dB improvement at a frame error rate of 10-2 with transmission diversity in the fading channel typical of personal communication. In addition, the proposed initial clock recovery circuit is useful to avoid hangup and to shorten the preamble bits needed for clock recovery.
| Original language | English |
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| Title of host publication | IEEE Vehicular Technology Conference |
| Publisher | Publ by IEEE |
| Pages | 396-399 |
| Number of pages | 4 |
| ISBN (Print) | 078031266X |
| Publication status | Published - 1993 Jan 1 |
| Event | Proceedings of the 43rd IEEE Vehicular Technology Conference - Secaucus, NJ, USA Duration: 1993 May 18 → 1993 May 20 |
Other
| Other | Proceedings of the 43rd IEEE Vehicular Technology Conference |
|---|---|
| City | Secaucus, NJ, USA |
| Period | 93/5/18 → 93/5/20 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering