Abstract
This paper presents a novel HF band differential quadrature phase-shift keying (DQPSK) orthogonal frequency-division multiplexing (OFDM) communication system. The system can deliver 3.6 kbps with a bandwidth of about 3 kHz. In a digital modem, OFDM with 32-point fast Fourier transform is used. In the system, each subcarrier uses DQPSK modulation. Hence, a demodulator does not require carrier phase recovery and symbol timing recovery. And, each subcarrier employs CRC error check code individually. By using CRC code for each subcarrier, bit error caused by multipath fading can be recovered simply.
| Translated title of the contribution | DQPSK OFDM-Based HF-Band Communication System with Individual Subcarrier |
|---|---|
| Original language | Korean |
| Pages (from-to) | 800-804 |
| Number of pages | 5 |
| Journal | 전기전자학회논문지 |
| Volume | 22 |
| Issue number | 3 |
| DOIs | |
| State | Published - Oct 2018 |