DSP

DSP Applications

-Modulation / Demodulation

-IQ Imbalance Compensation

-Synchronization

-Filtering

-Error control

-Interleaving

-Signal Analysis

-Speech Compression

Examples - Past Projects

HF/VHF Decoder

-AIS (VHF, GMSK, CRC, Automatic Identification of Ship)

-HC-ARQ (HF, Haegelin-Cryptos simplex ARQ, a mode used by UN and Red Cross services

-ICAO selcal (HF, International Civil Aviation Organization, each address consists of 2 pair of tones

-MIL-STD-188-110 Appendix B (VHF, 39 tone QDPSK, tone spacing 56.25Hz, Reed Solomon Code, interleaving

-MIL-STD-188-141A (HF, Automatic Link Establishment, 8-ARY FSK, Golay Code, interleaving

Signal Analysis

Analysis report on unknown Signal Transmission

-classification on modulation type

-length of burst transmission

-bandwidth of transmission

-baud rate (from instantaneous frequency)

Modulation / Demodulation

-Multi carrier

-OQPSK / M-QAM

-ASK, FSK, PSK