|
Use of gmsk2 versus simple_framer & simple_correlator. The project I am working on has the following
characteristics: 1. Remote
telemetry using optical link. For proof of concept need to measure
temperature from multiple sensors (5 thermocouples). The temperature is
represented by 8 bit word and sampled every 0.2 seconds per thermocouple (limited
by the MAX6675 chip). This would results in data rate of 200 bits/sec. 2. Carrier
frequency – 1 KHz to 2 KHz due to the modulator we are presently using
for the proof of concept. In phase II we will have the funds to improve
the modulator and increase the frequencies. For proof of concept we will
have two transmitters at different carrier frequency, 1Khz and 2 Khz. 3. ASK
modulation. – turning on/off a reflected optical beam that is illuminating
the transmitter. 4. The data is
continuously transmitted and the microprocessor controlling the modulation is
very limited on what it can implement (cant do CRC32). Please let me know what you suggest. Erric – thanks for the references on the Meuller &
Muller synchronizer and Digital Communication Receivers. Mike |
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