More recently, there has been a move towards utilizing multilevel coding schemes based on coherent optical communication and phase-shift keying, which allow even greater bit rates to be carried on a ...
BPSK31 is an extremely popular mode for amateur radio operators; it’s efficient and has a narrow bandwidth and can be implemented with a computer sound card or an Arduino. Just like it says on the tin ...
Phase coherence, that is a stable phase relationship between signals, is essential when making measurements that require more than one RF output. While this was once primarily required when evaluating ...
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