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MINIMUM SHIFT KEYING MODULATOR AND DEMODULATOR USING BFSK DEMODULATING METHOD
MINIMUM SHIFT KEYING MODULATOR AND DEMODULATOR USING BFSK DEMODULATING METHOD
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机译:BFSK解调方法的最小移位键控调制器和解调器
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摘要
The device provides the MSK modulation/demodulation method using the BPSK. It is simple to hardware implement and doesn't require the accurate phase difference maintainenance between the signal. The device includes; (a) reverse direction differential coder (41) which processes the transmitting data; (b) a modulator which produces the MSK modulated signal by modulating the mixers (3,9) output with a sinusoidal generator (6) output and phase shifted signal; (c) a mid-frequency reproduction circuit (29) produces the sinusoidal signal which is synchronized with the mid-frequency of MSK modulated signal; and (d) low-pass filters (24,25) which process the mixer output.
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