yubingz
Junior Member level 3
i want to choose Low IF architecture.
there have a question.
when i use 2MHz IF, zeros-crossing detector can't count 1 cross point more than IF. Because for IF, there have 4 zero crossing points, but for symbol "1", the frequency is 2.14MHz and there have 4.28 zeros crossing points.
how can I distintuish the "0" and "1"?
although consider IQ, the "1" should have 8.56 points and the "0" should have 7.44 pionts.
how to explain it? I read some paper implemented the bluetooth receiver by 2MHz IF and zero-crossing detector.
there have a question.
when i use 2MHz IF, zeros-crossing detector can't count 1 cross point more than IF. Because for IF, there have 4 zero crossing points, but for symbol "1", the frequency is 2.14MHz and there have 4.28 zeros crossing points.
how can I distintuish the "0" and "1"?
although consider IQ, the "1" should have 8.56 points and the "0" should have 7.44 pionts.
how to explain it? I read some paper implemented the bluetooth receiver by 2MHz IF and zero-crossing detector.
