anthonychua
Newbie level 1
qpsk bandwidth
I understand that the bit error performance of BPSK and QPSK are the same. Does this mean that if I fix the transmitter power (eg. 1W), at the receiver I would be able to have the same performance, no matter whether I am using BPSK or QPSK.
Also the Es/No for QPSK is 3dB worse than BPSK. However, since the bandwidth of QPSK is half of BPSK, the noise in a QPSK receiver would also be half of BPSK. Wouldn't it negate the advantage that BPSK have over QPSK.
This is counter-intuitive, as QPSK uses half the bandwidth, and it looks like I’m would always be better off using a QPSK rather than BPSK.
I understand that the bit error performance of BPSK and QPSK are the same. Does this mean that if I fix the transmitter power (eg. 1W), at the receiver I would be able to have the same performance, no matter whether I am using BPSK or QPSK.
Also the Es/No for QPSK is 3dB worse than BPSK. However, since the bandwidth of QPSK is half of BPSK, the noise in a QPSK receiver would also be half of BPSK. Wouldn't it negate the advantage that BPSK have over QPSK.
This is counter-intuitive, as QPSK uses half the bandwidth, and it looks like I’m would always be better off using a QPSK rather than BPSK.
