Qpsk decreases the bandwidth
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I learnt that bandwidth is the bit rate. But when I was learning Qpsk I came across this sentence
"For a given bit rate the transmission bandwidth required for Qpsk is half as that of Psk."
I know that in Qpsk a symbol contains two bits and the duration of the symbol is twice that of the PSK but I couldn't quite understand the above sentence.
Any help "for dummies" would be appreciated.
Thanks in advance.
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