I have implemented M-PSK modulation and demodulation system using AWGN,convolutional encoder and viterbi decoder.for the 8,16,32 and 256 psk, it give me a correct constellation points but when i used 64 and 128 psk there are some error at the comvolutional encoder and m-psk modulator baseband and it cannot display the constellation diagram
here are the link to download the circuit so that it will be more easier for you to answer my question.
http://www.mediafire.com/?ff4qeoj6blak16t
http://www.mediafire.com/?0e1r9rj9472xfi1
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