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• 08:43, 21 August 2024 Destevez talk contribs created page Gr4-packet-modem waveform design (Created page with "This page documents all the aspects of the waveform used by gr4-packet-modem. == Modulation == The modulation is a single-carrier RRC (root-raised-cosine) filtered PAM (pulse amplitude modulation) waveform. The RRC filter has a roll-off of 0.35. The following constellations are defined. There are provisions in the modem to use higher-order constellations for the payload data. * BPSK. Formed by the points 1, -1, which encode the bits 0 and 1 respectively. This is...")