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Definition of "Quadrature Phased Shift Keying" |
Quadrature phased shift keying is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts. QPSK allows the signal to carry twice as much information as ordinary PSK using the same bandwidth. / The Packet Data Network GW is the point of interconnect between the EPC and the external IP networks. These networks are called Packet Data Network, hence the name. The PDN GW routes packets to and from the PDNs. |
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