Quadrature Phase Shift Keying四相相移键控 Quaternary Phase Shift Keying四相相移键控 Quadrature Phase-Shift Keying四相移相键控 Quadrs Phase Shift KeyQuadrs相移键 Quadriphase Shift KeyQuadriphase Shift键 Quaternary Phase Shift Keying (transmission encoding)季相移键控(传输编码) Quadrative Phase-Shift KeyingQuadrative键与相位