MODULATOR FOR BINARY PHASE SHIFT KEYING(BPSK)/QUADRATE PHASE SHIFT KEYING(QPSK) OF WIDE BAND CDMA SYSTEM

摘要

It disclose broadband CDMA system BPSK /qpsk modulator combination. Modulator includes the first link selection device, and for receiving the input I and Q signal of forward channel, to execute the band spectrum modulation of reverse channel signals or execute band spectrum modulation selection modulation scheme, and it receives I signal from forward channel and Q signal passes through. T chain circuit devices are selected to execute the Hadamard band spectrum modulation devices of Hadamard codes extension; D Hadamard, about the I signal and Q signal of extension modulation, including the PN code expanding units for executing the extension modulation of pseudo noise (PN) code.