Patent ID: 11968073
Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An integrated circuit, comprising:
a plurality of quadrature phase shift keying (QPSK) modulators, wherein a first one of the QPSK modulators generates a first QPSK signal, and a second one of the QPSK modulators generates a second QPSK signal, wherein outputs from the QPSK modulators are differential signals, and the differential signals are converted to single-ended signals to avoid signal cross-overs; and
a combiner circuit that generates a quadrature amplitude modulation (QAM) signal that is transmitted by a transmitter, the QAM signal being generated based on the first QPSK signal and the second QPSK signal.