CODE MODULATION AND DEMODULATION METHODS, APPARATUSES, AND SYSTEM

摘要

The present invention relates to the field of signal processing, and discloses code modulation and demodulation methods, apparatuses, and a system, so as to reduce an envelope fluctuation degree of a signal and improve system performance. A specific implementation method includes: receiving, by a sending apparatus, N channels of bit signals, and performing serial-to-parallel conversion on any channel of bit signal of the N channels of bit signals, to generate two channels of first bit signals; performing delay control on the two channels of first bit signals, to generate two channels of code bit signals; performing QAM mapping on the two channels of code bit signals and other N−1 channels of bit signals, to generate a channel of quadrature electrical signal and a channel of in-phase electrical signal; modulating the quadrature electrical signal and the in-phase electrical signal, to obtain a transmit signal.

主权项

1. A sending apparatus, comprising:
a receiver, configured to: receive N channels of bit signals, and a processor, configured to: perform serial-to-parallel conversion on any channel of bit signal of the N channels of bit signals, to generate two channels of first bit signals, wherein N is a natural number greater than 1; perform delay control on the two channels of first bit signals, to generate two channels of code bit signals, wherein the two channels of code bit signals differ by one clock cycle T; perform quadrature amplitude modulation (QAM) mapping on the two channels of code bit signals and other N−1 channels of bit signals, to generate a channel of quadrature electrical signal and a channel of in-phase electrical signal, wherein four quadrants of the in-phase electrical signal and the quadrature electrical signal are determined by bit values that correspond to the two channels of code bit signals at a same moment; and modulate the quadrature electrical signal and the in-phase electrical signal, to obtain a transmit signal.