OFDM signal modulation-demodulation method, device and system based on compressed sensing

摘要

An OFDM signal modulation method based on compressed sensing is provided, the method includes: acquiring a demodulation parameter of a receiver, where the demodulation parameter includes Tnyq of a periodic square signal of the receiver in sampling, Tnyq is a length of a minimum timeslot during which the periodic square signal maintains a high level or a low level; performing an OFDM modulation on an inputted information symbol to generate an OFDM baseband signal, and controlling a sampling interval TsampleOFDM=Ts/k of the OFDM baseband signal to be integral multiple of Tnyq, where Ts is a duration of valid data in the OFDM baseband signal, and k is the number of sub-carriers in the OFDM baseband signal; and up-converting the OFDM baseband signal and transmitting the processed signal to the receiver. Also provided are a demodulation method, device and system.

主权项

1. A method for modulating an Orthogonal Frequency Division Multiplexing (OFDM) signal based on compressive sensing in a wireless communication system, comprising:
acquiring, by a transmitter, demodulation parameters of a receiver, wherein the demodulation parameters comprises Tnyq of a periodic square signal used by the receiver in sampling, wherein Tnyq is a length of a minimum timeslot during which the periodic square signal maintains a high level or a low level; performing, by the transmitter, an OFDM modulation on an input information symbol to generate an OFDM baseband signal, and controlling, a sampling interval TsampleOFDM=Ts/k of the OFDM baseband signal to be integral multiples of Tnyq, wherein Ts is a duration of valid data in the OFDM baseband signal, and k is a total number of subcarriers in the OFDM baseband signal; and up-converting, by the transmitter, the OFDM baseband signal and transmitting the up-converted OFDM baseband signal to the receiver.