Receiver based on multiple frequency-shift keying modulation and receiving method thereof
AssigneeXiamen Zifisense InfoTech Co., Ltd.
InventorsDelai Zheng, Zhuoqun Li
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Abstract
A receiving method based on multiple frequency-shift keying (M-FSK) modulation. The method comprises performing M-FSK demodulation on a frame structure comprising a preamble frame, a SYNC frame, and a data frame. The performing comprises: performing the M-FSK demodulation of the preamble frame using an autocorrelation time-frequency synchronization technology; performing the M-FSK demodulation of the preamble frame using a time-frequency synchronization technology using cross-correlation sliding fast Fourier transform (FFT); and performing the M-FSK demodulation of at least one of the SYNC frame or the data frame using an M-FSK data demodulation technology using adaptive and scalable FFT.
Claims13
A receiving method based on multiple frequency-shift keying (M-FSK) modulation, comprising:
- performing M-FSK demodulation on a frame structure comprising a preamble frame, a SYNC frame, and a data frame, wherein the performing comprises:
- demodulating the preamble frame comprising performing the M-FSK demodulation of the preamble frame using an autocorrelation time-frequency synchronization technology when the preamble frame is a repeating sequence and each symbol uses the M-FSK modulation;
- and performing the M-FSK demodulation of the preamble frame using a time-frequency synchronization technology using cross-correlation sliding fast Fourier transform (FFT) when the preamble frame is a non-repeating sequence;
- and
- demodulating at least one of the SYNC frame or the data frame comprising performing the M-FSK demodulation of the SYNC frame and the data frame using an M-FSK data demodulation technology using adaptive and scalable FFT.
A receiving method based on multiple frequency-shift keying (M-FSK) modulation, comprising:
- performing M-FSK demodulation on a frame structure comprising a preamble frame, a SYNC frame, and a data frame, wherein the performing comprises:
- demodulating the preamble frame comprising performing signal-to-noise ratio (SNR) test and time-frequency synchronization of the preamble frame by using an autocorrelation time-frequency synchronization technology when the preamble frame is a repeating sequence and each symbol uses the M-FSK modulation;
- and performing the SNR test and the time-frequency synchronization of the preamble frame using a time-frequency synchronization technology using a cross-correlation sliding fast Fourier transform (FFT) when the preamble frame and is a non-repeating sequence;
- and
- demodulating at least one of the SYNC frame or the data frame comprising obtaining a maximum likelihood test performance using an M-FSK data demodulation technology using adaptive and scalable FFT.
Dependencies are inferred from the claim text.