DATA TRANSMISSION METHOD AND RELATED DEVICE AND SYSTEM
First Claim
1. A data transmission method, comprising:
- performing, by a transmitter, scrambling, constellation modulation, and multiple-input multiple-output precoding processing sequentially on downlink user data to obtain a precoded symbol sequence;
performing, by the transmitter, time-frequency resource mapping on the precoded symbol sequence to obtain frequency domain data of an orthogonal frequency division multiplexing symbol;
performing, by the transmitter, conjugate symmetric extension and inverse fast Fourier transform on the frequency domain data of the orthogonal frequency division multiplexing symbol to obtain a time domain real-number sequence;
performing, by the transmitter, cyclic prefix insertion processing on the time domain real-number sequence to form a first downlink time domain baseband signal;
loading, by the transmitter, the first downlink time domain baseband signal onto a direct current of a light-emitting diode lighting circuit to form a light-emitting diode driving electrical signal; and
converting, by the transmitter, the light-emitting diode driving electrical signal into a visible beam of the light-emitting diode for transmission.
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Abstract
Embodiments of the present invention disclose a data transmission method and a related device and system. A data transmission method includes: A transmitter performs scrambling, constellation modulation, and multiple-input multiple-output precoding processing sequentially on downlink user data to obtain a precoded symbol sequence; performs time-frequency resource mapping on the precoded symbol sequence to obtain frequency domain data of an OFDM symbol; performs conjugate symmetric extension and IFFT on the frequency domain data of the OFDM symbol to obtain a time domain real-number sequence; performs CP insertion processing on the time domain real-number sequence to form a first downlink time domain baseband signal; loads the first downlink time domain baseband signal onto a direct current of a LED lighting circuit to form a LED driving electrical signal; and converts the LED driving electrical signal into a visible beam of the LED for transmission.
22 Citations
18 Claims
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1. A data transmission method, comprising:
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performing, by a transmitter, scrambling, constellation modulation, and multiple-input multiple-output precoding processing sequentially on downlink user data to obtain a precoded symbol sequence; performing, by the transmitter, time-frequency resource mapping on the precoded symbol sequence to obtain frequency domain data of an orthogonal frequency division multiplexing symbol; performing, by the transmitter, conjugate symmetric extension and inverse fast Fourier transform on the frequency domain data of the orthogonal frequency division multiplexing symbol to obtain a time domain real-number sequence; performing, by the transmitter, cyclic prefix insertion processing on the time domain real-number sequence to form a first downlink time domain baseband signal; loading, by the transmitter, the first downlink time domain baseband signal onto a direct current of a light-emitting diode lighting circuit to form a light-emitting diode driving electrical signal; and converting, by the transmitter, the light-emitting diode driving electrical signal into a visible beam of the light-emitting diode for transmission. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A data transmission method, comprising:
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performing, by a transmitter, scrambling, constellation modulation, multiple-input multiple-output precoding, and discrete Fourier transform processing sequentially on uplink user data to obtain a discrete Fourier transform symbol sequence; performing, by the transmitter, single-carrier frequency division multiple access resource mapping on the discrete Fourier transform symbol sequence to obtain frequency domain data of a single-carrier frequency division multiple access symbol; performing, by the transmitter, conjugate symmetric extension and inverse fast Fourier transform on the frequency domain data of the single-carrier frequency division multiple access symbol to obtain a time domain real-number sequence; performing, by the transmitter, cyclic prefix insertion processing on the time domain real-number sequence to form a first uplink time domain baseband signal; loading, by the transmitter, the first uplink time domain baseband signal onto a direct current of a light-emitting diode lighting circuit to form a light-emitting diode driving electrical signal; and converting, by the transmitter, the light-emitting diode driving electrical signal into a visible beam of the light-emitting diode for transmission. - View Dependent Claims (8, 9, 10)
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11. A transmitter, comprising:
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a first processing unit, configured to perform scrambling, constellation modulation, and multiple-input multiple-output precoding processing sequentially on downlink user data to obtain a precoded symbol sequence; a second processing unit, configured to perform time-frequency resource mapping on the precoded symbol sequence obtained by the first processing unit, to obtain frequency domain data of an orthogonal frequency division multiplexing symbol; a third processing unit, configured to perform conjugate symmetric extension on the frequency domain data of the orthogonal frequency division multiplexing symbol, wherein the frequency domain data of the orthogonal frequency division multiplexing symbol is obtained by the second processing unit; a fourth processing unit, configured to perform inverse fast Fourier transform on the frequency domain data obtained after the conjugate symmetric extension is performed by the third processing unit, to obtain a time domain real-number sequence; a fifth processing unit, configured to perform cyclic prefix insertion processing on the time domain real-number sequence obtained by the fourth processing unit, to form a first downlink time domain baseband signal; a sixth processing unit, configured to load the first downlink time domain baseband signal onto a direct current of a light-emitting diode lighting circuit to form a light-emitting diode driving electrical signal; and a seventh processing unit, configured to convert the light-emitting diode driving electrical signal into a visible beam of the light-emitting diode for transmission. - View Dependent Claims (12, 13, 14, 15)
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16. A transmitter, comprising:
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a first processing module, configured to perform scrambling, constellation modulation, multiple-input multiple-output precoding, and discrete Fourier transform processing sequentially on uplink user data to obtain a discrete Fourier transform symbol sequence; a second processing module, configured to perform single-carrier frequency division multiple access resource mapping on the discrete Fourier transform symbol sequence obtained by the first processing module, to obtain frequency domain data of a single-carrier frequency division multiple access symbol; a third processing module, configured to perform conjugate symmetric extension on the frequency domain data of the single-carrier frequency division multiple access symbol, wherein the frequency domain data of the single-carrier frequency division multiple access symbol is obtained by the second processing module; a fourth processing module, configured to perform inverse fast Fourier transform on the frequency domain data obtained after the conjugate symmetric extension is performed by the third processing module, to obtain a time domain real-number sequence; a fifth processing module, configured to perform cyclic prefix insertion processing on the time domain real-number sequence obtained by the fourth processing module, to form a first uplink time domain baseband signal; a sixth processing module, configured to load the first uplink time domain baseband signal onto a direct current of a light-emitting diode lighting circuit to form a light-emitting diode driving electrical signal; and a seventh processing module, configured to convert the light-emitting diode driving electrical signal into a visible beam of the light-emitting diode for transmission. - View Dependent Claims (17, 18)
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Specification