Digital Interference Elimination and Avoidance Method and Device in Digital Interpretation System Through Steel
A steel-piercing, digital technology, applied in the direction of digital transmission system, transmission system, baseband system, etc., can solve the problem that complex data interference signals cannot be eliminated, and achieve the effects of easy engineering implementation, maintaining orthogonality, and improving accuracy
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Embodiment 1
[0080] An embodiment of the present invention provides a method for eliminating digital interference in a steel-piercing digital energy simultaneous transmission system. The steel-piercing digital energy simultaneous transmission system includes: an energy transmission link and a data transmission link, and the method includes:
[0081] At the receiving end of the data transmission link, obtain the data signal after filtering the fundamental wave signal outside the transmission frequency band, wherein the data signal includes: real numbers and complex numbers;
[0082] Adjusting the weight coefficient of the adaptive filter through the weight coefficient iteration formula, so that the interference signal output by the adaptive filter tends to the interference signal in the data signal;
[0083] The interference signal output by the adaptive filter is subtracted from the data signal to obtain the OFDM signal after the interference is eliminated.
[0084] In the method for elimi...
Embodiment 2
[0130] An embodiment of the present invention provides a method for avoiding digital interference in a simultaneous transmission system for digital energy through steel, wherein the simultaneous transmission system for digital energy through steel includes: an energy transmission link and a data transmission link, and the method includes:
[0131] When symbol modulation is performed at the sending end of the data transmission link, 0 will be inserted before the data signal transmitted by the interfered sub-channel, so that the data signal will be transmitted through the next normal sub-channel, wherein the data signal includes: real numbers and complex numbers ;
[0132] Before symbol demodulation is performed at the receiving end of the data transmission link, the data signal before demodulation is multiplied by the avoidance vector, and no symbol demodulation is performed on the transmitted data of the interfered sub-channel.
[0133] In the method for avoiding digital inter...
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