Multicarrier non-linear clipping distortion compressed sensing estimation method of relieving observation interference
A compressive sensing and clipping distortion technology, applied in modulation carrier systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as clipping distortion, affecting the reconstruction performance of compressive sensing algorithms, and improve the measurement signal-to-noise ratio. , Effective and reliable data processing capacity, the effect of improving the anti-nonlinear interference ability and communication performance
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[0109] Figure 8 An overall block diagram of an OFDM receiver including a clipping distortion suppression module according to an embodiment of the present invention. Channel estimation and sub-channel demapping are the basic steps of traditional OFDM receivers, which are not included in the inventions of this patent application. image 3 It is a specific implementation block diagram of the OFDM clipping distortion compressed sensing reconstruction and suppression scheme proposed by the present invention to alleviate observation interference. The present invention will be described in detail below with reference to other drawings and in combination with embodiments. The parameters of designing OFDM system are shown in Table 1.
[0110] Table 1
[0111] project parameter Sampling rate(GHz) 1 IFFT / FFT length 2048 Subcarrier spacing (MHz) 0.488 Number of subcarriers N 512 Modulation 16-QAM Clipping rate(dB) 1.5 / 2 / 2.5 Measurin...
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