Nonparametric estimation ICA-based MIMO-OFDM system blind deconvolution method

A MIMO-OFDM and blind deconvolution technology, applied in the field of blind deconvolution of MIMO-OFDM systems based on non-parametric estimation ICA, can solve problems such as poor results

Inactive Publication Date: 2011-04-20
NANJING UNIV
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Problems solved by technology

[0003] In the MIMO-OFDM system, due to the introduction of the guard interval, the inter-symbol interference ISI is eliminated. However, there are inter-subchannel interference ICI and multiple access interference MAI in the system, which require time equalization and space equalization. poor

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  • Nonparametric estimation ICA-based MIMO-OFDM system blind deconvolution method
  • Nonparametric estimation ICA-based MIMO-OFDM system blind deconvolution method
  • Nonparametric estimation ICA-based MIMO-OFDM system blind deconvolution method

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Embodiment Construction

[0071] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings and technical solutions.

[0072] The blind deconvolution method of MIMO-OFDM system based on non-parametric estimating ICA includes two parts: a transmitter and a receiver, and the transmission part is mainly based on a wireless channel.

[0073] figure 1 It is a MIMO-OFDM system transmitter structure based on non-parametric estimation ICA. The transmitter includes a channel precoding module, a serial-to-parallel conversion module, a constellation mapping module, a subcarrier mapping module, a signal preprocessing module, and an IFFT / IDFT module, insert cyclic prefix CP module, digital-to-analog conversion module and carrier modulation module; figure 2 It is a MIMO-OFDM system receiving end structure based on non-parametric estimating ICA. The receiving end includes an analog-to-digital conversion module, a CP removal module, an FFT / DFT m...

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Abstract

The invention discloses a nonparametric estimation independent component analysis (ICA)-based multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system blind deconvolution method. The method comprises the following steps of: combining nonparametric estimation ICA and MIMO-OFDM; arranging a signal preprocessing module at a transmitting end of the MIMO-OFDM system to perform non-redundant linear precoding on a frequency domain signal mapped to a subcarrier so as to eliminate fuzziness of an independent component analysis algorithm in reconstructed signal sorting and energy; and arranging a nonparametric ICA module at a receiving end of the system to perform channel estimation so as to restore a source signal. By the method, frequency spectrum resource is saved, the amount of calculation is reduced, the operational speed is increased and a time-varying channel can be estimated well.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to probability density function estimation, Parzen window estimation, Gaussian kernel estimation, quasi-Newton, minimum mutual information entropy, independent component analysis, adaptive channel estimation, MIMO-OFDM system, blind deconvolution and other technologies , specifically a blind deconvolution method for MIMO-OFDM systems based on non-parametric estimating ICA. Background technique [0002] MIMO-OFDM technology is one of the core technologies of the fourth generation mobile communication. The MIMO (Multiple Input Multiple Output) technology utilizes multiple antennas to suppress channel fading. This technology uses multiple antennas to utilize spatial degrees of freedom, so that the system can obtain spatial multiplexing gain or spatial diversity gain. The MIMO technology can greatly increase the capacity of the channel by configuring multiple antennas a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04L25/02H04L27/26
Inventor 成孝刚李勃安明伟唐岚董蓉吴聪刘晓男陈启美
Owner NANJING UNIV
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