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Ultra wideband interference suppression technique of minimum bit error rate criterion

A technology of interference suppression and bit error rate, applied in the field of ultra-wideband interference suppression technology

Inactive Publication Date: 2011-02-09
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Description
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Problems solved by technology

For narrowband interference with relatively small power, performance can be obtained by exchanging bandwidth and signal-to-noise ratio; for narrowband interference with relatively large power, linear or nonlinear equalization methods are usually used for interference suppression, but these equalizers are is based on the minimum mean square error criterion

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  • Ultra wideband interference suppression technique of minimum bit error rate criterion
  • Ultra wideband interference suppression technique of minimum bit error rate criterion
  • Ultra wideband interference suppression technique of minimum bit error rate criterion

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiments of the present invention, 1. Nonlinear equalizer model: the nonlinear equalizer can be realized by neural network, Volterra series (VolterraSeries, VS), etc., and the present invention adopts VS to realize the nonlinear equalizer. As a nonlinear approximator, VS is a generalization of linear convolution. Let VS(m,p,d (3) ) means that the memory depth is m, the order is p, and the output delay is d (3) The VS model. For VS(m, 2, d (3) ) Volterra equalizers are:

[0031] y k = Σ i = 0 m - 1 h i ( 1 ) x k - i ...

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Abstract

The invention discloses an ultra wideband interference suppression technique of minimum bit error rate criterion, which comprises the following steps of: 1, establishing a nonlinear equalizer model; 2, establishing a target function by using minimum bit error rate as criterion; and 3, adjusting the equalizer parameter by adopting a sliding window random gradient algorithm. The bit error rate of asystem is lower, the interference suppression capability of the system is stronger, the nonlinear function has better approximation performance, and the nonlinear equalizer has more excellent interference suppression capability; the system is simple to control, and the nonlinear equalizer can be switched between the minimum bit error rate criterion and the minimum mean square error criterion; thetechnique is simple to implement, the parameter can be adaptively adjusted, and the parameter of the equalizer can be adaptively adjusted on line by using the sliding window random gradient algorithm; and the technique has wide application range, is used for narrowband interference suppression of an ultra wideband communication system, and is also used in the fields of interference suppression, mode identification and the like of other communication systems.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an ultra-wideband interference suppression technology with the lowest bit error rate criterion. Background technique [0002] Ultra Wideband (UWB for short) technology was first used in the military field as a high-speed broadband wireless communication technology, which was called shock radio in the early days. With the U.S. Federal Communications Commission (FCC) opening up its civilian use, ultra-wideband signals and their specific applications have become a research hotspot in short-distance wireless communications. UWB can not occupy spectrum resources alone, and realize coexistence through spectrum sharing. Under the condition of Gaussian noise, the communication bandwidth can be exchanged with the signal-to-noise ratio, that is, ultra-wide bandwidth can be used to communicate under the condition of extremely low power spectral density. For UWB, if the interference ...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04B1/69
Inventor 朱仁祥
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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