Fast fixed point processing method used for communication signal blind separation

A communication signal, blind separation technology, applied in the field of signal processing, can solve the problem of not being able to adapt to select the optimal nonlinear function and so on

Inactive Publication Date: 2015-12-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the present invention aims at the defect that the existing non-circular fast fixed point algorithm (nc-FastICA) cannot adapt to the selection of the optimal nonlinear function, and adaptively selects the optimal nonlinear function by analyzing the characteristics of different communication signals. Optimal nonlinear functions, a fast fixed-point processing method for blind separation of communication signals

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  • Fast fixed point processing method used for communication signal blind separation
  • Fast fixed point processing method used for communication signal blind separation
  • Fast fixed point processing method used for communication signal blind separation

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Embodiment Construction

[0038] The technical solution of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

[0039] Such as figure 1 As shown, a system where the main network and the cognitive network coexist.

[0040] In the first time slot, CT transmits data to SR, and CR2 also receives the information at the same time. In order to eliminate the interference between users CR1 and CR2 as much as possible and improve the throughput of the cognitive system, it is assumed that if CR2 receives the CR1 signal and reaches its decodable SINR threshold γ th , then CR2 can correctly decode the signal transmitted from the CT terminal to CR1, and the correct decoding result is used for subsequent interference cancellation, otherwise it cannot be decoded.

[0041] Suppose the maximum transmit power of CT is P C,max , CT with power p 1 Sending a signal, the SINR received by SR is expressed as The interference power of CT to PR is I 1...

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Abstract

The invention belongs to the signal processing technology field, and especially relates to a high-efficiency fast fixed point processing method suitable for communication signal blind separation. Aimed to the defect that a present non-circle fast fixed point algorithm (nc-FastICA) cannot selects an optimal non-linear function adaptively, an optimal non-linear function is selected adaptively through analysis of characteristics of different communication signals, and a fast fixed point processing method used for communication signal blind separation is provided. The separation efficiency is high, performances are stable, the convergence speed is fast, the provided is is raised by about 8-14dB compared with a traditional nc-FastICA algorithm and an ACMN algorithm when the separation communication signals are separated, and the provided method can be widely used for communication signal blind separation.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to an efficient fast fixed point processing method suitable for blind separation of communication signals. Background technique [0002] Blind signal separation is an important issue in signal processing. Because blind signal separation does not require prior knowledge of the source signal and the transmission process, it has broad application prospects in the fields of voice, array, and wireless communication signal processing. Independent component analysis (ICA) is one of the main methods to solve blind signal separation, which makes full use of the independence between the source signals, and maximizes the statistical independence of the estimated source signals by finding a set of linear non-orthogonal transformations. , so as to restore the source signal. [0003] The model of ICA is z=As, where the observed signal z = ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03
Inventor 钱国兵李万春廖红舒魏平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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