Method for capturing pseudo-code of weak relevant non-gauss channel

A Gaussian channel, weak correlation technology, applied in electrical components, transmission systems, etc., can solve problems such as performance degradation

Inactive Publication Date: 2009-08-19
如皋市生产力促进中心
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Disadvantages: When the detector is applied to a direct spread si

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  • Method for capturing pseudo-code of weak relevant non-gauss channel
  • Method for capturing pseudo-code of weak relevant non-gauss channel
  • Method for capturing pseudo-code of weak relevant non-gauss channel

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[0050] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0051] Under the weakly correlated non-Gaussian channel environment, the locally optimal detector can achieve the best capture performance, and the pseudo code capture structure of the present invention can be seen in the appended figure 2, first pass the received signal through the in-phase / orthogonal two paths, carry out carrier wave separation and pseudo-code despreading processing, and the pseudo-code capture corresponds to the hypothesis testing problem, given the observation and in H 0 and H 1 Judgments are made in two states, where, H 0 : | τ - τ ^ | ≥ 1 Corresponds to the uncaptured state; H 1 : | τ ...

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Abstract

The invention provides a pseudo code capturing method under weak correlation non-Gaussian channel. For weak correlation non-Gaussian noise environment, pseudo code capturing is equivalent to hypothesis testing problems, weak correlation non-Gaussian noise is modeled as a single-order sliding average SaS noise model, a local optimum detection algorithm is utilized to deduce pseudo code capturing detection statistics under the weak correlation non-Gaussian noise environment so as to obtain a pseudo code two-dimensional capturing structure and a simplified form thereof under a weak correlation noise model. Property simulation comparison is carried out between the pseudo code two-dimensional capturing structure and the traditional pseudo code capture structure. The simulation results show that the detection property of the capturing structure is improved greatly under the correlation non-Gaussian noise environment.

Description

(1) Technical field [0001] The present invention relates to a signal processing method, in particular to a pseudocode capture method. (2) Background technology [0002] The spread spectrum system is widely used in the field of military and civilian communication and navigation because of its strong anti-interference ability, good confidentiality, and anti-multipath fading. But these advantages can only be obtained when the local pseudo-code is synchronized with the receiving pseudo-code, and the synchronization of the pseudo-code is the basic problem of spread spectrum technology. Synchronization is divided into coarse synchronization and fine synchronization, that is, signal capture and tracking. Acquisition means that the local pseudocode sequence is aligned with the received pseudocode within a certain range (usually within half a chip), and acquisition is the premise of tracking. In practice, the assumption of an independent Gaussian distribution is often not valid due...

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Application Information

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IPC IPC(8): H04B1/707H04B1/7075
Inventor 沈锋孙枫徐定杰王家欢张清波薛冰郝燕玲黄平
Owner 如皋市生产力促进中心
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