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Method and apparatus for realizing parallel correlator with mixed correlation method in spread spectrum communication

A technology of spread spectrum signal and partial correlation, which is applied to electrical components, transmission systems, etc., and can solve problems such as working frequency and sampling frequency limitations

Inactive Publication Date: 2008-11-12
MAISHI ELECTRONICS (SHANGHAI) LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have some limitations in operating frequency and sampling frequency

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  • Method and apparatus for realizing parallel correlator with mixed correlation method in spread spectrum communication
  • Method and apparatus for realizing parallel correlator with mixed correlation method in spread spectrum communication
  • Method and apparatus for realizing parallel correlator with mixed correlation method in spread spectrum communication

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Embodiment Construction

[0075] Other features and advantages of the present invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, wherein like numerals refer to like elements.

[0076] Although parallel correlators provide a relatively high-speed acquisition process, in practice, it is difficult to implement 1023 parallel integrators in hardware. In order to achieve equivalent parallel integration, some existing technologies either increase the scale of the hardware or select a high relative operation frequency. The present invention provides an advantageous method and apparatus that implements a large number of equivalent parallel integrators and reduces hardware complexity. In addition, the invention makes the working frequency of the correlator flexible and variable, and has lower requirements on the sampling frequency, which means that the baseband signal processing chip is compatible with various RF front-end chips with ...

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Abstract

This invention provides a method and a device for realizing parallel correlators with a mixed correlation method in a frequency spreading communication relating to a method for processing frequency spreading signals by two steps of integral process in a circuit, in which, said circuit includes an IF signal process unit and several blocking integrators, said circuit receives a digital signal, a local reference signal and a false random noise code. The method includes: utilizing said digital signal and local reference signal to generate several data flows by the IF signal process unit, each blocking integrator receives a data flow and said false random noise code to use the mixed correlation technology to carry out correlated operations of preset quantity in each blocking integrator to get part of the operation result to compute the complete correlated operation result based on the part result and said each data flow is generated in every other preset time section.

Description

technical field [0001] The present invention relates to spread spectrum digital signal processing, more specifically to the realization method and device of parallel correlator for processing spread spectrum digital signal. Background technique [0002] Spread spectrum communication has its advantages in communication applications that require high reliability in noisy environments. According to Shannon's theorem, the need for a high signal-to-noise ratio can be reduced by widening the frequency spectrum, which shows that weak signals can be transmitted and detected using spread spectrum communication techniques. To spread the spectrum, a high-speed pseudorandom noise code (PRN) is often used to modulate a narrowband signal to generate a wideband signal. The wideband signal is modulated by the information data stream in order to convey the data. The information data rate is usually much lower than the symbol (chip) rate of the PRN code, and usually the data is edge-synchro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04B1/708H04B1/709
Inventor 李世杰程明强俞波
Owner MAISHI ELECTRONICS (SHANGHAI) LTD