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PN SN blind estimation method and device

A blind estimation and sequence code technology, applied in the field of electronic countermeasures and information processing, can solve the problems of long code PN sequences that cannot be estimated and complicated operations.

Inactive Publication Date: 2007-11-28
HARBIN ENG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all have some shortcomings such as only realizing the estimation of the short code PN sequence, but not being able to estimate the long code PN sequence; or complicated calculations.

Method used

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  • PN SN blind estimation method and device
  • PN SN blind estimation method and device
  • PN SN blind estimation method and device

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Embodiment 1

[0036] 3, the device of this embodiment includes a receiving antenna 21, a signal preprocessing unit 22, an analog-to-digital conversion unit 23, and a microprocessor 24. The microprocessor includes a delay module 11 with a delay time of one symbol width, and a multiplication module 12. Periodic segment accumulation module 13, filter binarization module 14, delay multiplication and inverse operation module 15, and decision module 16.

[0037] After the high frequency direct spread signal received by the antenna passes through the signal preprocessing unit (mixing or down-conversion or amplification) 22, the analog-to-digital conversion unit 23 converts the analog signal into a digital signal, and sends the digital signal to the microprocessor In the device, the microprocessor delays the input digital signal with a delay time of one symbol width and then multiplies the input digital signal with the input digital signal. The calculated signal is segmented in units of PN sequence cyc...

Embodiment 2

[0039] 4, the device of this embodiment includes a receiving antenna 21, a signal preprocessing unit 22, a delay multiplying unit 25 whose delay time is one symbol width, an analog-to-digital conversion unit 23, and a microprocessor 24. The microprocessor includes a cycle The segment accumulation module 13, the filtering module 14, the binarization module 14, the delay multiplication and inverse operation module 15, and the decision module 16.

[0040] After the signal received by the antenna is processed by the signal preprocessing unit (such as frequency conversion or mixing or amplification, etc.), the signal is first delayed with a delay time of one symbol width, and then multiplied with the original signal, and analog-to-digital conversion The device performs analog-to-digital conversion on the multiplied signal, and sends the converted digital signal to the microprocessor. The microprocessor performs segmentation processing on the input signal in units of pseudo-random seque...

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Abstract

The invention discloses a PN sequent code typed blind estimating method and device, which is characterized by the following: multiplying the spread-spectrum communicating signal modulated by input BPSK directly; segmenting periodically; filtering; proceeding two valuing; delaying inverse operation of multiplying and decision; proceeding blind estimation for pseudorandom sequence (PN) in the spread-spectrum communicating signal; realizing blind estimation for long-code or short-code PN sequence with rapid speed.

Description

(1) Technical field [0001] The invention belongs to the field of electronic countermeasures and information processing, and in particular relates to a technique for estimating pseudo-random (PN) sequence code pattern blind estimation in BPSK modulated direct spread spectrum communication signals. (2) Background technology [0002] Direct spread communication technology is widely used in civil communication systems. In order to realize radio management, it is necessary to estimate the pseudo-random sequence pattern of the other party, that is, the PN sequence pattern. At present, there are many methods to realize the blind estimation of PN sequence pattern, such as G. Bure and other methods of applying eigenvalue analysis, F. Dominique, etc. proposed a blind estimation method of PN sequence based on the HEBB principle, and related cumulative PN sequences proposed by Tan Mantang. Blind estimation method, PN sequence pattern blind estimation method based on Messi algorithm proposed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L27/18H04B1/7073
Inventor 钟志陈丹
Owner HARBIN ENG UNIV
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