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Carrier frequency estimating method and device

A carrier frequency, blind estimation technology, applied in electrical components, interference to communications, etc., can solve the problems of slow operation speed, signal-to-noise ratio cannot be lower than -15dB, etc., to achieve fast estimation, fast operation speed, simple structure and other problems. Effect

Inactive Publication Date: 2007-10-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods and devices for blindly estimating the carrier frequency of wireless communication signals with BPSK modulation. method to realize carrier frequency estimation, but this method has disadvantages such as slow operation speed

Method used

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  • Carrier frequency estimating method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In conjunction with Fig. 2, after the wireless communication signal of BPSK modulation that antenna 21 receives passes through preprocessing unit 22 (down-conversion or amplifier), the signal passes through A / D conversion unit 23, and digital signal is input in microprocessor 24, and microprocessor The device can be FPGA, DSP, ARM, computer, etc. After the delay time of the microprocessor is one sampling unit time delay, the input digital signal is multiplied by the multiplier, and the power spectrum operation is performed to make a judgment (such as: spectrum The maximum peak on the graph corresponds to the point on the spectrogram of the 2 times the frequency of the carrier frequency), which realizes the blind estimation of the carrier frequency.

Embodiment 2

[0039] 3, after the BPSK-modulated wireless communication signal received by the antenna 21 passes through the pre-processing unit 22 (down-conversion or amplifier), the delay time through the delay unit 11 is not equal to zero and is very small (such as: less than 2π / ω o 1 / 8) of the delay, and the original signal is multiplied by the multiplier 12, and then the spectrum calculation unit 25 (spectrum analyzer, etc.) is used to realize the estimation of the carrier frequency.

Embodiment 3

[0041] 4, after the BPSK-modulated wireless communication signal received by the antenna 21 passes through the pre-processing unit 22 (down-conversion or amplifier), the passing delay time is not equal to zero and is very small (such as: less than 2π / ω o 1 / 8) of the delay unit 11, and the original signal is multiplied by the multiplier 12, and the digital signal is input into the microprocessor 24 by the A / D conversion unit 23, and the microprocessor performs spectrum calculation to realize the Estimation of carrier frequency.

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Abstract

The blind estimation method for DS / SS signal parameter comprises: using the delay time as the minimal sampling time (not equal to zero) for delaying the input BPSK-modulated wireless signal, multiplying the delayed signal with original signal, calculating power spectrum for the multiplied signal, and thereby realizes the blind estimation. This invention reduces signal noise efficiently, simplifies system structure, and improves calculation speed.

Description

(1) Technical field [0001] The invention belongs to the field of electronic countermeasures and information processing, and in particular relates to a method for estimating a carrier frequency blind estimation in a BPSK modulated communication signal and using the method to develop a device for realizing carrier frequency blind estimation. (2) Background technology [0002] Wireless communication technology is widely used in communication systems. In order to realize radio management, it is necessary to estimate the carrier frequency of the opposite station. At present, there are many methods and devices for blindly estimating the carrier frequency of wireless communication signals with BPSK modulation. method to realize carrier frequency estimation, but this method has disadvantages such as slow operation speed. (3) Contents of the invention [0003] The purpose of the present invention is to provide a new method and device for estimating the carrier frequency which can ...

Claims

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Application Information

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IPC IPC(8): H04K3/00
Inventor 钟志陈丹
Owner HARBIN ENG UNIV