KR0160902B1 - Method and apparatus for selecting anti-jamming in frequency hopping system - Google Patents

Abstract

The present invention relates to an anti-jamming selection apparatus and method in a frequency hopping system for accurately determining a bin including transmission information in a dehopped base frequency channel. The bins having the largest signal level were selected by adding the signal levels of the bins having the same order from the 1st bin to the Nth bin, which was not detected in the present invention. Multiply by multiplying the values of M hops from 1 to each bin (1,2, N) in the bin, and selecting and outputting the bin having the largest result among these multiplication results, thereby transmitting on the de-hopped base frequency channel. By accurately determining the bin containing the signal, an error due to jamming noise or the like can be prevented in advance.

Description

Anti-jamming selector and method in frequency hopping system

1 illustrates an example of a frequency hopping transmission signal.

2 shows an example of a dehopped transmission signal.

3 is a block diagram illustrating an apparatus for hopping transmission data information in a frequency hopping system according to the present invention.

4 is a block diagram illustrating an apparatus for dehopping hopped transmission data information received from FIG.

5 is a view for explaining the de-hopping process according to the present invention as an example.

* Explanation of symbols for the main parts of the drawings

30: A / D conversion unit 32: transmission unit forming unit

34: pattern data storage unit 36: hopping processing unit

38: transmission processing unit 40: reception processing unit

42: pattern data storage unit 44: de-hopping processing unit

46: sample extraction unit 48: D / A conversion unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency hopping system system, which is one of spread spectrum communication systems. In particular, the present invention relates to a bin including transmission information in a dehopping basic frequency channel. An anti-jamming selection and method in a frequency hopping system for accurately determining.

Jamming refers to intentionally generating noise to interfere with communication and generating an error on the data information to be transmitted. Anti-jamming means coping with such jamming. . In addition, the decision means determining which of 1-N bins is a bin in which the signal is included.

For example, the present invention as described above can be applied to the wireless communication of the code division multiple access method using spread spectrum, and also to the cellular phone and the personal mobile communication method using the code division multiple access in the future.

In general, spread spectrum communication systems are being used for military purposes, and are currently applied to wireless communication using code division multiple access.

A frequency hopping system, one of the spread spectrum communication systems, hops a transmission signal from one center frequency to another to spread the frequency spectrum.

This spreading process is controlled by a pseudo random sequence, which is performed completely randomly, but the receiver can perform the despreading process by reproducing the pseudo random sequence and synchronizing with the received signal.

FIG. 1 shows an example of a frequency hopping transmission signal by the frequency hopping system as described above, in which one channel is divided into N bins and is transmitted to the second bin from one bin to N bins. An example of communicating by performing frequency hopping with a data symbol to M frequency.

That is, instead of transmitting all data symbols through one channel, one data symbol is divided into M pieces of data, and each divided data is transmitted through an arbitrary channel, and data is transmitted through a second bin of each channel. .

The data thimble is a basic unit of transmission / reception including information in communication, and a bin is a unit capable of transmitting one of information from 1 to N by dividing a channel into N pieces.

As described above, the pattern of hopping a frequency to a random channel is controlled by a pseudo random sequence and is performed at random. The receiver reproduces the pseudo random sequence and then dehopes by synchronizing the pseudo random sequence to a received signal to receive a received signal. Is converted to the fundamental frequency channel.

The dehopping is to receive data symbols transmitted through several different channels and to collect them in the same channel.

For example, if a signal is transmitted by frequency hopping M number containing the data symbol to be transmitted in the second bin among the first to N bins, as shown in FIG. The data symbols transmitted are collected on the fundamental frequency channel.

Then, in the fundamental frequency channel obtained by de-hopping as described above, the signal levels of bins having the same order from the 1st bin to the Nth bin are added to each hop to select the bin having the largest signal level, and then the bin is selected. It is determined that the bean contains the signal.

In other words, the bin determination means determining to include a transmission signal (information data to be sent by the transmitting side) among the first to Nth bins.

However, in the frequency hopping system as described above, jamming noise is generated in which various radio waves other than the target radio wave are received when the transmission signal is received, whether intentionally or unintentionally.

Therefore, if a large jamming noise occurs in one hop, it is difficult to accurately determine the bin including the transmission signal. Because it is easy to occur, the reception performance becomes worse.

In addition, the transmission signal may be weakened not only by the jamming noise as described above, but also by various factors such as noise on the channel and an error generated in transmission and reception, and an error may be generated when the bin is increased even when the power is increased in another bin.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to accurately determine the bin containing the transmission signal in the de-hopping fundamental frequency channel to prevent the determination error due to jamming noise, etc. An anti-jamming selector in a frequency hopping system is provided.

It is another object of the present invention to provide an anti-jamming selection method in a frequency hopping system capable of accurately determining a bin including a transmission signal in a dehopping basic frequency channel to prevent a determination error.

According to an aspect of the present invention for achieving the above object, in the anti-jamming selection device in the frequency hopping system for de-hopping the received hopping transmission data information: the hopping data information through a receiving antenna A receiving processor 40 which receives the received signal and filters the received channel band in a predetermined channel band; A pattern data storage unit 42 for storing the same pattern data as the pattern information applied to the hopping apparatus, and updating the stored pattern information; A dehopping processor 44 for dehopping the bin of the channel provided from the receiving processor 40 based on the pattern information updated and input from the pattern data storage 42; Each bin (1, 2, N) in the dehopped fundamental frequency channel from the dehopping processor 44 multiplies the value of M hops from 1 to the result of each multiplied bin (1, 2, N). And a sample extractor 46 for selecting and outputting a predetermined bin having the largest multiplication value among the values.

Further, according to another aspect of the present invention for achieving the above object, an anti-jamming selection method in a frequency hopping system for de-hopping received hopping transmission data information: each bin in the hopping basic frequency channel A multiplication step of multiplying the values of M hops from 1 for each (1, 2, N); A comparison step of comparing the magnitudes of the multiplication values of the bins (1, 2, N) obtained by the multiplication step; And a selection step of selecting and outputting a predetermined bin having the largest result value based on the comparison result of the comparison step.

Hereinafter, the present invention will be described in detail with reference to the illustrated drawings.

3 is a block diagram illustrating an apparatus for hopping data information of a transmission signal in a frequency hopping system according to the present invention.

3 is an apparatus for hopping data information of a transmission signal, and includes an A / D converter 30, a transmission unit forming unit 32, a pattern data storage unit 34, a hopping processing unit 36, and a transmission processing unit 38. And a transmitting antenna.

When the information to be transmitted is an analog signal, the A / D converter 30 converts the analog signal into a digital signal and provides the same to the transmission unit forming unit 32 described later, or when the information to be transmitted is a digital signal. Is configured to be provided to the transmission unit forming unit 32, which will be described later.

The transmission unit forming unit 32 is configured to classify the information to be transmitted in a predetermined transmission unit and then provide the hopping processing unit 36 to be described later.

The pattern data storage unit 34 stores pattern information capable of hopping a bin of a channel into a predetermined form. The pattern data storage unit 34 is configured to update the stored pattern information to be provided to the hofill processing unit 36 to be described later. The same applies to the dehopping apparatus.

The hopping processor 36 hops the bin of the channel provided from the transmission unit forming unit 32 on the basis of the pattern information updated and input from the pattern data storage 34 to the transmission processor 38 to be described later. It is configured to be.

The transmission processor 38 is configured to perform an operation of outputting the hopped data information provided from the hopping processor 36 through the transmitting antenna.

4 is a block diagram showing an apparatus for dehopping data information of a hopped transmission signal from FIG. 3.

4 is a device for dehopping data information of a transmission signal, which includes a reception antenna, a reception processing unit 40, a pattern data storage unit 42, a dehopping processing unit 44, a sample extraction unit 46, and a D / A. It consists of a converter 48.

The reception processor 40 is configured to receive the hopped information through the reception antenna and to filter the channel information into a predetermined channel band and then provide the hopping information to the dehopping processor 44 to be described later.

The pattern data storage unit 42 stores the same pattern data as the pattern information applied to the hopping apparatus, and is configured to update the stored pattern information and provide the same to the dehopping processing unit 44 to be described later.

The dehopping processor 44 de-hopes the bins of the channels provided from the receiving processor 40 based on the pattern information updated and input from the pattern data storage 42 to the sample extractor 46 described later. It is configured to be provided.

The sample extractor 46 obtains each bin (1,2, N) obtained by multiplying a value of 1 to M hops for each bin (1,2, N) in the de-hopped base frequency channel from the dehopping processor 44. The predetermined bin having the largest result value from among the result values of ") is selected to be provided to the recovery apparatus 48 after the D / A conversion described below.

The D / A converter 48 is configured to convert digital information of the bin selected by the sample extractor 46 into an analog signal and provide the analog signal to a recovery device.

Referring to the present invention configured as described above in detail as follows.

Based on the operation of FIG. 3 described above, the data information to be transmitted transmits hopping information (e.g., corresponding to FIG. 1) through the transmitting antenna, and the number of de-hopping devices shown in FIG. Received to the receiving processing unit 40 through the credit antenna.

The reception processor 40 filters the hopped information into a predetermined channel band and then provides the information to the dehopping processor 44. The dehopping processor 44 filters the information and the pattern data storage 42 filtered into the predetermined band. Based on the updated pattern information, the data is provided to the sample extracting section 46 in the form as shown in FIG.

The sample extractor 46 multiplies the values of the M hops from 1 to each bin (1, 2, N) in the de-hopped base frequency channel provided by the de-hopping processor 44 to obtain a result value.

As an example, referring to FIG. 5, a result value (1 × 1 × 20 × 1 × 1 × 1 = 20) for each hop of the first bin and a result value (10 ×) for each hop of the second bin 11 × 10 × 8 × 10 × 11 = 968000, the result for each hop in the third bin (1 × 1 × 1 × 25 × 1 × 1 = 25), and each hop in the fourth bin. The resulting value (70 × 1 × 1 × 1 × 1 × 1 = 70) is obtained, and the values (20, 25, 70, etc.) in the predetermined bins are generated by jamming noise.

The bins having the largest bin value are selected by comparing the result values of the bins.

This means that the bin (e.g., the second bin) where the original signal (data information) is conventionally has a large value evenly, but the bin value containing jamming noise is multiplied by the smaller values (noise-free hops). They become smaller.

Accordingly, the sample extractor 46 extracts a predetermined bin from the largest value, passes through the D / A converter 48, or outputs the de-hobbed data information to the restoration apparatus. Accurate data information can be restored.

In addition, this invention can be modified in the range which does not deviate from the above-mentioned embodiment, and does not deviate from the technical summary of this application.

As described above, according to the present invention, by accurately determining a bin including a transmission signal in a dehopped basic frequency channel, an error due to jamming noise or the like can be prevented in advance.

Claims (2)

An anti-jamming selection apparatus in a frequency hopping system for de-hopping received hopping transmission data information, comprising: a receiving processor (40) receiving the hopping data information through a receiving antenna and filtering the received hopping data information into a predetermined channel band Wow; A pattern data storage unit 42 for storing the same pattern data as the pattern information applied to the hopping apparatus, and updating the stored pattern information; A dehopping processor 44 for dehopping the bin of the channel provided from the receiving processor 40 based on the pattern information updated and input from the pattern data storage 42; Each bin (1, 2, N) in the dehopped fundamental frequency channel from the dehopping processor 44 multiplies the value of M hops from 1 to the result of each multiplied bin (1, 2, N). An anti-jamming selector in a frequency hopping system, characterized in that it comprises a sample extractor (46) for selecting and outputting a predetermined bin having the largest multiplication value among the values. An anti-jamming selector in a frequency hopping system for dehopping received hopped transmission data information, comprising: multiplying a value of 1 to M hops for each bin (1,2, N) in the hopped fundamental frequency channel A multiplication step; A comparison step of comparing the magnitudes of the multiplication values of the bins (1, 2, N) obtained by the multiplication step; And a selection step of selecting and outputting a predetermined bin having the largest result value based on the comparison result of the comparison step.