KR100863224B1 - Rf detecting filter and operating method of rf detecting filter - Google Patents

Abstract

An RF(Radio Frequency) monitoring filter and an operation method of the RF monitoring filter are provided to embed an RF monitoring function in the filter, thereby reducing the size and price of equipment. A filtering unit(131) is configured to filter a transmission signal. A monitoring unit(132) reports a signal level of the transmission signal outputted from the filtering unit to an upper end. The monitoring unit comprises as follows. A branch unit(132a) branches the transmission signal outputted from the filtering unit. A reporting unit(132b) reports the signal level of the branched signal to the upper end.

Description

RF DETECTING FILTER AND OPERATING METHOD OF RF DETECTING FILTER}

The present invention relates to a technique for monitoring RF filters and transmission signals.

The RF filter is widely used as a communication device for filtering an RF signal transmitted or received.

On the other hand, if the strength of the transmitted RF signal (hereinafter referred to as a `` transmission signal '') is outside the appropriate level of the required level, it is difficult for the receiving side to detect the signal (when the transmitted signal is below an appropriate level) or the receiving side. In the mobile communication system, after monitoring (diagnosing) the signal level of a transmission signal, it is possible to cause unexpected damage to the communication devices of the mobile communication system. The transmitting end is configured to adjust the signal level of the transmission signal so that the transmission signal can be transmitted.

As a technique for monitoring a conventional transmission signal, Korean Laid-Open Patent Publication No. 10-2006-0014730 (Applicant: Samsung Electronics Co., Inventor: Cheol-Soo Seo, Name of the Invention: Time-division duplex transmission / reception apparatus using the transmission / reception mode at the same time and using the same Self-diagnostic method) (hereinafter referred to as 'prior art') may be referred to.

In the prior art, a directional coupler is provided between an RF filter (known as BPF in the prior art) and an antenna to monitor the signal level of a transmission signal, and the signal coupled by the directional coupler is further exceeded by an external diagnostic block. The presence or absence is diagnosed.

By the way, according to the prior art as described above, by designing a separate device for monitoring the transmission signal, it was necessary to design in consideration of the space for mounting the monitoring device, which was a factor that increases the size of the system and increases the price. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a technique for implementing a monitoring device inside a filter for monitoring a transmission signal.

RF monitoring filter according to the present invention for achieving the above object, the filtering unit is provided for filtering the transmission signal; And a monitoring unit for reporting a signal level of a transmission signal output from the filtering unit to a higher level. Characterized in that it comprises a.

The monitoring unit may include branching means for branching a transmission signal output from the filtering unit; And reporting means for reporting the signal level of the branch signal branched from the branching means to the upper end. It includes a more specific feature to include.

A detector for detecting and outputting a branch signal branched by the branching means with a voltage; A storage element for storing a comparison table for signal levels for each voltage of the signals; And a central processor for comparing the voltage output from the detector to a comparison table stored in the storage element to determine a signal level of a transmission signal and to report the higher level to the higher level. To include more and more specific features.

The CPU may further calculate an average of a plurality of signal levels according to a plurality of voltages sequentially output from the detector, and then report the average of the calculated signal levels to the upper end.

In addition, the operation method of the RF monitoring filter according to the present invention for achieving the above object, the transmission signal filtering step of filtering the transmission signal; And a transmission signal monitoring step of reporting a signal level of the transmission signal passed through the filtering step to a higher level. Characterized in that it comprises a.

The transmission signal monitoring step may include: a transmission signal branching step of branching a transmission signal that has passed the transmission signal filtering step; And a signal level reporting step of reporting the signal level of the branch signal branched from the transmission signal branching step to the upper end. It includes a more specific feature to include.

The signal level reporting step may include: a detecting step of detecting and outputting a branch signal output by branching in the transmission signal branching step with a voltage; A determination step of determining a signal level according to voltage output through the detecting step; And a reporting step of reporting the signal level determined in the determination step to the upper end. To include more and more specific features.

In the determining step, the signal level of the transmission signal may be determined based on the calculated average of a plurality of signal levels according to a plurality of voltages sequentially output through the detecting step. .

In addition, the signal transmission apparatus of the mobile communication system according to the present invention for achieving the above object, D / A conversion unit for converting the input digital signal into an IF signal and outputs; A signal up-up part configured to output an IF signal output from the D / A converter up to an RF signal; And an RF monitoring filter for filtering the RF signal output from the signal upstream part and outputting the filtered RF signal to a transmission antenna, and detecting the filtered RF signal and reporting a signal level of the transmitted RF signal to an upper level. Characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment according to the present invention as described above will be described in detail.

1 is a block diagram of a signal transmission apparatus 100 (hereinafter, abbreviated as "signal transmission apparatus") of a mobile communication system according to an embodiment of the present invention.

As shown in FIG. 1, the signal transmission apparatus 100 includes a D / A converter 110, a signal uplinker 120, an RF monitoring filter 130, and the like.

The D / A converter 110 converts the input digital signal into an IF signal and outputs the converted IF signal.

The signal upward unit 120 upwardly outputs an IF signal output from the D / A converter 110 as an RF signal.

The RF monitoring filter 130 filters the RF signal output from the signal upstream unit 120 (passes only the required band) and then outputs it to the transmitting antenna (TxA) side, and after detecting the filtered RF signal. It reports the signal level of the transmission signal to the upper stage. The RF monitoring filter 130 is a characteristic configuration of the present invention, and has a detailed configuration as shown in the block diagram of FIG.

As illustrated in FIG. 2, the RF monitoring filter 130 includes a filtering unit 131, a monitoring unit 132, and the like.

The filtering unit 131 is for filtering the RF signal output from the signal upstream unit 120 and includes a band pass filter.

The monitoring unit 132 detects an RF signal output from the filtering unit 131 and reports a signal level of the detected transmission signal to a higher level.

Herein, the monitoring unit 132 built in the RF monitoring filter 130 will be described in more detail. The branch signal branched from the branching unit 132a and the branching unit 132a for branching the transmission signal output from the filtering unit 131. It can be seen that it is configured to include a reporting means (132b) for reporting the signal level of the upper stage.

The branching means 132a may be constituted by a directional coupler or the like.

The reporting means 132b includes a detector 132b-1, a storage element 132b-2, a central processor 132b-3, and the like.

The detector 132b-1 detects and outputs a branch signal branched by the branching means 132a with a voltage (Voltage, V).

The storage element 132b-2 stores a comparison table for signal level (dBm) for each voltage of the signal. Table 1 below is an example of a comparison table.

TABLE 1

Output value (dBm) Detector (Voltage) 43.0 4.00 Measure 42.9 3.99 Calculation 42.8 3.98 Calculation 42.7 3.97 Calculation 42.6 3.96 Calculation 42.5 3.95 Calculation 42.4 3.94 Calculation 42.3 3.93 Calculation 42.2 3.92 Calculation 42.1 3.91 Calculation 42.0 3.90 Measure 41.9 2.90 Calculation 41.8 2.80 Calculation : : : : : : 21.0 1.80 Measure 20.9 1.79 Calculation 20.8 1.78 Calculation 20.7 1.77 Calculation : : : : : : 20.0 1.70 Measure 19.9 1.69 Calculation : : : : : : 18.0 1.50 Measure

As can be seen from Table 1, each of the plurality of voltages corresponds to each signal level dBm. Correspondence between the voltage V and the signal level according to Table 1 is measured or calculated by an experiment, for example, when the voltage V output through the detector 132b-1 is 4 The signal level was measured as 43, and when the voltage V output through the detector 132b-1 is 3.9, the signal level was measured as 42. And the signal level of 0.1dB unit is calculated by dividing 1dB into 10 equal parts.

The central processor 132b-3 compares the voltage V output from the detector 132b-1 to a comparison table stored in the storage element 132b-2 to determine the signal level of the transmission signal, and then the identified signal level. Report to the top. For example, when the voltage V output from the detector 132b-1 is 3.98, the CPU 132b-3 compares the voltage V of 3.98 to the table of Table 1 and compares the voltage of 3.98. The signal level corresponding to (V) is found to be 42.8 dBm, and the determined 42.8 dBm is reported to the upper level as the signal level for the current transmission signal. Here, in the present invention, rather than the signal level for each of the plurality of voltages (V) sequentially output from the detector (132b-1) to be reported to the upper stage, the plurality of outputs sequentially from the detector (132b-1) ( For example, after calculating the average of a plurality of signal levels according to the voltage (V) of 55 times or 20 times), the calculated average is reported to the upper end to reduce the load at the upper end and It is easy to understand the signal level. That is, when voltage (V) is detected sequentially as 3.98, 3.99, ..., 3.97, the signal level obtained by averaging the corresponding 42.8, 42.9, ..., 42.7 dBm will be reported to the upper stage. The signal level of the signal is implemented. Of course, depending on the implementation, it may be possible to take an average of a plurality of voltages V sequentially output, and then obtain a signal level according to the average taken from the table and report the result to a higher level.

An operation method of the RF monitoring filter 130 will be described with reference to the flowchart of FIG. 3 for convenience.

1. Filtering <S310>

The filtering unit 131 filters the input transmission signal. Of course, the filtered transmission signal is output to the transmission antenna (TxA) side.

2. Transmit signal monitoring <S320>

The monitoring unit 132 reports the signal level of the transmission signal that has passed through step S310 to a higher level. This step S320 may be divided into more specific steps as follows.

2-1. Transmission signal branch <S321>

The branching means 132a branches the transmission signal which has passed through step S410.

2-2. Signal level report <S322>

The reporting means 132b reports the signal level of the branch signal branched at step S321 to the upper end. This step S322 can be divided into more specific steps.

2-2a. Detecting <S322a>

The detector 132b-1 detects and outputs a branch signal output by the branch means 132a in step S321 with a voltage.

2-2b. Judgment <S322b>

The central processor 132b-3 compares the voltage V output through step S322a with a table stored in the storage element 132b-2 to determine the signal level of the transmission signal. In this case, the signal level is determined by calculating an average of a plurality of signal levels according to the plurality of voltages V sequentially output through step S322a to determine the signal level of the transmission signal.

2-2c. Report <S322c>

The CPU 132b-3 then reports the signal level determined in step S322b to the upper end.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings. However, since the above-described embodiments have only been described with reference to preferred examples of the present invention, the present invention is limited to the above embodiments. It should not be understood that the scope of the present invention is to be understood by the claims and equivalent concepts described below.

As described in detail above, according to the present invention, there is an effect of reducing the size and cost of equipment by embedding an RF monitoring function in the filter.

1 is a block diagram of a signal transmission apparatus of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram of an RF monitoring filter applied to FIG. 1.

3 is a flowchart illustrating a method of operating the RF monitoring filter of FIG. 1.

* Description of the code for the main parts of the drawings *

100: signal transmission device

110: D / A converter

120: signal upstream

130: RF monitoring filter

131: filtering unit

132: monitoring unit

132a: branching means

132b: Reporting means

132b-1: Detector

132b-2: Storage element

132b-3: Central Processor

Claims (9)

delete A filtering unit provided to filter a transmission signal; And A monitoring unit for reporting a signal level of a transmission signal output from the filtering unit to a higher level; Including, The monitoring unit, Branching means for branching the transmission signal output from the filtering unit; And Reporting means for reporting a signal level of a branch signal branched from the branching means to the upper end; RF monitoring filter comprising a. The method of claim 2, The reporting means, A detector for detecting and outputting a branch signal branched by the branching means with a voltage; A storage element for storing a comparison table for signal levels for each voltage of the signals; And A central processor for comparing the voltage output from the detector to a comparison table stored in the storage element to determine a signal level of a transmission signal and to report the higher level to the upper end; RF monitoring filter comprising a. The method of claim 3, The central processor, after calculating the average of the plurality of signal levels according to the plurality of voltages sequentially output from the detector and reports the average of the calculated signal level to the upper stage. delete A transmission signal filtering step of filtering a transmission signal; And A transmission signal monitoring step of reporting a signal level of the transmission signal passed through the filtering step to an upper level; Including, The transmission signal monitoring step, A transmission signal branching step of branching a transmission signal that has passed the transmission signal filtering step; And A signal level reporting step of reporting a signal level of a branch signal branched from the transmission signal branching step to the upper end; RF monitoring filter operating method comprising a. The method of claim 6, The signal level reporting step, A detecting step of detecting and outputting a branch signal output by branching in the transmission signal branching step with a voltage; A determination step of determining a signal level according to voltage output through the detecting step; And A reporting step of reporting the signal level determined in the determining step to the upper end; RF monitoring filter operating method comprising a. The method of claim 7, wherein In the determining step, the RF monitoring filter is characterized by determining the signal level of the transmission signal using the average calculated by calculating an average of a plurality of signal levels according to a plurality of voltages sequentially output through the detecting step. How to operate. delete