TWI805939B - Tuner device and signal-to-noise ratio measurement method thereof - Google Patents

Tuner device and signal-to-noise ratio measurement method thereof Download PDF

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TWI805939B
TWI805939B TW109126988A TW109126988A TWI805939B TW I805939 B TWI805939 B TW I805939B TW 109126988 A TW109126988 A TW 109126988A TW 109126988 A TW109126988 A TW 109126988A TW I805939 B TWI805939 B TW I805939B
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signal
noise
noise ratio
circuit
tuner device
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TW202207643A (en
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張天財
黃清壽
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立積電子股份有限公司
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Abstract

A tuner device and a signal-to-noise ratio measurement method thereof are provided. A tuner circuit tunes a radio frequency signal to generate a tuned signal. A demodulator circuit demodulates the tuning signal to generate a demodulated signal. A signal-to-noise ratio calculation circuit generates a signal-to-noise ratio signal according to the demodulated signal and a received signal strength indication value of the radio frequency signal received by the tuner device.

Description

調諧器裝置及其訊雜比量測方法Tuner device and its signal-to-noise ratio measurement method

本發明是有關於一種信號處理裝置，且特別是有關於一種調諧器裝置及其訊雜比量測方法。The present invention relates to a signal processing device, and in particular to a tuner device and its signal-to-noise ratio measurement method.

在習知技術中，在對量產的調諧器積體電路良率檢測時，通常會利用外部測試儀器來進行訊雜比量測。此方式雖可有效地檢測出調諧器積體電路的訊雜比，然由有檢測效率不佳的問題，因此如何在不降低良率檢測準確度的前提下有效提高檢測效率，進而降低測試成本為一亟待解決的問題。In the prior art, when testing the yield rate of mass-produced tuner integrated circuits, an external test instrument is usually used to measure the signal-to-noise ratio. Although this method can effectively detect the signal-to-noise ratio of the tuner integrated circuit, it has the problem of poor detection efficiency. Therefore, how to effectively improve the detection efficiency without reducing the accuracy of yield detection, thereby reducing the test cost is an urgent problem to be solved.

本發明提供一種調諧器裝置及其訊雜比量測方法，可精確且快速地檢測調諧器裝置的訊雜比，而可有效降低調諧器裝置的測試成本。The invention provides a tuner device and its signal-to-noise ratio measurement method, which can accurately and quickly detect the signal-to-noise ratio of the tuner device, and can effectively reduce the test cost of the tuner device.

本發明的調諧器裝置包括調諧器電路、解調器電路以及訊雜比計算電路。調諧器電路調諧射頻信號而產生調諧信號。解調器電路耦接調諧器電路，解調調諧信號而產生解調信號。訊雜比計算電路耦接調諧器電路，依據解調信號與調諧器裝置接收的射頻信號的接收訊號強度指示值產生訊雜比信號。The tuner device of the present invention includes a tuner circuit, a demodulator circuit and a signal-to-noise ratio calculation circuit. The tuner circuit tunes the radio frequency signal to generate a tuned signal. The demodulator circuit is coupled to the tuner circuit and demodulates the tuned signal to generate a demodulated signal. The signal-to-noise ratio calculation circuit is coupled to the tuner circuit, and generates a signal-to-noise ratio signal according to the demodulated signal and the received signal strength indicator value of the radio frequency signal received by the tuner device.

本發明還提供一種調諧器裝置的訊雜比量測方法，調諧器裝置包括訊雜比計算電路。調諧器裝置的訊雜比量測方法包括下列步驟。調諧射頻信號而產生調諧信號。解調調諧信號而產生解調信號。利用調諧器裝置中的訊雜比計算電路依據解調信號與調諧器裝置接收的射頻信號的接收訊號強度指示值產生訊雜比信號。The invention also provides a signal-to-noise ratio measurement method of the tuner device, and the tuner device includes a signal-to-noise ratio calculation circuit. The method for measuring the signal-to-noise ratio of the tuner device includes the following steps. The radio frequency signal is tuned to generate a tuning signal. The tuning signal is demodulated to generate a demodulated signal. The signal-to-noise ratio calculation circuit in the tuner device is used to generate the signal-to-noise ratio signal according to the demodulated signal and the received signal strength indicator value of the radio frequency signal received by the tuner device.

基于上述，本發明實施例藉由在調諧器裝置內部設置訊雜比計算電路，來依據解調信號與調諧器裝置的接收訊號強度指示值產生訊雜比信號，如此可大幅減少外部測試儀器的使用，而直接由調諧器裝置內部設置的訊雜比計算電路來產生訊雜比信號，因此可有效解決外部測試儀器檢測訊雜比效率過低的問題，進而降低調諧器裝置的測試成本。Based on the above, the embodiment of the present invention generates the signal-to-noise ratio signal according to the demodulated signal and the received signal strength indicator value of the tuner device by setting the SNR calculation circuit inside the tuner device, which can greatly reduce the need for external test equipment. The signal-to-noise ratio signal is directly generated by the signal-to-noise ratio calculation circuit provided inside the tuner device, so it can effectively solve the problem of low signal-to-noise ratio detection efficiency of external test instruments, thereby reducing the test cost of the tuner device.

圖1是依照本發明的實施例的一種調諧器裝置的示意圖，請參照圖1。調諧器裝置100可包括調諧器電路102、解調器電路104以及訊雜比計算電路106，其中解調器電路104耦接調諧器電路102與訊雜比計算電路106。調諧器電路102可接收來自訊號源(未繪示)的射頻信號RF1，以調諧射頻信號RF1而產生調諧信號FM1。解調器電路104可解調調諧信號FM1而產生解調信號DM1。訊雜比計算電路106則可依據解調信號DM1與調諧器裝置100接收的射頻信號RF1的接收訊號強度指示(Received Signal-Strength Indicator, RSSI)值R1產生訊雜比信號SNR1，其中接收訊號強度指示值R1代表調諧器裝置由天線端所接收的射頻信號RF1的信號強度。FIG. 1 is a schematic diagram of a tuner device according to an embodiment of the present invention, please refer to FIG. 1 . The tuner device 100 may include a tuner circuit 102 , a demodulator circuit 104 and an SNR calculation circuit 106 , wherein the demodulator circuit 104 is coupled to the tuner circuit 102 and the SNR calculation circuit 106 . The tuner circuit 102 can receive a radio frequency signal RF1 from a signal source (not shown) to tune the radio frequency signal RF1 to generate a tuning signal FM1. The demodulator circuit 104 can demodulate the tuning signal FM1 to generate a demodulated signal DM1. The signal-to-noise ratio calculation circuit 106 can generate the signal-to-noise ratio signal SNR1 according to the received signal strength indicator (Received Signal-Strength Indicator, RSSI) value R1 of the demodulated signal DM1 and the radio frequency signal RF1 received by the tuner device 100, wherein the received signal strength The indicator value R1 represents the signal strength of the radio frequency signal RF1 received by the tuner device from the antenna.

訊雜比計算電路106可透過內部整合電路匯流排(Inter Integrated Circuit bus，I2C bus)輸出訊雜比信號SNR1至調諧器裝置100的外部，例如可輸出至電腦主機，以使電腦主機依據訊雜比信號SNR1判斷調諧器裝置100的良率或靈敏度。如此藉由直接在調諧器裝置100內設置訊雜比計算電路106來計算訊雜比信號SNR1，可大幅減少外部測試儀器的使用，而可有效地提高檢測效率，降低作為調諧器裝置的量產的積體電路的測試成本。The signal-to-noise ratio calculation circuit 106 can output the signal-to-noise ratio signal SNR1 to the outside of the tuner device 100 through the internal integrated circuit bus (Inter Integrated Circuit bus, I2C bus). The ratio signal SNR1 determines the yield or sensitivity of the tuner device 100 . In this way, by directly setting the signal-to-noise ratio calculation circuit 106 in the tuner device 100 to calculate the signal-to-noise ratio signal SNR1, the use of external test instruments can be greatly reduced, and the detection efficiency can be effectively improved, and the mass production of the tuner device can be reduced. The cost of testing integrated circuits.

圖2是依照本發明的實施例的一種訊雜比計算電路的示意圖，請參照圖2。進一步來說，訊雜比計算電路106可如圖2所示，包括雜訊提取電路202、取樣平均電路204、突波抑制電路206以及縮放處理電路208，其中取樣平均電路204耦接雜訊提取電路202與突波抑制電路206，縮放處理電路208耦接突波抑制電路206。雜訊提取電路202可提取解調信號DM1的高頻雜訊信號N1，在部份實施例中，雜訊提取電路202可例如以高通濾波器來實施。取樣平均電路204可對高頻雜訊信號N1進行取樣，而產生雜訊平均信號AN1。在部份實施例中，雜訊平均信號AN1可包括在預設取樣期間內高頻雜訊信號N1的取樣信號的平均值。舉例來說，取樣平均電路204可以預設取樣期間為單位對週期性地對高頻雜訊信號N1進行取樣以產生雜訊平均信號AN1，例如取樣平均電路204可在各個預設取樣期間內對高頻雜訊信號N1進行多次取樣，並計算各個預設取樣期間內的多個取樣信號的平均值，雜訊平均信號AN1可包括多個預設取樣期間所對應的多個取樣信號平均值。FIG. 2 is a schematic diagram of a signal-to-noise ratio calculation circuit according to an embodiment of the present invention, please refer to FIG. 2 . Further, the signal-to-noise ratio calculation circuit 106 can be shown in FIG. 2 , including a noise extraction circuit 202, a sampling average circuit 204, a surge suppression circuit 206, and a scaling processing circuit 208, wherein the sampling average circuit 204 is coupled to the noise extraction circuit. The circuit 202 is coupled to the surge suppression circuit 206 , and the scaling processing circuit 208 is coupled to the surge suppression circuit 206 . The noise extraction circuit 202 can extract the high-frequency noise signal N1 of the demodulated signal DM1 , and in some embodiments, the noise extraction circuit 202 can be implemented, for example, by a high-pass filter. The sampling average circuit 204 can sample the high frequency noise signal N1 to generate a noise average signal AN1. In some embodiments, the average noise signal AN1 may include an average value of the sampled signals of the high frequency noise signal N1 within a predetermined sampling period. For example, the sampling and averaging circuit 204 can periodically sample the high-frequency noise signal N1 to generate the noise averaging signal AN1 in units of preset sampling periods, for example, the sampling and averaging circuit 204 can perform The high-frequency noise signal N1 is sampled multiple times, and the average value of multiple sampled signals in each preset sampling period is calculated, and the noise average signal AN1 can include multiple sampled signal average values corresponding to multiple preset sampling periods .

突波抑制電路206可偵測雜訊平均信號AN1是否包括突波，並抑制包括突波的雜訊平均信號AN1，而輸出突波被抑制後的雜訊平均信號AN2。舉例來說，突波抑制電路206可判斷雜訊平均信號AN1所包括的多個取樣信號平均值是否大於預設值，並將大於預設值的取樣信號平均值剔除(亦即此取樣信號平均值包括突波成分而需被剔除)，而僅將未大於預設值的取樣信號平均值做為雜訊平均信號AN2輸出，以使雜訊平均信號AN2不包括突波。The surge suppressing circuit 206 can detect whether the average noise signal AN1 includes a spike, suppress the average noise signal AN1 including the spike, and output the average noise signal AN2 after the surge is suppressed. For example, the surge suppression circuit 206 can judge whether the average value of the multiple sampled signals included in the average noise signal AN1 is greater than a preset value, and remove the average value of the sampled signal that is larger than the preset value (that is, the average value of the sampled signal The value includes the surge component and needs to be eliminated), and only the average value of the sampled signal that is not greater than the preset value is output as the noise average signal AN2, so that the noise average signal AN2 does not include the surge.

縮放處理電路208可接收突波被抑制後的雜訊平均信號AN2，並依據縮放因子縮放突波抑制電路206輸出的雜訊平均信號AN2，以產生縮放雜訊信號，並依據接收訊號強度指示值R1與縮放雜訊信號產生訊雜比信號SNR1。其中縮放因子的大小可例如對應訊號強度指示值R1調整，亦即對應不同訊號強度指示值R1的範圍，縮放因子可被設計為不同值，以使訊雜比計算電路106可提供更精確的訊雜比信號SNR1。例如當接收訊號強度指示值R1大於門檻值時，縮放因子可設計為第一縮放因子，而當接收訊號強度指示值R1不大於門檻值時，縮放因子可設計為第二縮放因子。在一實施例中，縮放因子與縮放雜訊信號成正相關，第二縮放因子可設計為不同於第一縮放因子，以使當接收訊號強度較低時，仍能產生較精確的訊雜比信號SNR1。The scaling processing circuit 208 can receive the average noise signal AN2 after the surge is suppressed, and scale the average noise signal AN2 output by the surge suppression circuit 206 according to the scaling factor to generate a scaled noise signal, and then scale the average noise signal AN2 according to the received signal strength indicator value R1 and the scaled noise signal generate a signal-to-noise ratio signal SNR1. The size of the scaling factor can be adjusted, for example, corresponding to the signal strength indicator value R1, that is, corresponding to the range of different signal strength indicator values R1, the scaling factor can be designed to different values, so that the signal-to-noise ratio calculation circuit 106 can provide more accurate signals. Noise ratio signal SNR1. For example, when the RSSI value R1 is greater than the threshold value, the scaling factor can be designed as the first scaling factor, and when the RSSI value R1 is not greater than the threshold value, the scaling factor can be configured as the second scaling factor. In one embodiment, the scaling factor is positively correlated with scaling the noise signal, and the second scaling factor can be designed to be different from the first scaling factor, so that when the received signal strength is low, a more accurate signal-to-noise ratio signal can still be generated SNR1.

在部份實施例中，可依據外部測試儀器對調諧器裝置100進行訊雜比量測所得到的訊雜比信號來調整縮放因子，亦即將外部測試儀器對調諧器裝置100進行訊雜比量測所得到的訊雜比信號做為標準值來調整縮放因子，以使訊雜比計算電路106所提供的訊雜比信號SNR1可與外部測試儀器所提供的訊雜比信號具有較接近的值。如此可確保調諧器裝置100的良率檢測準確度接近或不低於使用外部測試儀器進行良率檢測的準確度，且仍能大幅提高檢測效率。In some embodiments, the scaling factor can be adjusted according to the signal-to-noise ratio signal obtained by measuring the signal-to-noise ratio of the tuner device 100 by an external test instrument, that is, the signal-to-noise ratio measurement of the tuner device 100 by an external test instrument The signal-to-noise ratio signal obtained by measuring is used as a standard value to adjust the scaling factor, so that the signal-to-noise ratio signal SNR1 provided by the signal-to-noise ratio calculation circuit 106 can have a value closer to the signal-to-noise ratio signal provided by the external test instrument . This can ensure that the accuracy of the yield detection of the tuner device 100 is close to or not lower than the accuracy of the yield detection using an external test instrument, and the detection efficiency can still be greatly improved.

圖3是依照本發明的實施例的一種調諧器裝置的訊雜比量測方法的流程圖，請參照圖3。由上述實施例可知，調諧器裝置的訊雜比量測方法可至少包括下列步驟。首先，調諧射頻信號而產生調諧信號(步驟S302)。接著，解調調諧信號而產生解調信號(步驟S304)。然後，利用調諧器裝置中的訊雜比計算電路依據解調信號與調諧器裝置接收的射頻信號的接收訊號強度指示值產生訊雜比信號(步驟S306)，其中訊雜比計算電路可透過內部整合電路匯流排輸出訊雜比信號至電腦主機，以使電腦主機依據訊雜比信號判斷調諧器裝置的良率或靈敏度。如此藉由利用在調諧器裝置內設置的訊雜比計算電路來計算訊雜比信號，大幅減少外部測試儀器的使用，而可有效地提高檢測效率，降低作為調諧器裝置的量產的積體電路的測試成本。FIG. 3 is a flow chart of a method for measuring the signal-to-noise ratio of a tuner device according to an embodiment of the present invention. Please refer to FIG. 3 . It can be seen from the above embodiments that the method for measuring the signal-to-noise ratio of the tuner device may at least include the following steps. Firstly, a radio frequency signal is tuned to generate a tuning signal (step S302). Next, demodulate the tuning signal to generate a demodulated signal (step S304). Then, use the signal-to-noise ratio calculation circuit in the tuner device to generate the signal-to-noise ratio signal (step S306) according to the received signal strength indication value of the demodulated signal and the radio frequency signal received by the tuner device (step S306), wherein the signal-to-noise ratio calculation circuit can pass through the internal The integrated circuit bus outputs the signal-to-noise ratio signal to the computer host, so that the computer host judges the yield or sensitivity of the tuner device according to the signal-to-noise ratio signal. In this way, by using the signal-to-noise ratio calculation circuit installed in the tuner device to calculate the signal-to-noise ratio signal, the use of external test equipment can be greatly reduced, and the detection efficiency can be effectively improved, and the mass-produced integrated body of the tuner device can be reduced. Circuit testing costs.

進一步來說，利用訊雜比計算電路計算訊雜比信號的步驟S306可如圖4所示包括步驟S402~S410。首先，在步驟S402中，提取解調信號的高頻雜訊信號，例如可對解調信號進行高通濾波處理，以提取解調信號的高頻雜訊信號。接著，在步驟S404中，取樣高頻雜訊信號而產生雜訊平均信號，雜訊平均信號指示預設取樣期間內高頻雜訊信號的取樣信號的平均值。舉例來說，可以預設取樣期間為單位對週期性地對高頻雜訊信號進行取樣以產生雜訊平均信號，例如可在各個預設取樣期間內對高頻雜訊信號進行多次取樣，並計算各個預設取樣期間內的多個取樣信號的平均值，雜訊平均信號可包括多個預設取樣期間所對應的多個取樣信號平均值。Further, the step S306 of calculating the signal-to-noise ratio signal by using the signal-to-noise ratio calculation circuit may include steps S402˜S410 as shown in FIG. 4 . First, in step S402, the high-frequency noise signal of the demodulated signal is extracted. For example, high-pass filtering may be performed on the demodulated signal to extract the high-frequency noise signal of the demodulated signal. Next, in step S404, the high-frequency noise signal is sampled to generate a noise average signal, and the noise average signal indicates the average value of the sampled signals of the high-frequency noise signal within a preset sampling period. For example, the high-frequency noise signal may be periodically sampled in units of a preset sampling period to generate a noise average signal, for example, the high-frequency noise signal may be sampled multiple times within each preset sampling period, And calculating the average value of multiple sampling signals in each preset sampling period, the noise average signal may include the multiple sampling signal average values corresponding to multiple preset sampling periods.

在步驟S406中，可判斷雜訊平均信號是否包括突波。例如可判斷雜訊平均信號所包括的多個取樣信號平均值是否大於預設值，而將取樣信號平均值是否大於預設值的雜訊平均信號判斷為包括突波。在步驟S408中，可依據縮放因子縮放突波被抑制後的雜訊平均信號，以產生縮放雜訊信號。其中縮放因子的大小可例如依據訊號強度指示值設計，亦即對應不同訊號強度指示值，縮放因子可被設計為不同值，以使訊雜比計算電路可提供更精確的訊雜比信號。例如當接收訊號強度指示值大於門檻值時，縮放因子可設計為第一縮放因子，而當接收訊號強度指示值不大於門檻值時，縮放因子可設計為第二縮放因子。最後，在步驟S410中，可依據接收訊號強度指示值與縮放雜訊信號產生訊雜比信號。在部份實施例中，可依據外部測試儀器對調諧器裝置進行訊雜比量測所得到的訊雜比信號來設計縮放因子，以使訊雜比計算電路所提供的訊雜比信號可與外部測試儀器所提供的訊雜比信號具有較接近的值。進而確保調諧器裝置的良率檢測準確度接近或不低於使用外部測試儀器進行良率檢測的準確度，且仍能大幅提高檢測效率。In step S406, it may be determined whether the noise average signal includes a surge. For example, it can be determined whether the average value of a plurality of sampled signals included in the noise average signal is greater than a preset value, and the noise average signal whether the average value of the sampled signals is greater than a preset value is determined to include a spike. In step S408 , the average noise signal after the spur is suppressed may be scaled according to a scaling factor to generate a scaled noise signal. The size of the scaling factor can be designed according to the signal strength indication value, that is, corresponding to different signal strength indication values, the scaling factor can be designed as different values, so that the signal-to-noise ratio calculation circuit can provide a more accurate signal-to-noise ratio signal. For example, when the RSSI value is greater than the threshold value, the scaling factor can be designed as the first scaling factor, and when the RSSI value is not greater than the threshold value, the scaling factor can be designed as the second scaling factor. Finally, in step S410, a signal-to-noise ratio signal can be generated according to the received signal strength indicator value and the scaled noise signal. In some embodiments, the scaling factor can be designed according to the signal-to-noise ratio signal obtained by measuring the signal-to-noise ratio of the tuner device by an external test instrument, so that the signal-to-noise ratio signal provided by the signal-to-noise ratio calculation circuit can be compared with The signal-to-noise ratio signal provided by the external test instrument has a closer value. Thus, it can be ensured that the accuracy of the yield detection of the tuner device is close to or not lower than the accuracy of the yield detection using an external test instrument, and the detection efficiency can still be greatly improved.

綜上所述，本發明實施例藉由在調諧器裝置內部設置訊雜比計算電路，來依據解調信號與調諧器裝置的接收訊號強度指示值產生訊雜比信號，如此可大幅減少外部測試儀器的使用，而直接由調諧器裝置內部設置的訊雜比計算電路來產生訊雜比信號，因此可有效解決外部測試儀器檢測效率過低的問題，進而降低調諧器裝置的測試成本。To sum up, the embodiment of the present invention generates an SNR signal based on the demodulated signal and the received signal strength indication value of the tuner device by setting the SNR calculation circuit inside the tuner device, which can greatly reduce external testing The signal-to-noise ratio signal is directly generated by the signal-to-noise ratio calculation circuit inside the tuner device, so it can effectively solve the problem of low detection efficiency of the external test instrument, thereby reducing the test cost of the tuner device.

100:調諧器裝置 102:調諧器電路 104:解調器電路 106:訊雜比計算電路 202:雜訊提取電路 204:取樣平均電路 206:突波抑制電路 208:縮放處理電路 RF1:射頻信號 FM1:調諧信號 DM1:解調信號 R1:接收訊號強度指示值 SNR1:訊雜比信號 N1:高頻雜訊信號 AN1、AN2:雜訊平均信號 S302~S306:調諧器裝置的訊雜比量測方法的步驟 S402~S410:利用訊雜比計算電路計算訊雜比信號的步驟100: Tuner device 102: Tuner circuit 104: Demodulator circuit 106: Signal-to-noise ratio calculation circuit 202: noise extraction circuit 204: Sampling average circuit 206: Surge suppression circuit 208: scaling processing circuit RF1: radio frequency signal FM1: tuning signal DM1: demodulation signal R1: Received signal strength indicator value SNR1: signal-to-noise ratio signal N1: High frequency noise signal AN1, AN2: noise average signal S302~S306: Steps of the method for measuring the signal-to-noise ratio of the tuner device S402~S410: Steps of calculating the signal-to-noise ratio signal by using the signal-to-noise ratio calculation circuit

圖1是依照本發明的實施例的調諧器裝置的示意圖。 圖2是依照本發明的實施例的一種訊雜比計算電路的示意圖。 圖3是依照本發明的實施例的一種調諧器裝置的訊雜比量測方法的流程圖。 圖4是依照本發明的實施例的一種，利用訊雜比計算電路計算訊雜比信號的流程圖。FIG. 1 is a schematic diagram of a tuner device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a signal-to-noise ratio calculation circuit according to an embodiment of the present invention. FIG. 3 is a flow chart of a method for measuring the signal-to-noise ratio of a tuner device according to an embodiment of the present invention. FIG. 4 is a flow chart of calculating the signal-to-noise ratio signal by using the signal-to-noise ratio calculation circuit according to an embodiment of the present invention.

100:調諧器裝置100: Tuner device

102:調諧器電路102: Tuner circuit

104:解調器電路104: Demodulator circuit

106:訊雜比計算電路106: Signal-to-noise ratio calculation circuit

RF1:射頻信號RF1: radio frequency signal

FM1:調諧信號FM1: tuning signal

DM1:解調信號DM1: demodulation signal

R1:接收訊號強度指示值R1: Received signal strength indicator value

SNR1:訊雜比信號SNR1: signal-to-noise ratio signal

Claims (10)

一種調諧器裝置，包括：一調諧器電路，用以調諧一射頻信號而產生一調諧信號；一解調器電路，耦接該調諧器電路，用以解調該調諧信號而產生一解調信號；以及一訊雜比計算電路，耦接該調諧器電路，用以依據該解調信號與該調諧器裝置接收的該射頻信號的一接收訊號強度指示值產生一訊雜比信號，該訊雜比計算電路包括：一雜訊提取電路，耦接該解調器電路，用以提取該解調信號的一高頻雜訊信號；一取樣平均電路，耦接該雜訊提取電路，用以取樣該高頻雜訊信號而產生一雜訊平均信號，該雜訊平均信號指示一預設取樣期間內該高頻雜訊信號的取樣信號的平均值；一突波抑制電路，耦接該取樣平均電路，用以偵測該雜訊平均信號是否包括突波，以及當判斷該雜訊平均信號包括該突波時抑制包括該突波的雜訊平均信號，而輸出該突波被抑制後的雜訊平均信號；以及一縮放處理電路，耦接該突波偵測電路，依據一縮放因子縮放該突波抑制電路輸出的雜訊平均信號，以產生一縮放雜訊信號，依據該接收訊號強度指示值與該縮放雜訊信號產生該訊雜比信號。 A tuner device, comprising: a tuner circuit, used to tune a radio frequency signal to generate a tuned signal; a demodulator circuit, coupled to the tuner circuit, used to demodulate the tuned signal to generate a demodulated signal and a signal-to-noise ratio calculation circuit coupled to the tuner circuit for generating a signal-to-noise ratio signal based on the demodulated signal and a received signal strength indicator value of the radio frequency signal received by the tuner device, the signal-to-noise ratio signal The ratio calculation circuit includes: a noise extraction circuit coupled to the demodulator circuit for extracting a high-frequency noise signal of the demodulated signal; a sampling average circuit coupled to the noise extraction circuit for sampling The high-frequency noise signal generates a noise average signal, and the noise average signal indicates the average value of the sampling signal of the high-frequency noise signal within a preset sampling period; a surge suppression circuit is coupled to the sampling average A circuit for detecting whether the noise average signal includes a surge, and suppressing the noise average signal including the spike when it is judged that the noise average signal includes the spike, and outputting the noise after the surge is suppressed signal average signal; and a scaling processing circuit coupled to the surge detection circuit, scaling the noise average signal output by the surge suppression circuit according to a scaling factor to generate a scaled noise signal, according to the received signal strength indication value and the scaled noise signal to generate the signal-to-noise ratio signal. 如請求項1所述的調諧器裝置，其中當該接收訊號強度指示值大於一門檻值時，該縮放因子為一第一縮放因子；當該接收訊號強度指示值不大於一門檻值時，該縮放因子為一第二縮放因子，且該第一縮放因子與該第二縮放因子不同。 The tuner device as claimed in claim 1, wherein when the received signal strength indicator value is greater than a threshold value, the scaling factor is a first scaling factor; when the received signal strength indicator value is not greater than a threshold value, the The scaling factor is a second scaling factor, and the first scaling factor is different from the second scaling factor. 如請求項1所述的調諧器裝置，其中該突波抑制電路用以於該預設取樣期間內該高頻雜訊信號的取樣信號的平均值大於一預設值時，判斷該雜訊平均信號包括該突波。 The tuner device as claimed in claim 1, wherein the surge suppression circuit is used to determine the average value of the noise when the average value of the sampled signal of the high-frequency noise signal within the preset sampling period The signal includes the burst. 如請求項1所述的調諧器裝置，其中該雜訊提取電路為高通濾波電路。 The tuner device according to claim 1, wherein the noise extraction circuit is a high-pass filter circuit. 如請求項1所述的調諧器裝置，其中該訊雜比計算電路透過內部整合電路匯流排輸出該訊雜比信號至該調諧器裝置的外部。 The tuner device as claimed in claim 1, wherein the signal-to-noise ratio calculation circuit outputs the signal-to-noise ratio signal to the outside of the tuner device through an internal integrated circuit bus. 一種調諧器裝置的訊雜比量測方法，該調諧器裝置包括一訊雜比計算電路，該調諧器裝置的訊雜比量測方法包括：調諧一射頻信號而產生一調諧信號；解調該調諧信號而產生一解調信號；以及利用該調諧器裝置中的該訊雜比計算電路依據該解調信號與該調諧器裝置接收的該射頻信號的一接收訊號強度指示值產生一訊雜比信號，該調諧器裝置的訊雜比量測方法更包括：利用該訊雜比計算電路提取該解調信號的一高頻雜訊信號；取樣該高頻雜訊信號而產生一雜訊平均信號，該雜訊平均信號指示一預設取樣期間內該高頻雜訊信號的取樣信號的平均值； 判斷該雜訊平均信號是否包括突波；依據一縮放因子縮放該突波被抑制後的雜訊平均信號，以產生一縮放雜訊信號；以及依據該接收訊號強度指示值與該縮放雜訊信號產生該訊雜比信號。 A method for measuring the signal-to-noise ratio of a tuner device. The tuner device includes a signal-to-noise ratio calculation circuit. The method for measuring the signal-to-noise ratio of the tuner device includes: tuning a radio frequency signal to generate a tuning signal; demodulating the generating a demodulated signal by tuning the signal; and generating a signal-to-noise ratio based on the demodulated signal and a received signal strength indicator value of the radio frequency signal received by the tuner device by using the signal-to-noise ratio calculation circuit in the tuner device signal, the signal-to-noise ratio measurement method of the tuner device further includes: using the signal-to-noise ratio calculation circuit to extract a high-frequency noise signal of the demodulated signal; sampling the high-frequency noise signal to generate a noise average signal , the noise average signal indicates the average value of the sampling signal of the high frequency noise signal within a preset sampling period; judging whether the noise average signal includes a spike; scaling the noise average signal after the spike is suppressed according to a scaling factor to generate a scaled noise signal; and according to the received signal strength indicator and the scaled noise signal The signal-to-noise ratio signal is generated. 如請求項6所述的調諧器裝置的訊雜比量測方法，其中當該接收訊號強度指示值大於一門檻值時，該縮放因子為一第一縮放因子；當該接收訊號強度指示值不大於一門檻值時，該縮放因子為一第二縮放因子，且該第一縮放因子與該第二縮放因子不同。 The signal-to-noise ratio measurement method of a tuner device as described in claim 6, wherein when the received signal strength indicator value is greater than a threshold value, the scaling factor is a first scaling factor; when the received signal strength indicator value is not When greater than a threshold value, the scaling factor is a second scaling factor, and the first scaling factor is different from the second scaling factor. 如請求項6所述的調諧器裝置的訊雜比量測方法，其中該突波抑制電路於該預設取樣期間內該高頻雜訊信號的取樣信號的平均值大於一預設值時，判斷該雜訊平均信號包括該突波。 The method for measuring the signal-to-noise ratio of the tuner device as described in claim 6, wherein the surge suppression circuit, when the average value of the sampled signal of the high-frequency noise signal within the preset sampling period is greater than a preset value, It is judged that the noise average signal includes the surge. 如請求項6所述的調諧器裝置的訊雜比量測方法，其中提取該解調信號的該高頻雜訊信號的步驟包括：對該解調信號進行高通濾波處理。 The method for measuring the signal-to-noise ratio of a tuner device according to claim 6, wherein the step of extracting the high-frequency noise signal of the demodulated signal includes: performing high-pass filtering on the demodulated signal. 如請求項6所述的調諧器裝置的訊雜比量測方法，其中該訊雜比計算電路透過內部整合電路匯流排輸出該訊雜比信號。 The method for measuring the signal-to-noise ratio of a tuner device as described in claim 6, wherein the signal-to-noise ratio calculation circuit outputs the signal-to-noise ratio signal through an internal integrated circuit bus.
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US20020036713A1 (en) * 1998-02-10 2002-03-28 Wavetek Coporation Noise measurement system
TW200620875A (en) * 2004-12-15 2006-06-16 Mediatek Inc Impluse supression apparatus of OFDM system and impluse supression method thereof
WO2009075780A1 (en) * 2007-12-07 2009-06-18 Thomson Licensing Satellite receiver software algorithm for setting an input attenuator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020036713A1 (en) * 1998-02-10 2002-03-28 Wavetek Coporation Noise measurement system
TW200620875A (en) * 2004-12-15 2006-06-16 Mediatek Inc Impluse supression apparatus of OFDM system and impluse supression method thereof
WO2009075780A1 (en) * 2007-12-07 2009-06-18 Thomson Licensing Satellite receiver software algorithm for setting an input attenuator

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