201001935 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種中頻訊號損耗補償電路，特別係關 於一種在通信系統的室外單元中對中頻訊號損耗進行補償 的電路。 【先前技術】 請參閱圖1及圖2，現有的通信系統包括室外單元 20及室内單元6〇，兩者之間藉由電纜4〇連接，室外單 兀20還與天線1〇相連，電纜4〇用於在室内單元6〇及 至外單兀20之間傳輸中頻訊號、控制訊號及提供電源。 通信系統來說，該室外單元2〇的收發中頻訊號的性 月b才曰‘直接影響到通信系統的靈敏度，因此室外單元2〇 中負責收發中頻訊號電路的重要性是顯而易見的。 該室外單元20的收發中頻訊號電路包括中頻分離器 、傳送放大器24、升頻器22、降頻器％及接收放大 器28，當室内單元60從室外單元2〇接收訊號時，天線 1 〇接收的射頻訊號被送至降頻器2 6降為中頻訊號，此中 =號經接收放大器28進行放大後，送至中頻分離器3〇 〜冰^到至内單兀6〇。反之，當室内單元60傳送訊號給 早凡2〇 _ ’室内單元6〇發送的中頻訊號藉由中頻 刀一30送至傳送放大器24進行中頻訊號放大，最後 ::頻器22轉換為射頻訊號輸出至天線1〇。在此通信系 =中+中頻訊號在電缓40或其他負載傳輸過程中會損 頻訊號隨之衰減，並且對衰減的中頻訊號進行放 ^放大g 24及接收放大器28為固定增益放大 7 201001935 器’只能對令頻 令頻訊號的損耗，無。法=固疋增益放大，不能即時檢測 變增益補償。 對中頻戒號的損耗大小進行可 f發明内容】 寥於以上内容，古、 電路’能即時檢測中頻-種"員訊號損耗補償 損耗大小進行可變增益補償Ϊ耗’並針料頻訊號的 一種中頻訊號損耗補償 < 單元中，其包括傳 路，权在通信系統的室外 電纜向室外單元傳送後已損耗的中單元經 號與預先存儲的中^號= = = =到的中頻訊 大小，進而根據損耗大小控；中頻訊號損耗 進行可變增益補償，該控制電：還二路：：中頻訊號 該接收電路中傳輸的中頻訊號進行可變增貝益補償i、。預先對 δ亥中頻訊號損耗補償電路藉由詨拾 貝 中頻訊號的損耗，# ώ _^曰δχ ，、彳電路即時檢測 耗大小控制該傳送電路及接收電路，實=了』=的； 的可變增益補償。 了對中頻讯號 【實施方式】 請參閱圖3,本發明中頻訊號損 土統的室外單元中，其較佳實施方式包括;送電:= 仏測電路200、接收電路3〇〇、時鐘 則、中頻分離器_及雙工器8〇。電路伽、控制電路 201001935 傳送電路100包括傳送功率放大器TAl、TA2、TA3、 TA4，濾波器BPF1、BPF5，混頻器Mixl及衰減器102。 檢測電路200包括兩功率檢測器204、202。接收電路300 包括接收功率放大器RA1、RA2、RA3，濾波器BPF2、 BPF6，混頻器Mix2及衰減器302。時鐘電路400包括濾 波器BPF3、衰減器404及時鐘分配器402。控制電路500 包括多工器502，類比/數位轉換器504，控制器506，數 據機508，濾波器BPF4、衰減器510，合成器512及振盪 器 OSC1、OSC2。 雙工器80的第一端與通信系統的天線90相連，第 二端依次藉由傳送電路100中的傳送功率放大器TA4、 TA3、TA2，濾波器BPF5，混頻器Mixl，傳送功率放大 器TA1，濾波器BPF1及衰減器102與中頻分離器600相 連，雙工器80的第三端依次藉由接收電路300中的接收 功率放大器RA1、濾波器BPF6、接收功率放大器RA2、 混頻器Mix2、接收功率放大器RA3、濾波器BPF2及衰 L 減器302與中頻分離器600相連，時鐘電路400中的時 鐘分配器402依次藉由濾波器BPF3及衰減器404與中頻 分離器600相連，控制電路500中的多工器502依次藉 由類比/數位轉換器504、控制器506、數據機508、濾波 器BPF4及衰減器510與中頻分離器600相連，多工器502 還與控制器506相連，控制器506還分別與傳送功率放 大器TA1、接收功率放大器RA3及合成器512相連，數 據機508還與時鐘分配器402相連，振盪器OSC1的一端 與混頻器Mixl相連，另一端藉由合成器512與時鐘分配 9 201001935 器.4〇2相連，合成器512還藉由振1器OSC2與混頻器 =1x2相連，檢測電路2〇〇中的功率檢測器綱的一端 ^於夕工g 5G2’另-端連接於傳送功率放大器tai及淚 波^ Bm之間的節點，功率檢測器观的—端連接於^ 502,另-端接收耗合器（圖未示）從傳送功率 器TA=輸出端耦合的射頻訊號。 哭j室内單元_向室外單元傳送訊號時，中頻分離 :”將《室内I元侧接收的中頻訊號分離出來，經 '、器102將此中頻訊號強度與傳送電路1〇〇進行匹 酉1,1渡波器BPF1渡除此中頻訊號以外的其他訊號，傳送 :二大器TA1對此中頻訊號進行放大，混頻器跑將 號號升頻為射頻訊號，濾、波器卿5滤除此射頻訊 號之外的雜頻訊號，然後經傳送功率放大器TA2、TA3、 TA4對射頻訊號進行功率放大傳送給雙工器肋， 8〇識=出將要傳送的射頻訊號，傳至天線90。 口 經天m單元700從室外單元接收訊號時，射頻訊號 射=雙工器8〇,雙工器8〇識別出將要傳送的 、 娩，送至接收電路3〇〇中的接收功率放大器RA1、 ί行射頻訊號放大’濾波器B P F 6濾除此射頻訊號之 〜、頻訊號，混頻器Mix2將此射頻訊號降為中頻訊 頻訊號經接收放大器RA3進行放大，渡波器卿2 應除此中頻訊號之外的其他訊號，經衰減器3〇2將此中 ::纸唬強度與中頻分離胃_進行匹配並送至中頻分離 中頻分離器刪將需傳至室内單元的中頻訊 Α刀離出來，再傳送到室内單元700。 201001935 ^由於訊號在各器件之間傳輸過程中會損耗，訊號會 隨之衰減，尤其中頻訊號在室内單元700和室外單元"之 間的電财傳輪的損耗尤為嚴重。檢測電路200可即時 檢測中頻说號的損耗，再藉由控制電路5〇〇根 却 號的損耗大小控制傳送電路1〇〇及接收電路3〇〇，掛 t頻訊號的可變增益補償。其具體工作過程為：檢測電 路200的功率檢測器2〇4即時檢測濾波器Βρρι輪出 til度，並將此中頻訊號傳送至控制電路5〇〇中的 夕σ 2，再送至類比/數位轉換器5〇4將此中頻 轉換成數位訊號後送至控制器鄉，控制器506 =天線60及室内單元7〇〇需接收的訊號功率大小，控制 器506對接收到的中頻數位訊號與預先存 = =而控制傳送功率放大器TA1的放大倍 = 功率放大器TA1根據中頻訊號的損耗大小對令頻 仃了可變增益放大，這樣在傳送電路100中實現了中υ 耗：第一次可變增益補償，即補償訊號從室内ΐ 兀700、經電缓向室外單元傳輸時的祕。 内早 另外，由於中頻訊號的損耗主要是在 中的損耗，因此中頻訊號從室外單元 :元:〇°時其增益放大率等於中頻訊號從室A;: 還可根據接收到的中頻:位::::接 接收功率放大器_可預先根據，二= 小對中頻訊號進行可變增益放大 ° ^貝耗大 傳輪认宕向留；* 传'中頻訊號經電纜 傳輸、〜至内皁兀700時的損耗與增益值相同，這樣^ 11 201001935 收電路300中也實現了對 益補償。 现損耗的第一次可變增 同時’檢測電路2⑽的功率檢測器2〇 =從傳送功率放大器TA4輸出端轉合的射二 f ^至控制電路500中的多工器地，再藉由類比= ，轉換器⑽將此射頻訊號轉換成數位訊號後送 态5(^’控制器506控制傳送功率放大器及接收^ 放大器RA3的中頻訊號對其㈣進行增益放大率調整’，、 實現中頻訊號損耗的第二次可變增益補償。此外 訊號損耗補償電路的整個訊號傳輸過程中，控制電路5卯 t的濾波器BPF4與衰減器51〇分別起濾波和進行傳輪匹 配作用’合成器512用以接收不同頻率的訊號，並分別 藉由振盪器OSC1及〇SC2進行電平轉換後送至混頻器 Mixl及Mix2。時鐘電路400中的時鐘分配器4〇2負責; 理分配訊號傳輸的時鐘，濾波器BPF3濾除時鐘訊號之夕口卜 的其他訊號，衰減器404將此時鐘訊號與時鐘電路4〇〇 進行匹配。 綜上所述’本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士’在爰依本發明精神所作之等效修飾 或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係現有通信系統的示意圖。 圖2係圖1中室外單元的收發中頻訊號電路的原理 圖。 12 201001935 ‘ 圖3係本發明中頻訊號損耗補償電路的較佳實施方式 的原理圖。 【主要元件符號說明】 雙工器 80 天線 90 傳送電路 100 檢測電路 200 功率檢測器 202、 204 衰減器 102、 302、404、510 接收電路 300 時鐘電路 400 時鐘分配器 402 控制電路 500 多工器 502 類比/數位轉換器504 控制器 506 數據機 508 合成器 512 中頻分離器 600 室内單元 700 接收功率放大器 RA1、 RA2、RA3 混頻器 Mixl 、Mix2傳送功率放大器 TA1-TA4 濾、波器 BPF1-BPF6振盪器 OSC1 、OSC2 13BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate frequency signal loss compensation circuit, and more particularly to a circuit for compensating for intermediate frequency signal loss in an outdoor unit of a communication system. [Prior Art] Referring to FIG. 1 and FIG. 2, the existing communication system includes an outdoor unit 20 and an indoor unit 6〇, which are connected by a cable 4〇, and the outdoor unit 20 is also connected to the antenna 1〇, and the cable 4 〇 It is used to transmit intermediate frequency signals, control signals and power supply between the indoor unit 6〇 and the external unit 20. In the communication system, the importance of the IF signal transmitted and received by the outdoor unit 2 曰 directly affects the sensitivity of the communication system, so the importance of the IF signal in the outdoor unit 2 是 is obvious. The transceiver intermediate frequency signal circuit of the outdoor unit 20 includes an intermediate frequency separator, a transmission amplifier 24, an upconverter 22, a downconverter %, and a receiving amplifier 28. When the indoor unit 60 receives a signal from the outdoor unit 2, the antenna 1 The received RF signal is sent to the down-converter 26 to be reduced to an intermediate frequency signal, and the medium== is amplified by the receiving amplifier 28, and then sent to the intermediate frequency separator 3〇~冰^ to the internal unit 6〇. On the other hand, when the indoor unit 60 transmits a signal to the IF _ ' indoor unit 6 〇, the IF signal is sent to the transmission amplifier 24 for intermediate frequency signal amplification by the intermediate frequency knife -30, and finally: the frequency converter 22 is converted to The RF signal is output to the antenna 1〇. In this communication system = medium + intermediate frequency signal, the loss signal will be attenuated during the transmission or other load transmission, and the attenuated intermediate frequency signal is amplified and amplified by g 24 and the receiving amplifier 28 is fixed gain amplification 7 201001935 'only can be used to reduce the frequency of the frequency signal, no. Method = solid gain amplification, variable gain compensation cannot be detected immediately. The content of the loss of the IF ring can be f content] In the above content, the ancient, circuit 'can immediately detect the IF-species' quotation signal loss compensation loss size for variable gain compensation '" and pin frequency An intermediate frequency signal loss compensation < unit of the signal includes a path, the weight of the medium unit number that has been lost after the outdoor cable of the communication system is transmitted to the outdoor unit, and the pre-stored medium number ==== Medium frequency signal size, and then according to the loss size control; IF signal loss for variable gain compensation, the control power: also two ways:: IF signal The IF signal transmitted in the receiving circuit is variable to increase the benefit compensation i ,. In advance, the δ Hz IF signal loss compensation circuit controls the transmission circuit and the receiving circuit by controlling the loss of the IF signal, # ώ _ 曰 曰 χ , , , , , , , , , , , , , , , , , , , , , , , Variable gain compensation. For the IF signal [Embodiment] Please refer to FIG. 3, in the outdoor unit of the IF signal damage system of the present invention, the preferred embodiment includes: power transmission: = detection circuit 200, receiving circuit 3 〇〇, clock Then, the intermediate frequency separator _ and the duplexer 8 〇. Circuit Gamma, Control Circuit 201001935 The transmission circuit 100 includes transmission power amplifiers TA1, TA2, TA3, TA4, filters BPF1, BPF5, a mixer Mix1 and an attenuator 102. Detection circuit 200 includes two power detectors 204, 202. The receiving circuit 300 includes receiving power amplifiers RA1, RA2, RA3, filters BPF2, BPF6, a mixer Mix2, and an attenuator 302. The clock circuit 400 includes a filter BPF3, an attenuator 404, and a clock distributor 402. Control circuit 500 includes multiplexer 502, analog/digital converter 504, controller 506, data processor 508, filter BPF 4, attenuator 510, synthesizer 512, and oscillators OSC1, OSC2. The first end of the duplexer 80 is connected to the antenna 90 of the communication system, and the second end is sequentially transmitted by the transmission power amplifiers TA4, TA3, TA2, the filter BPF5, the mixer Mix1, and the power amplifier TA1 in the transmission circuit 100, The filter BPF1 and the attenuator 102 are connected to the intermediate frequency separator 600. The third end of the duplexer 80 is sequentially received by the receiving power amplifier RA1, the filter BPF6, the receiving power amplifier RA2, and the mixer Mix2 in the receiving circuit 300. The receive power amplifier RA3, the filter BPF2, and the faucet reducer 302 are connected to the intermediate frequency splitter 600. The clock distributor 402 in the clock circuit 400 is sequentially connected to the intermediate frequency splitter 600 by the filter BPF3 and the attenuator 404. The multiplexer 502 in the circuit 500 is sequentially connected to the intermediate frequency separator 600 by an analog/digital converter 504, a controller 506, a data machine 508, a filter BPF4, and an attenuator 510. The multiplexer 502 is also coupled to the controller 506. Connected, the controller 506 is also connected to the transmit power amplifier TA1, the receive power amplifier RA3 and the synthesizer 512, respectively, the data machine 508 is also connected to the clock distributor 402, and one end of the oscillator OSC1 is connected to the mixer Mix1. The other end is connected to the clock distribution 9 201001935 .4〇2 by the synthesizer 512. The synthesizer 512 is also connected to the mixer 1x2 by the oscillator 1 OSC2, and detects the end of the power detector in the circuit 2〇〇. ^于夕工g 5G2' is connected to the node between the transmission power amplifier tai and the tear wave ^ Bm, the power detector is connected to the ^ 502, and the other end is connected to the consumable (not shown) The RF signal coupled from the transmit power TA=output. Cry j indoor unit _ when transmitting signals to the outdoor unit, the intermediate frequency is separated: "Separate the IF signal received by the indoor I-side, and the device 102 compares the intensity of the IF signal with the transmission circuit.酉1,1 ferrite BPF1 removes the signal other than the IF signal, and transmits: the second unit TA1 amplifies the IF signal, and the mixer runs up the number to the RF signal, filter, wave device 5 filtering out the noise signal other than the RF signal, and then transmitting and amplifying the RF signal to the duplexer rib via the transmission power amplifiers TA2, TA3, and TA4, 8 = = outputting the RF signal to be transmitted to the antenna 90. When the mouth unit m unit 700 receives a signal from the outdoor unit, the radio frequency signal = duplexer 8 〇, the duplexer 8 〇 identifies the receiving power amplifier to be delivered, delivered, and sent to the receiving circuit 3〇〇 RA1, ί line RF signal amplification 'Filter BPF 6 filter out the RF signal ~, frequency signal, mixer Mix2 to reduce the RF signal to the intermediate frequency signal through the receiving amplifier RA3 to amplify, the wave device 2 should Other than this IF signal No., through the attenuator 3〇2, the middle:: the paper pulp strength is separated from the intermediate frequency and the stomach is matched and sent to the intermediate frequency separation intermediate frequency separator to delete the intermediate frequency signal that needs to be transmitted to the indoor unit. Then, it is transmitted to the indoor unit 700. 201001935 ^Because the signal will be lost during transmission between the devices, the signal will be attenuated, especially the loss of the intermediate frequency signal between the indoor unit 700 and the outdoor unit " Especially the detection circuit 200 can detect the loss of the IF number in real time, and then control the transmission circuit 1 〇〇 and the receiving circuit 3 藉 by the loss of the control circuit 5 to hang the t-signal variable Gain compensation, the specific working process is: the power detector 2〇4 of the detecting circuit 200 detects the filter Βρρι in turn, and transmits the intermediate frequency signal to the σσ 2 in the control circuit 5〇〇, and then sends it to The analog/digital converter 5〇4 converts the intermediate frequency into a digital signal and sends it to the controller town. The controller 506=the antenna 60 and the indoor unit 7 do not need to receive the signal power, and the controller 506 receives the received signal. Frequency bit signal and advance Store == and control the amplification of the transmission power amplifier TA1 = The power amplifier TA1 modulates the variable frequency by the variable frequency according to the loss of the intermediate frequency signal, so that the transmission is realized in the transmission circuit 100: the first variable Gain compensation, that is, the secret of the compensation signal from the indoor ΐ 、 700, the power transmission to the outdoor unit. In addition, since the loss of the IF signal is mainly in the loss, the IF signal from the outdoor unit: Yuan: 〇°, its gain amplification is equal to the IF signal from room A;: It can also be based on the received intermediate frequency: bit:::: connected to the receiving power amplifier _ can be based on pre-adjusted, two = small IF signal variable gain Zoom in ° ^ Bay consumes a large transfer wheel to confirm the stay; * Pass 'intermediate frequency signal through cable transmission, ~ to the internal saponin 700 when the loss and gain value are the same, so ^ 11 201001935 receive circuit 300 also realized the benefits make up. The first variable increase of the current loss simultaneous 'detection circuit 2 (10) power detector 2 〇 = from the output of the transmission power amplifier TA4 to the multiplexer f ^ to the multiplexer in the control circuit 500, and then by analogy = , the converter (10) converts the RF signal into a digital signal and sends the signal to the state 5 (the controller 506 controls the transmission power amplifier and the intermediate frequency signal of the receiving amplifier A3) to perform (0.4) gain amplification adjustment, and realizes the intermediate frequency The second variable gain compensation of the signal loss. In addition, during the entire signal transmission process of the signal loss compensation circuit, the filter BPF4 of the control circuit 5卯t and the attenuator 51〇 respectively filter and perform the matching function of the combiner 512. The signals for receiving different frequencies are level-converted by the oscillators OSC1 and 〇SC2, respectively, and sent to the mixers Mix1 and Mix2. The clock distributor 4〇2 in the clock circuit 400 is responsible for allocating the signal transmission. The clock, the filter BPF3 filters out other signals of the clock signal, and the attenuator 404 matches the clock signal with the clock circuit 4. In summary, the invention conforms to the invention patent requirement. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Figure 1 is a schematic diagram of a conventional communication system. Figure 2 is a schematic diagram of the IF signal circuit of the outdoor unit of Figure 1. 12 201001935 ' Figure 3 is the IF signal loss of the present invention. Schematic diagram of a preferred embodiment of the compensation circuit. [Main component symbol description] Duplexer 80 Antenna 90 Transmission circuit 100 Detection circuit 200 Power detector 202, 204 Attenuator 102, 302, 404, 510 Receive circuit 300 Clock circuit 400 Clock Distributor 402 Control Circuit 500 Multiplexer 502 Analog/Digital Converter 504 Controller 506 Data Machine 508 Synthesizer 512 IF Splitter 600 Indoor Unit 700 Receive Power Amplifier RA1, RA2, RA3 Mixer Mix1, Mix2 Transmit Power Amplifier TA1-TA4 Filter, Wave BPF1-BPF6 Oscillator OSC1, OSC2 13