什么是fsk調(diào)制? fsk調(diào)制是什么意思？

什么是fsk調(diào)制?? fsk調(diào)制是什么意思？

數(shù)字調(diào)頻又稱移頻鍵控，簡記為FSK，它是載波頻率隨數(shù)字信號而變化的一種調(diào)制方式。利用基帶數(shù)字信號離散取值特點去鍵控載波頻率以傳遞信息的一種數(shù)字調(diào)制技術(shù)。除具有兩個符號的二進制頻移鍵控之外，尚有代表多個符號的多進制頻移鍵控，簡稱多頻調(diào)制。一種用多個載波頻率承載數(shù)字信息的調(diào)制類型。最常見的是用兩個頻率承載二進制1和0的雙頻FSK系統(tǒng)。

FSK （頻移鍵控） ，也稱為移頻調(diào)制和移頻信號。 Frequency Shift Keying is a data signal converted into a specific frequency or tone in order to transmit it over wire, cable, optical fiber or wireless media to a destination point.頻移鍵控是一個數(shù)據(jù)信號轉(zhuǎn)換成特定頻率或音調(diào)，以便將其轉(zhuǎn)交超過電線，電纜，光纖或無線媒介，以一個目的地一點。 The history of FSK dates back to the early 1900s, when this technique was discovered and then used to work alongside teleprinters to transmit messages by radio (RTTY).歷史上的FSK可以追溯到20世紀初葉，當這一技術(shù)被發(fā)現(xiàn)，然后用并肩工作， teleprinters傳遞信息，由電臺（ rtty ） 。 But FSK, with some modifications, is still effective in many instances including the digital world where it is commonly used in conjunction with computers and low speed modems.但在FSK ，作出一些修改，但仍然有效，在許多事例中，包括數(shù)位世界中，這是常用的結(jié)合電腦和低速調(diào)制解調(diào)器。 In fact, the contributions of FSK are much more far reaching.事實上，在捐款的FSK更為深遠。 For example, the principle of FSK has laid the path to the development of other similar techniques such as the Audio Frequency Shift Keying (AFSK) and Multiple Frequency Shift Keying (MFSK) just to name a few.舉例來說，原則上的FSK奠定了發(fā)展的路徑其他類似技術(shù)，如聲頻移鍵控（ afsk ）及多頻移鍵控（多進制頻移鍵控）剛剛僅舉幾例。
In Frequency Shift Keying, the modulating signals shift the output frequency between predetermined levels.在頻移鍵控，調(diào)制信號轉(zhuǎn)移輸出頻率之間預(yù)定的水平。 Technically FSK has two classifications, the non-coherent and coherent FSK.技術(shù)上的FSK有兩個分類，非相干和相干的FSK 。 In non-coherent FSK, the instantaneous frequency is shifted between two discrete values named mark and space frequency, respectively.在非相干的FSK ，瞬時頻率是轉(zhuǎn)移雙方離散值命名為馬克和空間頻率，分別為。 On the other hand, in coherent Frequency Shift Keying or binary FSK, there is no phase discontinuity in the output signal.在另一方面，在相干頻移鍵控或二進制的FSK ，是沒有間斷期在輸出信號。
In this digital era, the modulation of signals are carried out by a computer, which converts the binary data to FSK signals for transmission, and in turn receives the incoming FSK signals and converts it to corresponding digital low and high, the language the computer understands best.在這數(shù)字化時代，調(diào)制的信號是由一臺電腦，而轉(zhuǎn)換為二進制數(shù)據(jù)的FSK信號的傳輸，從而獲得來襲的FSK信號轉(zhuǎn)換為相應(yīng)的數(shù)字低及高，語言的計算機理解最好的。
There are Frequency Shift Keying standards, used in various countries across the globe.有頻移鍵控標準，可應(yīng)用在許多國家，在全球各地。 They are the ETSI FSK, Bellcore FSK, BT (British Telecom) FSK and CCA (Cable Communication Association) FSK.他們是歐洲電信標準協(xié)會的FSK ，貝爾的FSK ，英國電信（英國電信）的FSK及文建會（電纜通信協(xié)會）的FSK 。 The Bellcore standard is used in United States, Australia, China, Hong Kong and Singapore.在貝爾標準是用來在美國，澳大利亞，中國，香港和新加坡。 It uses the 1200 baud Bell 202 tone modulation and the first bit of data is transferred after receiving the first ring tone.它使用1200波特率貝爾202音頻調(diào)制和第一位元的資料傳送接收后首鈴聲。
The BT FSK or British Telecom Frequency Shift Keying is an original standard that was developed by the British Telecom.英國電訊的FSK或英國電信的頻移鍵控，是原來的標準，這是由英國電信公司。 This standard wakes up the display with a line reversal and transmits the data as CITT V23 modem tones, a format similar to MDMF.這個標準醒來，展示同一條線扭轉(zhuǎn)和傳遞數(shù)據(jù)，作為citt v23調(diào)制解調(diào)器鈴聲，格式相似mdmf 。 British Telecom itself uses this standard as well as some wireless networks such as the late Lonica and some cable companies as well.英國電信本身使用這個標準，以及部分無線網(wǎng)絡(luò)，如已故lonica及一些有線電視公司以及。 More details about the British Telecom Frequency Shift Keying standards can be obtained from the document Designing Caller Identification Delivery Using XR-2211 for B.T.更詳細了解英國電信頻移鍵控標準，可以直接從該文件中的設(shè)計來電識別交付使用XR型- 2211為英國電信 or the Supplier Information Notes (SINs) 227 and 242.或供應(yīng)商的資料，筆記（罪過） 227和242 。
In Cable Communication Association standard, data is sent after a short first ring, either as Bell 202 or V23 tones.在有線通信協(xié)會標準，使數(shù)據(jù)發(fā)送經(jīng)過短暫的第一環(huán)，無論是貝爾202或v23鈴聲。 Here the transport layer is more like Bellcore even though the data format looks much like British Telecom's, because of this, European or North American kits are more likely to detect it.這里交通層更象是貝爾即使數(shù)據(jù)格式看起來很像英國電訊公司的，正因為如此，歐洲或北美袋較容易探測出來。
The basic principle of Frequency Shift Keying is at least a century old.基本原則的頻移鍵控是至少一個世紀老人。 Despite its age, FSK has successfully maintained its use during more modern times and has adapted well to the digital domain, and continues to serve those that need to transfer data via computer, cable, or wire.盡管其年齡， FSK信號已成功地保持了其使用過程中更現(xiàn)代的時代，并已適應(yīng)良好，數(shù)位領(lǐng)域，并繼續(xù)服務(wù)于那些需要傳輸?shù)臄?shù)據(jù)通過計算機，電纜，電線。 There is no doubt that FSK will be around as long as there is a need to transmit information in a highly effective and affordable manner.這是毫無疑問的FSK會期約，只要有需要，以傳遞信息，在一個高效和負擔得起的方式。 FSK就是這個意思。