詞語解釋
“相移鍵控”是一種用于數據傳輸的鍵控技術，它是一種將信號轉換成數字信號的技術，它可以把模擬信號轉換成數字信號，然后進行傳輸。相移鍵控是一種基于相移的鍵控技術，它的主要原理是通過將輸入的模擬信號轉換成數字信號，然后將數字信號通過鍵控的方式進行傳輸，從而實現模擬信號的傳輸。 相移鍵控的應用主要是用于模擬信號的傳輸，它可以將模擬信號轉換成數字信號，然后通過鍵控的方式進行傳輸，從而實現模擬信號的傳輸。它可以用于多種模擬信號的傳輸，如語音信號、視頻信號等。相移鍵控的優(yōu)勢在于可以提高信號的傳輸效率，減少信號的失真，并且可以把模擬信號轉換成數字信號，從而使信號的傳輸更加穩(wěn)定。 相移鍵控的應用非常廣泛，它可以用于無線電通信、數據傳輸、視頻傳輸、語音傳輸等。例如，在無線電通信中，相移鍵控可以將模擬信號轉換成數字信號，然后通過鍵控的方式進行傳輸，從而實現模擬信號的傳輸。在視頻傳輸中，相移鍵控可以將視頻信號轉換成數字信號，然后通過鍵控的方式進行傳輸，從而實現視頻信號的傳輸。在語音傳輸中，相移鍵控可以將語音信號轉換成數字信號，然后通過鍵控的方式進行傳輸，從而實現語音信號的傳輸。 總之，相移鍵控是一種用于數據傳輸的鍵控技術，它可以把模擬信號轉換成數字信號，然后通過鍵控的方式進行傳輸，從而實現模擬信號的傳輸。它的應用非常廣泛，可以用于無線電通信、數據傳輸、視頻傳輸、語音傳輸等，可以提高信號的傳輸效率，減少信號的失真，從而使信號的傳輸更加穩(wěn)定。 Phase Shift Keying -- 相移鍵控 在某些調制解調器中用于數據傳輸的調制系統(tǒng)，在最簡單的方式中，二進制調制信號產生0和1。載波相位來表示信號占和空或者二進制1和O。對于有線線路上較高的數據傳輸速率，可能發(fā)生4個或8個不同的相移，系統(tǒng)要求在接收機上有精確和穩(wěn)定的參考相位來分辨所使用的各種相位。利用不同的連續(xù)的相移鍵控，這個參考相位被按照相位改變而進行的編碼數據所取代，并且通過將相位與前面的位進行比較來檢測。 Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a reference signal (the carrier wave). Any digital modulation scheme uses a number of distinct signals to represent digital data. In the case of PSK, a finite number of phases are used. Each of these phases is assigned a unique pattern of binary bits. Usually, each phase encodes an equal number of bits. Each pattern of bits forms the symbol that is represented by the particular phase. The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the phase of the received signal and maps it back to the symbol it represents, thus recovering the original data. This requires the receiver to be able to compare the phase of the received signal to a reference signal — such a system is termed coherent. Alternatively, instead of using the bit patterns to set the phase of the wave, it can instead be used to change it by a specified amount. The demodulator then determines the changes in the phase of the received signal rather than the phase itself. Since this scheme depends on the difference between successive phases, it is termed differential phase-shift keying (DPSK). DPSK can be significantly simpler to implement than ordinary PSK since there is no need for the demodulator to have a copy of the reference signal to determine the exact phase of the received signal (it is a non-coherent scheme). In exchange, it produces more erroneous demodulations. The exact requirements of the particular scenario under consideration determine which scheme is used.
Phase Shift Keying -- 相移鍵控 在某些調制解調器中用于數據傳輸的調制系統(tǒng)，在最簡單的方式中，二進制調制信號產生0和1。載波相位來表示信號占和空或者二進制1和O。對于有線線路上較高的數據傳輸速率，可能發(fā)生4個或8個不同的相移，系統(tǒng)要求在接收機上有精確和穩(wěn)定的參考相位來分辨所使用的各種相位。利用不同的連續(xù)的相移鍵控，這個參考相位被按照相位改變而進行的編碼數據所取代，并且通過將相位與前面的位進行比較來檢測。 Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a reference signal (the carrier wave). Any digital modulation scheme uses a number of distinct signals to represent digital data. In the case of PSK, a finite number of phases are used. Each of these phases is assigned a unique pattern of binary bits. Usually, each phase encodes an equal number of bits. Each pattern of bits forms the symbol that is represented by the particular phase. The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the phase of the received signal and maps it back to the symbol it represents, thus recovering the original data. This requires the receiver to be able to compare the phase of the received signal to a reference signal — such a system is termed coherent. Alternatively, instead of using the bit patterns to set the phase of the wave, it can instead be used to change it by a specified amount. The demodulator then determines the changes in the phase of the received signal rather than the phase itself. Since this scheme depends on the difference between successive phases, it is termed differential phase-shift keying (DPSK). DPSK can be significantly simpler to implement than ordinary PSK since there is no need for the demodulator to have a copy of the reference signal to determine the exact phase of the received signal (it is a non-coherent scheme). In exchange, it produces more erroneous demodulations. The exact requirements of the particular scenario under consideration determine which scheme is used.
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