词语解释
“相移键控”是一种用于数据传输的键控技术，它是一种将信号转换成数字信号的技术，它可以把模拟信号转换成数字信号，然后进行传输。相移键控是一种基于相移的键控技术，它的主要原理是通过将输入的模拟信号转换成数字信号，然后将数字信号通过键控的方式进行传输，从而实现模拟信号的传输。 相移键控的应用主要是用于模拟信号的传输，它可以将模拟信号转换成数字信号，然后通过键控的方式进行传输，从而实现模拟信号的传输。它可以用于多种模拟信号的传输，如语音信号、视频信号等。相移键控的优势在于可以提高信号的传输效率，减少信号的失真，并且可以把模拟信号转换成数字信号，从而使信号的传输更加稳定。 相移键控的应用非常广泛，它可以用于无线电通信、数据传输、视频传输、语音传输等。例如，在无线电通信中，相移键控可以将模拟信号转换成数字信号，然后通过键控的方式进行传输，从而实现模拟信号的传输。在视频传输中，相移键控可以将视频信号转换成数字信号，然后通过键控的方式进行传输，从而实现视频信号的传输。在语音传输中，相移键控可以将语音信号转换成数字信号，然后通过键控的方式进行传输，从而实现语音信号的传输。 总之，相移键控是一种用于数据传输的键控技术，它可以把模拟信号转换成数字信号，然后通过键控的方式进行传输，从而实现模拟信号的传输。它的应用非常广泛，可以用于无线电通信、数据传输、视频传输、语音传输等，可以提高信号的传输效率，减少信号的失真，从而使信号的传输更加稳定。 Phase Shift Keying -- 相移键控 在某些调制解调器中用于数据传输的调制系统，在最简单的方式中，二进制调制信号产生0和1。载波相位来表示信号占和空或者二进制1和O。对于有线线路上较高的数据传输速率，可能发生4个或8个不同的相移，系统要求在接收机上有精确和稳定的参考相位来分辨所使用的各种相位。利用不同的连续的相移键控，这个参考相位被按照相位改变而进行的编码数据所取代，并且通过将相位与前面的位进行比较来检测。 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 -- 相移键控 在某些调制解调器中用于数据传输的调制系统，在最简单的方式中，二进制调制信号产生0和1。载波相位来表示信号占和空或者二进制1和O。对于有线线路上较高的数据传输速率，可能发生4个或8个不同的相移，系统要求在接收机上有精确和稳定的参考相位来分辨所使用的各种相位。利用不同的连续的相移键控，这个参考相位被按照相位改变而进行的编码数据所取代，并且通过将相位与前面的位进行比较来检测。 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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