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词汇 Vestigial sideband
分类 英语词汇 英语翻译词典
释义

Vestigial sideband

中文百科

单边带调制 Single-sideband modulation

（重定向自Vestigial sideband）
调幅和单边带信号频谱示意图。相比于基带，下边带（LSB）频谱是反相的。举例来说，一个2 kHz的音频基带信号调制到一个5 MHz的载波上，如果是上边带（USB）的话会产生5.002 MHz的频率，下边带就会是4.998 MHz。
普通调幅信号频谱图。
Frequency-domain depiction of the mathematical steps that convert a baseband function into a single-sideband radio signal.
A Collins KWM-1, an early Amateur Radio transceiver that featured SSB voice capability

在无线电通信中，单边带调制（SSB）或单边带抑制载波（SSB-SC），是一种可以更加有效的利用电能和带宽的调幅技术。调幅技术输出的调制信号带宽为源信号的两倍。单边带调制技术可以避免带宽翻倍，同时避免将能量浪费在载波上，不过因为设备变得复杂，成本也会增加。

英语百科

Single-sideband modulation 单边带调制

（重定向自Vestigial sideband）
Illustration of the spectrum of AM and SSB signals. The lower side band (LSB) spectrum is inverted compared to the baseband. As an example, a 2 kHz audio baseband signal modulated onto a 5 MHz carrier will produce a frequency of 5.002 MHz if upper side band (USB) is used or 4.998 MHz if LSB is used.
Frequency-domain depiction of the mathematical steps that convert a baseband function into a single-sideband radio signal.
A Collins KWM-1, an early Amateur Radio transceiver that featured SSB voice capability
VSB modulation

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a refinement of amplitude modulation which uses transmitter power and bandwidth more efficiently. Amplitude modulation produces an output signal that has twice the bandwidth of the original baseband signal. Single-sideband modulation avoids this bandwidth doubling, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver.
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