双音频键控
Second, the paper analyzes the single-pulse modulation which includes pulse amplitude modulation, on-off keying modulation, pulse position modulation and two-phase modulation.
其次分析了单脉冲调制中的脉冲幅度调制、开关键控调制、脉冲位置调制和二相调制。
The two outstanding advantages of PPM compared with on-off keying modulation are presented: higher power efficiency and extremely lower symbol error rate.
分析了脉冲位置调制与目前的实际系统中应用最多的开关键控调制(OOK,On-Off Keying)相比最突出的两个优点:功率有效性、大大降低了误码率。
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