Threshold and training parameters are not needed with this method, but can recognize higher-order digital modulation types.
该方法无需设置判决门限，也无需进行参数训练，且可以识别大于四阶的数字调制类型。
A digital circuit implementing pulse width modulation controls power delivered in what one can model as a second order or higher order system.
一种数字电路实现的脉冲宽度调制控制在可以将其建模为二阶或更高阶系统的系统中传输的电力。
If the modulation order is different, the higher the order is, the worse the performance is, but the transmitting rate is bigger.
随着调制阶数的增加，正交空时分组码的性能越来越差，但传输速率变大；
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