BPSK二进制相移键控解调

Robiul7410

BPSK是PSK的一种简单形式，它使用两个不同的载波相位来表示二进制值0和1。BPSK 解调可以使用由混频器和低通滤波器组成的相干解调器来实现。接收到的 BPSK 信号与本地生成的载波信号相乘，并对所得信号进行低通滤波以恢复原始数字消息。

QPSK（正交相移键控）解调
QPSK 是 PSK 的高级形式，它使用四个不同的载波相位同时表示两位数据。QPSK 解调需 卡塔尔 WhatsApp 号码数据 要使用两个相干解调器，一个用于接收 QPSK 信号的每个分量（相位和正交分量）。然后将解调的输出组合起来重建原始数字消息。

8PSK（8相相移）解调
8PSK 是 PSK 的更高级形式，它使用八个不同的载波相位同时表示三位数据。8PSK解调与QPSK解调类似，但需要更复杂的信号处理技术来准确地重建原始数字消息。

频移键控 (FSK) 解调
频移键控（FSK）是一种数字调制方法，其中载波的频率根据数字消息信号而变化。FSK 解调涉及从调制载波中提取原始数字消息。FSK 解调主要有两种类型：

非相干 FSK 解调
非相干 FSK 解调不需要接收的 FSK 信号和本地生成的载波信号之间的相位同步。常见的方法之一是鉴频器，它将FSK信号的频率变化转换为幅度变化。然后鉴别器的输出通过决策电路以恢复原始数字消息。

相干 FSK 解调
相干 FSK 解调需要接收的 FSK 信号和本地生成的载波信号之间的相位同步。这可以通过使用基于 PLL 的解调器来实现，类似于 FM 和 PM 解调中使用的方法。然后 PLL 的输出通过判决电路以恢复原始数字消息。




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