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单词 QPSK
释义

QPSK

英汉-汉英词典
正交相移编码（ Quadrature Phase Shift Keying）；四相相移键控（quadri phase shift keying）
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QPSK 正交相移编码（ Quadrature Phase Shift Keying）；四相相移键控（quadri phase shift keying）

网络短语:
dual-channel QPSK 双信道QPSK
QPSK modulator QPSK调制器
offset QPSK spaggered QPSK 交错四相相移键控
QPSK demodulation QPSK解调
Differencial QPSK 差分四相相移键控
QPSK signal 四进制相移键控信号
channel QPSK 双信道QPSK
dsp qpsk 调制
qpsk Modulation 可清晰显示数位节目
中文百科

相位偏移调制 Phase-shift keying

（重定向自QPSK）
BPSK、QPSK、8PSK及16PSK的BER对SNR图
BPSK的坐标图
QPSK的坐标图，其比特映射符号方式用格雷码映射。
Diagrama de las formas de onda en PSK

相位偏移调制，又称相位移键（PSK，Phase Shift Keying）是一种利用相位差异的信号来发送数据的调制方式。该发送信号必须为正交信号，其基底更须为单位化信号。

一般调制信号的改变部份可分为振幅A（ASK用）、相位\theta （PSK用）及频率f_o （FSK用）三种。其中PSK即利用相位差异来产生的调制方式。

PSK又可称M-PSK或MPSK，目前有BPSK、QPSK、16PSK、64PSK等等，常用的只有QPSK。而M是代表发送信号的符号（symbol）种类。符号越多，发送的比特数越多，自然在固定时间可发送越多的数据量（bps）。

英语百科

Phase-shift keying 相位偏移调变

（重定向自QPSK）
Constellation diagram example for BPSK.
Constellation diagram for QPSK with Gray coding. Each adjacent symbol only differs by one bit.
Conceptual transmitter structure for QPSK. The binary data stream is split into the in-phase and quadrature-phase components. These are then separately modulated onto two orthogonal basis functions. In this implementation, two sinusoids are used. Afterwards, the two signals are superimposed, and the resulting signal is the QPSK signal. Note the use of polar non-return-to-zero encoding. These encoders can be placed before for binary data source, but have been placed after to illustrate the conceptual difference between digital and analog signals involved with digital modulation.
Receiver structure for QPSK. The matched filters can be replaced with correlators. Each detection device uses a reference threshold value to determine whether a 1 or 0 is detected.

Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing (modulating) the phase of a reference signal (the carrier wave). The signal is impressed into the magnetic field x,y area by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs, RFID and Bluetooth communication.
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更新时间：2025/6/16 22:48:43