英德
有道
百度
谷歌
图片
维基
百科
QPSK
正交相移编码（ Quadrature Phase Shift Keying）；四相相移键控（quadri phase shift keying）
- The simulation for QPSK shows that the algorithm can estimate the carrier phase and frequency offset accurately and reduce the system BER effectively.
结果表明，用该算法可以精确估计载波相位和频差，有效地降低系统的误码率。 - The performance estimation of quadrature phase shift keying (QPSK) signaling over a Rice lading channel was simulated and the corresponding analyzing results were obtained.
最后，对数字调制后的QPSK信号通过莱斯衰落信道时的性能进行了仿真估计，并得到相应的分析结果。 - At last we use the same concept to construct a multilevel trellis coded modulation and space time coded modulation for noncoherent decoding based on QPSK and it can have a good error performance too.
最后，将多层次的概念建构以QPSk做调变，可适用非同调解码的篱栅编码调变与时空编码调变，一样可达到良好的错误效能。
QPSK
qq
QQ&A
Qq.hor.
QR
QR code
QRA
QRC
QRCD
qrm
QRP
QRS
QRS complex
QRS deflection
QRST interval
QS
QSA
QSAM
Qsan
QSE
QSL
qsl card
QSO
Qsphy
QSRS
QSS
QST
QSTOL
qsuff
QSY
Qt
qt.
QTAM
QTD
QTM
QTP
qtr
qtr.
qtrly
QTS
qty
qtz
qu
qu.
qua
qua (r)ternary
Quaalude
quab
quachamacine
quack
quack doctor
quack effect
quack grass
quack medicine
quack oneself to death
quack-quack
quacker
quackery
quackgrass
quacking
QQ&A
Qq.hor.
QR
QR code
QRA
QRC
QRCD
qrm
QRP
QRS
QRS complex
QRS deflection
QRST interval
QS
QSA
QSAM
Qsan
QSE
QSL
qsl card
QSO
Qsphy
QSRS
QSS
QST
QSTOL
qsuff
QSY
Qt
qt.
QTAM
QTD
QTM
QTP
qtr
qtr.
qtrly
QTS
qty
qtz
qu
qu.
qua
qua (r)ternary
Quaalude
quab
quachamacine
quack
quack doctor
quack effect
quack grass
quack medicine
quack oneself to death
quack-quack
quacker
quackery
quackgrass
quacking
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