传输信号采用正交相移键控调制方式，以有效利用有限通信带宽。
Quadrature phase shift keying(QPSK) signaling is employed to make efficient use of the available bandwidth.
针对二进制相移键控调制的二维扩频系统，分析了其抗单音干扰的性能。
The current analysis focuses on the performance of BPSK modulation on 2-dimensional spread spectrum system with single-tone jamming.
第三，对采用不同调制格式（包括幅移键控和二进制相移键控）的光副载波复用（OSCM）系统中，PMD引起的功率代价进行了量化。
Thirdly, we quantify the power penalty caused by the PMD in optical subcarrier multiplexing (OSCM) system with amplitude shift keying (ASK) and binary phase shift keying (BPSK).
本文提出了一种新的差分调制方式，我们称之为相干幅度差分相移键控(CADPSK)。
The thesis presents a new differential modulation, Coherent Amplitude and differential Phase Shift Key (CADPSK).
偏移四相相移键控（OQPSK）是一种适用于在限带非线性信道中使用的高效恒包络数字调制技术。
The offset quadrature phase-shift-keyed(OQPSK) is an effective digital constant envelope modulation for band-limited nonlinear channel.
提出了一种实现MPSK(多进制相移键控)调制系统的新方法。
A novel design and implementation approach to the modulation system of MPSK has been proposed in this paper.
介绍了一种适用于二相相移键控(BPSK)扩频调制信号的数字式处理方法。
This paper proposes a novel digital IF processing method of BPSK signal.
设计出了二次调制系统：采用连续可变斜率增量调制（CV SD）实现模拟话音信号与数字编码的转换，采用二进制相对相移键控（2DPSK）作为数字调制方式。
A twice modulation is designed:, CVSD was adopted to realize conversion between analog and digital voice signals, 2DPSK was used as the digital modulation mode.
与当前通过编码的相移键控(PSK)调制相对，还存在另外的通过子载波的调制。
Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier.
正如这种新操作模式的名字所指的，PSK(相移键控)调制载波的相位。
As the name of the new mode says, PSK (phase shift keying) modulates the carrier phase.
为了克服由多径传播造成的相移失真难题(特别是在HF链路里)，调制采用差分相移键控(DPSK)来完成。
To cope with the problem of phase shifts caused by different propagation paths (especially in HF links), the modulation is done in differential phase shift keying (DPSK).
通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。
The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM, FM, SSB, 2ASK, 2FSK, 2PSK, 2QPSK.
通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。
The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM, FM, SSB, 2ASK, 2FSK, 2PSK, 2QPSK.
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