| 摘要: |
| 提出了一种幅度准恒包络、相位连续的差分相移键控调制与解调方法。该方法设计了
一组基带信号集合，根据输入的信息值和状态值选择基带信号来实现信号调制。在信号解调
中，通过计算接收信号在一个符号持续时间内的相位变化累积量来判决发送信息。仿真结果
表明，
该调制方法具有良好的频谱特性和准恒包络特性，并且避免了本振偏离、多普勒频移等引起
的符号间相位变化对信号解调的影响。 |
| 关键词: 突发通信 差分相移键控 连续相位调制 准恒包络 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| Inner Symbol Continuous Phase Differential Phase Shift Keying(ISCP-DPSK) Modulation |
| ZHANG Jian |
| (Southwest China Institute of Electronic Technology, Chengdu 610036，China) |
| Abstract: |
| A method of differential phase shift keying(DPSK) with qu
asi constant envelope and continuous phase is proposed. A set of baseband signal
is designed i
n advance. Modulation is realized by choosing a signal from the baseband signal
set based on input bits and modulation state. Demodulation only needs to calcula
te the phase shift cumulant of signal within the symbol duration. The simulation
result demonstrates that the signal of proposed modulation occupies narrow RF s
pectrum with quasi constant envelope and can be immune to the phase shift caused
by Doppler, carrier frequency offset and so on. |
| Key words: burst communication difference phase shift keying(DPSK) continuous phase modulation quasi constant envelope |
