扩展的二元相移键控调制参数性能比较

摘要

扩展的二元相移键控（EBPSK）是一种十分灵活的调制方式，只改变几个调制参数即可在调制方式、频谱效率、功率效率和码率等方面进行选择，而解调器可以自适应这种改变。分析了相同的传输码率下EBPSK调制中最简单的3种特例，即反相调制、缺周期调制和窄脉冲调制，并对其功率谱、冲击滤波器输出及非编码解调性能进行了仿真比较，仿真结果揭示了3种调制方式在调制信号、功率谱、冲击滤波器输出及解调性能之间的差异。%Extended binary phase shift keying （EBPSK） is a type of modulation which is flexible. By changing some modulation parameters, we could select among modulation method, spectrum efficiency, power efficiency, code rate and so on. Meanwhile, demodulator could self-adapt to these changes. We analyzed three simplest special cases of the EBPSK modulation under the same code rate, i.e. phase inversion modulation, missing cycle modulation, and narrow-pulse modulation, and simulated and compared their power spectrum, output of the impact filter, and demodulation performance without channel coding. Simulation result proclaims differences among the modulation signal, power spectrum, output of the impact filter and demodulation performance of the three modulation methods.