摘要
在分析正交相移键控调制(π/4-DQPSK)和高斯最小频移键控(GMSK)各自解调方式的基础上,对2种调制方式可变信号的一体化解调技术进行了研究,提出了一种能够节约星上资源的解调方案。该方案以π/4-DQPSK基带差分解调为基础,结合GMSK的一比特差分解调特点,推导出了二者可共用的解调算法,并给出了一体化解调的实现结构。在Matlab环境下对该方案进行了仿真验证,结果表明该方案能够对π/4-DQPSK和GMSK调制方式可变信号进行正确解调,并且与单独解调相比性能损失较小。
On the basis of analyzing their respective demodulation modes of π/4-DQPSK and GMSK,an integrated demodulation technology of variable signals of two modulation modes is studied,and an demodulation scheme of saving on-star resources is put for-ward.Based on baseband differential demodulation of π/4-DQPSK,and in combination with the characteristics of one-bit differential demodulation of GMSK,the demodulation scheme deduces a demodulation algorithm which could be shared byπ/4-DQPSK and GMSK, and provides the implementation structure of the integration of demodulation.The proposed scheme is simulated under the environment of Matlab,and the results show that this scheme could correctly demodulate the variable signal of modulation modes of π/4-DQPSK and GMSK with less performance loss than separate demodulation.
出处
《无线电工程》
2015年第2期30-33,共4页
Radio Engineering
