SOQPSK-TG信号的简化状态解调器

发布时间：2018-04-15 05:14

本文选题：成形偏移正交相移键控 + 非递归　；参考：《西安电子科技大学学报》2014年05期

【摘要】：针对部分响应成形偏移正交相移键控(SOQPSK-TG)信号的解调器复杂度较高的问题,在研究递归SOQPSK-TG信号的判决反馈简化解调器的基础上,对于非递归SOQPSK-TG信号提出了一种利用幸存路径的简化两状态解调器.该解调器在非递归SOQPSK-TG信号四状态网格的基础上,通过合理的状态合并,得到简化两状态网格;在接收机中采用该两状态网格作为状态转移网格对接收信号进行解调,在解调过程中由幸存路径法得到各支路的标准信号.仿真结果表明,在低信噪比区域,非递归SOQPSK-TG信号比递归SOQPSK-TG信号具有更优越的性能;与四状态解调算法相比,非递归SOQPSK-TG信号的简化两状态解调器有0.5~1.0dB的信噪比损失,但接收机具有较小的运算复杂度,有利于工程应用.
[Abstract]:According to the partial response shaping offset quadrature phase shift keying (SOQPSK-TG) demodulator signal high complexity based on recursive SOQPSK-TG signal decision feedback simplified demodulator, for non recursive SOQPSK-TG signal is proposed based on a simplified two state demodulator. The survivor demodulator based on non recursive the SOQPSK-TG signals of the four state grid, through the reasonable state of merger, simplified two state grid; at the receiver by the two state grid as the transfer of State Grid to demodulate the received signal, the demodulation is standard signal of each branch by the surviving path process. The simulation results show that in the low SNR region non recursive, SOQPSK-TG signal has better performance than the recursive SOQPSK-TG signal; compared with the four state SOQPSK-TG signal demodulation algorithm, non recursive simplified two state demodulator 0.5 The signal to noise ratio (SNR) of ~1.0dB is lost, but the receiver has a small computational complexity, which is beneficial to the engineering application.

【作者单位】：西安电子科技大学综合业务网理论及关键技术国家重点实验室;
【基金】：国家自然科学基金资助项目(60902039,61271175) 中央高校基本科研业务费专项资金资助项目(JB140114,K5051201043)
【分类号】：TN911.3

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