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FPGA Implementable Frame Synchronization Algorithm for Burst Mode GMSK

机译:突发模式GMSK的FPGA可实现帧同步算法

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摘要

In time division multiple access (TDMA) communication systems, correctly estimating the synchronization parameters is very important for reliable data transfer. The algorithms used for frequency/phase and symbol timing estimates are generally accepted as knowing the start of signal (SoS) parameter. Therefore, within these parameters, the SoS parameter is of particularly great importance. In this study, a reduced version of the SoS estimation algorithm introduced by Hosseini and Perrins is presented to estimate SoS for Gaussian Minimum Shift Keying (GMSK) modulated signals in burst format over additive white Gaussian noise (AWGN) channels. The reduced algorithm can be implemented on FPGÁ by using half the number of complex multipliers that would be required by the double correlation method and is robust to carrier frequency/phase errors. Simulations performed under 0.1 normalized frequency offset conditions show that the proposed algorithm has a probability of false lock which is less than 7 x 10~(-2), even at 0 dB SNR level.
机译:在时分多址(TDMA)通信系统中,正确估计同步参数对于可靠的数据传输非常重要。通常,在知道信号开始(SoS)参数的情况下,接受用于频率/相位和符号时序估计的算法。因此,在这些参数中,SoS参数特别重要。在这项研究中,提出了由Hosseini和Perrins引入的SoS估计算法的简化版本,以估计加性高斯白噪声(AWGN)信道上突发格式的高斯最小频移键控(GMSK)调制信号的SoS。通过使用双相关方法所需的复数乘法器的一半数量,该简化算法可以在FPGÁ上实现,并且对载波频率/相位误差具有鲁棒性。在0.1归一化频率偏移条件下进行的仿真表明,即使在SNR值为0 dB的情况下,该算法的误锁概率也小于7 x 10〜(-2)。

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