A high-performance reduced-complexity GMSK demodulator
A high-performance reduced-complexity GMSK demodulator
复制标题
高性能、降低复杂度的 GMSK 解调器
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
G. Saulnier
中科院分区：
文献类型：
--
作者：
N. Al;G. Saulnier
对AWGN信道下GMSK调制（BT=0.3）的四状态自适应MLSE解调器进行了分析和仿真。该解调器使用GMSK信号的线性表示，并达到与MSK相同的误码性能。在MLSE分支度量计算中使用的信道脉冲响应系数以封闭形式导出，并以决策导向模式进行调整，以抵消由于在线性表示中仅保留一项而引起的任何性能损失。在MLSE解调器中的状态的数量被减少到两个，在约0.1 dB的性能损失，通过在它前面的白化匹配滤波器。
A four-state adaptive MLSE demodulator for GMSK modulation (BT=0.3) on AWGN channels is analyzed and simulated. This demodulator uses the linear representation of GMSK signals and achieves the same BER performance as MSK. The channel impulse response coefficients used in the MLSE branch metric calculations are derived in closed form and adapted in a decision-directed mode to offset any performance losses incurred by retaining only one term in the linear representation. The number of states in the MLSE demodulator is reduced to two, at about 0.1 dB performance loss, by preceding it with a whitened matched filter.