基于部分带干扰的慢调频差分迭代GMSK接收机
n Iterative Slow FH-GMSK Receiver with Differential Detection in Partial-Band jamming
本文主要研究了部分带干扰下的慢调频GMSK接收机。本文提出了一种可估计部分带干扰信息的非相干迭代解调与译码方案。这种方案将最大后验概率（MAP）算法与差分检测相结合，并向后续的MAP译码器提供软外信息，从而消除因GMSK调制而引起的码间干扰。此外本接收机还结合了部分带干扰信息检测器，它可估测干扰信息以调整迭代译码的方案，从而抵抗干扰。仿真结果表明我们提出的接收机在误码率为10-5时，要比只有差分检测的方案要好6dB以上，并可精准的估计出干扰信息。
his paper considers a slow frequency hopped system with Gaussian Minimum Shift Keying modulation (SFH-GMSK) in a partial-band jamming (PBJ) environment. We use an iterative incoherent demodulation and decoding scheme to combat intersymbol interference (ISI) caused by GMSK modulation. A maximum a posteriori probability (MAP) algorithm is applied to a differential phase detector (DPD) to provide the soft extrinsic information to the subsequent MAP decoder. Besides we employed a jamming state information (JSI) estimator to suppress the PBJ. Simulation results show that our iterative receiver outperforms more than 6 dB than that of DPD only scheme at an error rate of 10-5 with an accurate JSI estimation.
李玉柏、许贝旎
无线通信通信电子对抗
差分检测MAP算法慢调频干扰估计
PDMAPslow frequency hopped (SFH)jamming state estimation
李玉柏,许贝旎.基于部分带干扰的慢调频差分迭代GMSK接收机[EB/OL].(2010-03-09)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201003-226.点此复制
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