针对电信部门提供的多种接入方式解决高密度、大容量的用户数据接入服务问题,提出In- ternet拨号上网系统中数据接入板的优化解决方案,采用嵌入式操作系统实现HDLC POOL和MO- DEM POOL的数据整合优化设计,并给出性能测试结果。实际应用...针对电信部门提供的多种接入方式解决高密度、大容量的用户数据接入服务问题,提出In- ternet拨号上网系统中数据接入板的优化解决方案,采用嵌入式操作系统实现HDLC POOL和MO- DEM POOL的数据整合优化设计,并给出性能测试结果。实际应用表明,数据整合技术大大优化了系统接入方式,达到高密度、高可靠性的技术要求,明显降低了设备成本。展开更多
This paper first calculates numerically the Symmetric Information Rate (SIR) of Cotinuous Phase Modulation (CPM) schemes over Additive White Gaussian Noise (AWGN) channel, modeling CPM and channel as a Memory-less Mod...This paper first calculates numerically the Symmetric Information Rate (SIR) of Cotinuous Phase Modulation (CPM) schemes over Additive White Gaussian Noise (AWGN) channel, modeling CPM and channel as a Memory-less Modulator (MM) plus a Markov Finite State Channel (FSMC), then proposes an optimal detector, which is of BCJR based Decision Feedback Detector (DFD) but non-iterative. It can achieve the SIR as the sequence length approaches infinity while the complexity is extremely low. Finally, both theoretic proof and numerical simulation are performed to show the op- timality. Simulation results show that it nearly achieves the theoretic bound and outperforms the Viterbi Detector (VD) with 2dB in low Eb/N0.展开更多
文摘针对电信部门提供的多种接入方式解决高密度、大容量的用户数据接入服务问题,提出In- ternet拨号上网系统中数据接入板的优化解决方案,采用嵌入式操作系统实现HDLC POOL和MO- DEM POOL的数据整合优化设计,并给出性能测试结果。实际应用表明,数据整合技术大大优化了系统接入方式,达到高密度、高可靠性的技术要求,明显降低了设备成本。
基金Supported by the Key Industrial Research of Zhejiang Province (No. 2006C21009).
文摘This paper first calculates numerically the Symmetric Information Rate (SIR) of Cotinuous Phase Modulation (CPM) schemes over Additive White Gaussian Noise (AWGN) channel, modeling CPM and channel as a Memory-less Modulator (MM) plus a Markov Finite State Channel (FSMC), then proposes an optimal detector, which is of BCJR based Decision Feedback Detector (DFD) but non-iterative. It can achieve the SIR as the sequence length approaches infinity while the complexity is extremely low. Finally, both theoretic proof and numerical simulation are performed to show the op- timality. Simulation results show that it nearly achieves the theoretic bound and outperforms the Viterbi Detector (VD) with 2dB in low Eb/N0.
