NDLI: A Performance-Optimized Design of Receiving Filter for Non-Ideally Shaped Modulated Signals

Content Provider	IEEE Xplore Digital Library
Author	Tengfei Xing Yafeng Zhan Jianhua Lu
Copyright Year	2008
Description	Author affiliation: Dept. of Electron. Eng., Tsinghua Univ., Beijing (Tengfei Xing; Yafeng Zhan; Jianhua Lu)
Abstract	An improved design of receiving filter for non- ideally shaped modulated signals which provides better performance than existing schemes is proposed. By concerning both Inter-Symbol-Interference (ISI) and the degree of waveform mismatch between the transmitted signal and impulse response of the receiving filter, the exact expression of the Signal-to-Noise Ratio (SNR) loss that represents the performance degradation is derived, and the performance is compared with that of the ideally shaped signals' demodulation. The existing schemes such as root-raised-cosine (RRC) receiving filters don't perform well for non-ideally shaped situations, since large degrees of both ISI and waveform mismatch exist. To improve the performance and avoid the complexity of applying equalizer in receivers, the proposed scheme designs the impulse response of the receiving filter by optimizing the SNR loss to the minimum value, and it uses simulated annealing as the optimization algorithm. It is shown that the new method can achieve better performance than existing schemes, especially when the modulation order or the SNR is relatively high. Finally the conclusion is validated by simulation results.
Starting Page	914
Ending Page	919
File Size	171031
Page Count	6
File Format	PDF
ISBN	9781424420759
DOI	10.1109/ICC.2008.179
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal design Filters Performance loss Intersymbol interference Design optimization Signal to noise ratio Propagation losses Degradation Demodulation Equalizers
Content Type	Text
Resource Type	Article

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