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In data transmission, 'pulse shaping' is the process of changing the wave form and spectral characteristics of pulses used in digital modulation methods, in view to improve the spectral efficiency and avoid inter-symbol interference. Typically the waveform is made more smooth than the non pulse-shaped rectangular waveform. Thus high-frequency components are attenuated.
Pulse shaping can be considered as linear filtering, today normally implemented by digital signal processing, for example a waveform table and direct digital synthesis.
Sender side pulse shaping is often combined with a receiver side matched filter.
Common examples of pulse-shaping filters are:

★ Sinc-shaped pulse

★ Raised-cosine filter

Contents

See also

References

See also

★ Femtosecond pulse shaping

★ Matched filter

References

★ National Instruments Signal Generator Tutorial, Pulse Shaping to Improve Spectral Efficiency

★ National Instruments Measurement Fundamentals Tutorial, Pulse-Shape Filtering in Communications Systems