New Pulse Shapes for CPM Signals

A study on finding new pulse shapes for binary CPM (continuous phase modulation) signals to achieve better spectral and detection performance is carried out. Under the constraint that the power spectral density stays below the GSM spectral envelope, pulse shape is optimized to minimize the error pro...

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Main Authors: Doyuran, E., Tanik, Y.
Format: Conference Proceeding
Language:English
Subjects:
Constraint optimization
Continuous phase modulation
Error probability
Gain
Global System for Mobile Communications
GSM
Modulation
Phase detection
Polynomials
Pulse modulation
Pulse Shaping
Pulse shaping methods
Shape
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Tanik, Y.
description A study on finding new pulse shapes for binary CPM (continuous phase modulation) signals to achieve better spectral and detection performance is carried out. Under the constraint that the power spectral density stays below the GSM spectral envelope, pulse shape is optimized to minimize the error probability. Polynomials are utilized in representing pulse shapes. The performance depends on the degree of the polynomials and the pulse length (L). With 8 th degree polynomials having 4 free parameters, optimization is performed for the case L = 3. The performance of the CPM signal, having the pulse shape found by optimization, is compared with that of GMSK, currently being used as the GSM modulation scheme, and a gain of 1.1 dB is obtained with the optimum pulse shape (L = 3). In increasing the pulse length, much better results are attained. With L = 7, the gain goes up to 2.3 dB with a considerable decrease in the sidelobes
doi_str_mv 10.1109/VETECS.2006.1682811
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subjects Constraint optimization
Continuous phase modulation
Error probability
Gain
Global System for Mobile Communications
GSM
Modulation
Phase detection
Polynomials
Pulse modulation
Pulse Shaping
Pulse shaping methods
Shape
title New Pulse Shapes for CPM Signals
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