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[Discuss-gnuradio] SRRC pulse shaping question

From: George Sklivanitis
Subject: [Discuss-gnuradio] SRRC pulse shaping question
Date: Tue, 4 Dec 2012 23:35:28 -0500

Hello all,

I have a question applying to everybody that have tried transmitting symbols in different kinds of modulation (BPSK, QPSK, GMSK etc).
I am using the following configuration in GNU Radio ( random source block -> bytes to symbols -> SRRC block -> file sink)

The attached figure plots the generated symbols (+1,-1)  with red color along with the upsampled SRRC waveform (blue)
For some reason that I am not able to understand the last 8-bits do not have a correspondence with the waveform created. In other words
the waveform is "cut" at the last byte.
Can anyone help me with the above.


Sklivanitis Georgios
PhD Student

Attachment: upsampled.png
Description: PNG image

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