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[Discuss-gnuradio] BPSK problem: intermittent inter-symbol interference

From: Edwin Li
Subject: [Discuss-gnuradio] BPSK problem: intermittent inter-symbol interference and phase change
Date: Tue, 29 Aug 2017 03:27:46 +0000


I implemented a simple BPSK system. I ran simulation in GNURadio with no channel effect added. Some of the received packets look weird. The first attachment shows three received packet. They are supposed to be identical. However, the second one suffers from ISI and a phase change.

I also attached my grc files. Could someone take a look at it and help me figure out the cause please? Thank you very much!


Attachment: received_packets.jpg
Description: JPEG image

Attachment: BPSK_receiver.grc
Description: Binary data

Attachment: BPSK_packet_tx.grc
Description: Binary data

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