# Purpose of packet encoder/decoder block? **URL:** \ **Category:** GNU Radio\ **Created:** [January 6, 2014, 10:56am UTC](https://www.ruby-forum.com/t/purpose-of-packet-encoder-decoder-block/238358 "2014-01-06T10:56:34Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [January 6, 2014, 10:56am UTC](https://www.ruby-forum.com/t/purpose-of-packet-encoder-decoder-block/238358/1 "2014-01-06T10:56:34Z")
what is the purpose of encoder/decoder block? is it used for synchronization or for some other purpose? please answer me as soon as possible regards Irfan U. ---
**Author:** ![Irfan\_U](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/57b2e6/32.png) [@Irfan\_U](https://www.ruby-forum.com/u/Irfan_U)\ **Post date:** [January 6, 2014, 3:45pm UTC](https://www.ruby-forum.com/t/purpose-of-packet-encoder-decoder-block/238358/2 "2014-01-06T15:45:47Z")
Hi All, I’m designing a coherent bursting GMSK receiver which includes MLSE. What will be the correct flow graph of the receiver: 1. ``` Preamble detection --> carrier tracking --> phase tracking --> ``` MLSE 1. ``` Preamble detection --> MLSE --> carrier tracking --> phase ``` tracking Thank you, Alex From: discuss-gnuradio-bounces+alex=removed\_email\_address@domain.invalid [[mailto:discuss-gnuradio-bounces+alex=removed\_email\_address@domain.invalid](mailto:discuss-gnuradio-bounces+alex=removed_email_address@domain.invalid)] On Behalf Of Irfan U. Sent: Monday, January 06, 2014 11:55 AM To: removed\_email\_address@domain.invalid Subject: [Discuss-gnuradio] purpose of packet encoder/decoder block? what is the purpose of encoder/decoder block? is it used for synchronization or for some other purpose? please answer me as soon as possible regards Irfan U.