# Request regarding Channel Estimator Block

**URL:** <https://www.ruby-forum.com/t/request-regarding-channel-estimator-block/242848>\
**Category:** GNU Radio\
**Created:** [August 2, 2015, 8:33pm UTC](https://www.ruby-forum.com/t/request-regarding-channel-estimator-block/242848 "2015-08-02T20:33:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [August 2, 2015, 8:33pm UTC](https://www.ruby-forum.com/t/request-regarding-channel-estimator-block/242848/1 "2015-08-02T20:33:18Z")

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Hello,

I am unable to understand the _max-carr-offset_ parameter in \*Channel  
Estimator block. \*How this parameter help in order to receive

packets correctly in OFDM. What is the relation between this parameter  
and _Frequency  
offse_t parameter in \*Channel Model \*

_block_. Will you please help me regarding that.

Thank you.

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [August 3, 2015, 6:59pm UTC](https://www.ruby-forum.com/t/request-regarding-channel-estimator-block/242848/2 "2015-08-03T18:59:22Z")

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On 02.08.2015 11:32, Gaddam Yamuna wrote:

> Hello,
> 
> I am unable to understand the _max-carr-offset_ parameter in \*Channel  
> Estimator block. \*How this parameter help in order to receive

It effectively limits the search range, and it’s specified in multiples  
of integer carrier offsets. The channel model simply takes an arbitrary  
frequency to offset your signal.

M