# (no subject)

**URL:** <https://www.ruby-forum.com/t/no-subject/241133>\
**Category:** GNU Radio\
**Created:** [May 14, 2014, 11:10am UTC](https://www.ruby-forum.com/t/no-subject/241133 "2014-05-14T11:10:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 14, 2014, 11:10am UTC](https://www.ruby-forum.com/t/no-subject/241133/1 "2014-05-14T11:10:36Z")

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I am confused about the terms full duplex and half duplex in context of  
USRP…If i am using two antennas attached on the same channel on  
B210(one  
on TX/RX and other on RX2).I am Rxing through one antenna and  
retransmitting the signal with the other antenna…Am i operating on full  
duplex or half duplex??

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [May 14, 2014, 11:15am UTC](https://www.ruby-forum.com/t/no-subject/241133/2 "2014-05-14T11:15:31Z")

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Full duplex implies simultaneous transmission and reception, almost  
always  
on different frequencies. In the cellular world this is called  
frequency  
division duplexing, or FDD. Full duplex on a USRP implies transmitting  
on  
one connector (TX/RX) and receiving on the other (RX2).

Half duplex means you never TX and RX simultaneously.

Matt

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [May 14, 2014, 11:17am UTC](https://www.ruby-forum.com/t/no-subject/241133/3 "2014-05-14T11:17:22Z")

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Thank you Matt!