# USRP MIMO-OFDM cannot receive packet

**URL:** <https://www.ruby-forum.com/t/usrp-mimo-ofdm-cannot-receive-packet/244968>\
**Category:** GNU Radio\
**Created:** [July 20, 2016, 2:26pm UTC](https://www.ruby-forum.com/t/usrp-mimo-ofdm-cannot-receive-packet/244968 "2016-07-20T14:26:49Z")\
**Posts on this page:** 1\
**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:** [July 20, 2016, 2:26pm UTC](https://www.ruby-forum.com/t/usrp-mimo-ofdm-cannot-receive-packet/244968/1 "2016-07-20T14:26:49Z")

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Recently,I build the 2x2 mimo-ofdm system with only mimo cable.The  
transmitting end can successful the packet,while the send end can only  
do coarse freq1 and freq2 estimation,sometimes could receiver one or two  
packet and not get the successive packages of transmitting end.I don’t  
know what problem happened. Could anyone points out the problem for me?  
If It is synchronization issue.