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[Discuss-gnuradio] Is it possible to have 2 TX x 1 RX MISO in GNU Radio
From: |
Nick Iliev |
Subject: |
[Discuss-gnuradio] Is it possible to have 2 TX x 1 RX MISO in GNU Radio |
Date: |
Sat, 2 Jun 2012 17:47:50 -0400 |
Hello,
we have implemented a 2 TX x 1 RX MISO testbed with GNU Radio 3.4 and
USRP1 . Both transmitters are using at 2.4GHz ( actually tx1 uses
2.401GHz and tx2 uses 2.403GHz ) , and are sending data ( BPSK
modulated ) at the same time ( in the same time slot ).
The summation of both transmissions is causing problems at the receiver :
1 - the Costas PLL does not appear to lock to a single frequency
2 - the MM bit-synchronizer does not appear to work
Has anyone attempted this type of MISO system with the default GNU
Radio 3.4 and USRP1 distribution ?
Our goal is to plot the constellation of all superimposed received
symbols but to achieve this we need a frequency-locked receiver and a
recovered ( bit-synchronous ) clock.
Han and Nick
UIC Wireless Lab
- [Discuss-gnuradio] Is it possible to have 2 TX x 1 RX MISO in GNU Radio,
Nick Iliev <=