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Re: [Discuss-gnuradio] What is the maximum number of multiple antennas a

From: Josh Blum
Subject: Re: [Discuss-gnuradio] What is the maximum number of multiple antennas at a transmitter?
Date: Sun, 06 Feb 2011 20:50:26 -0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20101208 Lightning/1.0b2 Thunderbird/3.1.7

On 02/06/2011 05:43 PM, Minsuk Kang wrote:
> Hi all,
> We are using USRP1 and 2 WBX d'boards to implement a transmitter with two
> antennas.
> Since the two d'boards are synchronized, it was easy to implement.
> Now we're planning to implement a system with more than 2 transmit antennas.
> Is it possible to have more than 2 transmit antennas with USRP1?
> Or, is it possible with other new USRP hardwares
> (e.g., USRP-N210, USRP-E100, or USRP2)?

USRP-N210, USRP-E100, and USRP2 support (hardware based) timed
transmission and reception. And therefore, it is possible to synchronize
operations across multiple boards. However, this is not the case for USRP1.

I should note that this is an atypical use case for the USRP-E100
because the host computer is the USRP, and is therefore only attached to
one USRP device.


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