Re: [Discuss-gnuradio] multi-tone carrier wave

[Ben Hilburn]

Also, remember that USRPs use quadrature down-conversion, so if you set the sample rate to 20 MS/s, you can see 20 MHz, not 10 MHz.

Cheers,

Ben

On Thu, Aug 2, 2012 at 2:37 PM, Nazmul Islam <address@hidden> wrote:

You can add three sine waves and send them using a single carrier. However, in this approach, the separation of the sine wave frequency components will be limited by the sampling rate.

Let's assume that you can obtain a 20 MS/s sampling rate in your system. You can cover 10 MHz frequency band with this sampling rate. If you use a carrier frequency of 902 MHz, you can send different sine waves up to 912 MHz frequency in this approach.

Thanks,

Nazmul

On Thu, Aug 2, 2012 at 4:51 PM, pengyu zhang <address@hidden> wrote:

Hi,

I know that USRP can send out carrier wave at one frequency. For example, a carrier wave at frequency 902MHz. The carrier wave sent is sin(2*pi*902MHz*t). Can we send a carrier wave at three frequencies? For example, a carrier wave at frequency 902MHz, 915MHz, and 928MHz. The carrier wave I want to send is sin(2*pi*902MHz*t)+sin(2*pi*915MHz*t)+sin(2*pi*928MHz*t). Is multi-tone carrier wave feasible given USRP's hardware? How could I implement this on USRP? Thanks.

Pengyu

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--
Muhammad Nazmul Islam

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.


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