WARP Project Forums - Wireless Open-Access Research Platform

You are not logged in.

#1 2008-Nov-14 12:00:50

mikek
Member
Registered: 2008-Nov-14
Posts: 1

WARPLAB Symbol Rate

Using the basic WARPLAB SISO reference design version 2, it seems to take a long time to transmit multiple packets? The m-code in TxRx_Test_warplab_siso_v1.m lists the sample rate at 40MHz, does this imply that the transmitted symbol rate is 5 Mbps in the SISO version 2 if the upsample factor for each symbol is 8?
What is the limiting factor(s) that prevents rapid transmission of multiple packets.

Regards,
Mike

Offline

 

#2 2008-Nov-15 09:24:19

murphpo
Administrator
From: Mango Communications
Registered: 2006-Jul-03
Posts: 5159

Re: WARPLAB Symbol Rate

In that example, the symbol rate is 5Msym/sec (40MHz sampling, 8x rate-change)

WARPLab works by constructing a vector of raw complex samples in MATLAB, then downloading these samples to the WARP node via Ethernet. This download takes a while. Once downloaded, this vector is fed to the radio board's DAC to be transmitted over the air. The WARPLab Rx process is the exact reverse (Radio->ADC->buffer->Ethernet->MATLAB). The Tx/Rx cycle rate is limited by the time required to download and upload vectors of raw complex baseband samples via Ethernet.

Offline

 

Board footer