|Subject:||Re: [Discuss-gnuradio] sampling rate of tx_sampless.cc and rx_streaming_sampless.cc|
|Date:||Thu, 15 Apr 2010 11:51:10 +0530 (IST)|
It is for UMTS based standard LTE (20MHz bandwidth) which has 30.72Msps and this is beyond USRP2's instantaneous bandwidth (25MHz). I am simulating LTE (10MHz bandwidth) where I can halve the sampling rate of 15.36Msps. Reading the earlier mail threads and responses from Matt I understand that it is better to handle the sample rate converters at the software level rather than doing at the FPGA level in the USRP2 code.
LTE is based on OFDM and is not using any spectral shaping filter, instead the samples generated for OFDM symbols at the above rate are directly read/write into DAC/ADC. I could successfully do the above by performing downlink and uplink using interpolation factor 16 which boils down to 6.25Msps but when I used the interpolation factor 6 (or 8) it gives the overflowing errors. I am using Quadcore PC (2.6GHz), can you suggest any other high end PC that can handle the above processing?
--- On Fri, 9/4/10, John Orlando <address@hidden> wrote:
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