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[Discuss-gnuradio] Re: OFDM implementation
From: |
KC Huang |
Subject: |
[Discuss-gnuradio] Re: OFDM implementation |
Date: |
Fri, 22 Jun 2007 16:29:31 -0400 |
User-agent: |
KMail/1.9.6 |
Hi:
Why I run the benchmark_ofdm and there is a warning like below?
gr_buffer::allocate_buffer: warning: tried to allocate
20 items of size 1600. Due to alignment requirements
64 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
And, the program stops!
Does anyone knows what do I miss?
Thanks!!
KC
>
> Message: 1
> Date: Wed, 13 Jun 2007 22:40:20 -0700 (PDT)
> From: ismail_itee_uq <address@hidden>
> Subject: Re: [Discuss-gnuradio] OFDM implementation
> To: address@hidden
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset=us-ascii
>
>
> I've checked out the latest version (5772) and tried running the
> benchmark_ofdm files. The benchmark_ofdm.py and ofdm_benchmark_tx.py seem
> to be working. But when I use the benchmark_ofdm_rx.py I get the following
> error:
>
> python: gr_ofdm_correlator.cc:105: gr_complex
> gr_ofdm_correlator::coarse_freq_comp(int, int): Assertion `symbol_count <=
> 1000' failed.
> Aborted (core dumped)
>
>
> Currently I'm using two USRPs on one PC and tried transmitting across the
> air. (I modified the benchmark_rx with 'which=1'). I ran the scripts as
> follows:
> ./benchmark_ofdm_rx.py -f2.45e9 -d100
> ./benchmark_ofdm_tx.py -f2.45e9 -i200 --tx-ampl=200
>
> I hope you can give me some pointers to solve this.
>
> -Ismail
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