Re: [Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-16 Thread Martin Braun
On 15 Sep 2014 17:34, "Tiankun Hu" wrote: > > Hi Aditya/Martin, > I still looked at rx/tx_ofdm.grc. > Seems there an issue in "ofdm_equalizer_simpledfe.cc line90". > If we use "ofdm_carrier_allocator_cvc_impl.cc" to allocator data and pilot, the d_occupied_carriers[k] and d_pilot_carriers[d_pilot_

Re: [Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-15 Thread Tiankun Hu
Hi Aditya/Martin, I still looked at rx/tx_ofdm.grc. Seems there an issue in "ofdm_equalizer_simpledfe.cc line90". If we use "ofdm_carrier_allocator_cvc_impl.cc" to allocator data and pilot, the d_occupied_carriers[k] and d_pilot_carriers[d_pilot_carr_set][k] shouldn't equal to 1 at the same tim

Re: [Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-07 Thread Tiankun Hu
Aditya/Martin, thanks your help, I will read these references that you mentioned. 在 2014年09月06日 00:31, Aditya Dhananjay 写道: Hi Tiankun, To add on to what Martin said: In DFE, the channel state H_I on subcarrier i is updated everytime it receives a new symbol on that subcarrier. It doesn't rea

Re: [Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-05 Thread Aditya Dhananjay
Hi Tiankun, To add on to what Martin said: In DFE, the channel state H_I on subcarrier i is updated everytime it receives a new symbol on that subcarrier. It doesn't really care of that symbol is a pilot or a data symbol. If it is a pilot, the channel estimate H_i is trivially calculated and updat

Re: [Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-05 Thread Martin Braun
It uses them. It will reset the channel state estimate every time it encounters a pilot symbol. See eg the qa codes for examples. If you want to make use of them in your modem, you need to put pilots on the same carriers as the data. M On 5 Sep 2014 11:01, "Tiankun Hu" wrote: > Hi Aditya, > Than

[Discuss-gnuradio] 回复: references using in ofdm_equalizer_simpledfe

2014-09-05 Thread Tiankun Hu
Hi Aditya, Thanks your time! But how to use pilotes symbol's channel state to update data symbol's? "ofdm_equalizer_simpledfe" is so simple, so it didn't realize that, right? Is there any example or paper can be for reference? Thanks Tiankun -- 原始邮件