Florian Kaltenberger
731f75c594
updated llr scaling for PDCCH and PDSCH in TM5 initialized all newly allocated memory to 0 in new_eNB/UE_ulsch/dlsch and setting pointers to 0 after freeing memory in free_eNB/UE_ulsch/dlsch some small modifications related to EMOS (from the MU-MIMO measurement campaign) git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4480 818b1a75-f10b-46b9-bf7c-635c3b92a50f
126 lines
3.0 KiB
Matlab
126 lines
3.0 KiB
Matlab
clear all
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close all
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card=0;
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limeparms;
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freq_rx = 1907600000*[1 1 1 1];
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%freq_rx = 700600000*[1 1 1 1];
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%freq_rx = 748000000*[1 1 1 1];
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freq_tx = freq_rx+1920000;
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rxgain = 30*[1 1 1 1];
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txgain = 0*[1 1 1 1];
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tdd_config = DUPLEXMODE_FDD + TXRXSWITCH_LSB;
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syncmode = SYNCMODE_FREE;
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rf_local = [8254813 8255016 8254813 8254813]; % from the tx calibration
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%rf_local = [8255842 8255064 8257340 8257340]; % 700MHz
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%rf_local = [8256776 8255788 8257340 8257340]; % 850MHz
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rf_rxdc = rf_rxdc*[1 1 1 1]; % initial value
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rf_vcocal= rf_vcocal_19G*[1 1 1 1];
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rffe_rxg_low = 31*[1 1 1 1];
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rffe_rxg_final = 31*[1 1 1 1];
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rffe_band = B19G_TDD*[1 1 1 1];
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sleepafterconfig=0.2
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% coarse calibration loop for both rx chains
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for ant=1:4
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rf_mode = zeros(1,4);
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rf_mode(ant) = (RXEN+0+TXLPFNORM+TXLPFEN+TXLPF25+RXLPFNORM+RXLPFEN+RXLPF25+LNA1ON+LNAMax+RFBBNORM+DMAMODE_RX+0);
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dc_off_re_min = 99999;
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dc_off_im_min = 99999;
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stepsize = 64;
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rxdc_Q_s = 0;
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rxdc_I = 0;
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while (stepsize>=1)
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stepsize = stepsize/2;
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if (rxdc_I<0)
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rxdc_I_s = 64+abs(rxdc_I);
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else
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rxdc_I_s = rxdc_I;
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end
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rf_rxdc = ((128+rxdc_I_s) + (128+rxdc_Q_s)*(2^8))*[1 1 1 1];
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oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rxgain,txgain,0,rf_mode,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band);
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sleep(sleepafterconfig)
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s=oarf_get_frame(card);
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figure(1)
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plot(real(s));
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ylim([-2048 2048]);
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drawnow;
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%sF0 = 20*log10(abs(fftshift(fft(s(:,1)))));
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%sF1 = 20*log10(abs(fftshift(fft(s(:,2)))));
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%f = (7.68*(0:length(s(:,1))-1)/(length(s(:,1))))-3.84;
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%spec0 = sF0;
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%spec1 = sF1;
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rxdc_I
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rxdc_I_s
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dc_offset = mean(s(:,ant));
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fflush(stdout);
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if (abs(real(dc_offset))<dc_off_re_min)
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dc_off_re_min = abs(real(dc_offset));
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rxdc_I_min(ant) = rxdc_I_s;
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end
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if (real(dc_offset)>0)
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rxdc_I = rxdc_I+stepsize;
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else
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rxdc_I = rxdc_I-stepsize;
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end
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end
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stepsize = 64;
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rxdc_Q = 0;
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while (stepsize>=1)
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stepsize = stepsize/2;
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if (rxdc_Q<0)
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rxdc_Q_s = 64+abs(rxdc_Q);
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else
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rxdc_Q_s = rxdc_Q;
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end
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rf_rxdc = ((128+rxdc_I_s) + (128+rxdc_Q_s)*(2^8))*[1 1 1 1];
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oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rxgain,txgain,0,rf_mode,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band);
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sleep(sleepafterconfig)
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s=oarf_get_frame(card);
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figure(2)
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plot(imag(s));
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ylim([-2048 2048]);
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drawnow;
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%sF0 = 20*log10(abs(fftshift(fft(s(:,1)))));
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%sF1 = 20*log10(abs(fftshift(fft(s(:,2)))));
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%f = (7.68*(0:length(s(:,1))-1)/(length(s(:,1))))-3.84;
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%spec0 = sF0;
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%spec1 = sF1;
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rxdc_Q
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rxdc_Q_s
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dc_offset = mean(s(:,ant));
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fflush(stdout);
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if (abs(imag(dc_offset))<dc_off_im_min)
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dc_off_im_min = abs(imag(dc_offset));
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rxdc_Q_min(ant) = rxdc_Q_s;
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end
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if (imag(dc_offset)>0)
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rxdc_Q = rxdc_Q+stepsize;
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else
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rxdc_Q = rxdc_Q-stepsize;
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end
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end
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end
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rxdc_I_min
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rxdc_Q_min
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rf_rxdc_min = ((128+rxdc_I_min) + (128+rxdc_Q_min)*(2^8)) |