mirror of https://github.com/PentHertz/srsLTE.git
18 lines
506 B
Matlab
18 lines
506 B
Matlab
function cfo = cfo_estimate_cp(input_slot, Nsyms, sym_len, cp0_len, cp_len)
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% Start correlating from the end. Nsyms is the number of symbols to
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% correlate starting from the end.
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s=length(input_slot)-sym_len-cp_len;
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e=length(input_slot)-sym_len;
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for i=1:Nsyms
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r(i)=sum(input_slot(s:e).*conj(input_slot(s+sym_len:e+sym_len)));
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if (i < 7)
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s=s-sym_len-cp_len;
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e=e-sym_len-cp_len;
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else
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s=s-sym_len-cp0_len;
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e=e-sym_len-cp0_len;
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end
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end
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cfo=-angle(mean(r))/pi; |