function [rxDataModLs] = rx_PilotBlockChanEst(rAddAWGN,WaveformPara,CPset,SysParameters)
N = WaveformPara.N_FFT;
N_Used = WaveformPara.UsedSubcarrier;
L = WaveformPara.CP_Len;
m = WaveformPara.PilotNum;
pnSequence = comm.PNSequence('Polynomial',[8 6 5 4 0], ...
                'SamplesPerFrame',WaveformPara.UsedSubcarrier,'InitialConditions',[0 0 0 0 0 0 0 1]);
    WaveformPara.pilot = generatePilot(pnSequence,1);
pilot = WaveformPara.pilot;

% rxOFDMsym = reshape(rAddAWGN,WaveformPara.SymbolLen,WaveformPara.FrameSymNum);
% rxOFDMcore = rxOFDMsym(L+1:L+N,:);          % 去CP的地方

rxOFDMcore = [];
    % 将矩阵操作转换成对列操作
kk1=1;
for i = 1:length(CPset)
     get_idx = kk1:(kk1 + N + CPset(i)-1);
     currentSym = rAddAWGN(get_idx);
     rxOFDMcore = [rxOFDMcore,currentSym(CPset(i)+1:end)];
     kk1=kk1+(N+CPset(i)); 
end


rxDataModInMatrix = fft(rxOFDMcore,[],1)/sqrt(N);

rxDataModInMatrix_shift = [rxDataModInMatrix(2:2+(N_Used-1)/2-1,:);rxDataModInMatrix(end - (N_Used-1)/2:end,:)];

rxPilot = rxDataModInMatrix_shift(:,1:WaveformPara.PilotInterval+1:WaveformPara.FrameSymNum);

hLs = zeros(N_Used,m);

rxDataRemovPilot = zeros(N_Used,WaveformPara.DataFrame);


for i = 1:m-1
    rxDataRemovPilot(:,(i-1)*WaveformPara.PilotInterval+1:i*(WaveformPara.PilotInterval)) = ...
        rxDataModInMatrix_shift(:,(i-1)*(WaveformPara.PilotInterval+1)+2:i*(WaveformPara.PilotInterval+1));
    hLs(:,i) = rxPilot(:,i)./pilot;
end

rxDataRemovPilot(:,(m-1)*WaveformPara.PilotInterval+1:end) = ...
    rxDataModInMatrix_shift(:,(m-1)*(WaveformPara.PilotInterval+1)+2:end);
hLs(:,m) = rxPilot(:,m)./pilot;



if mod(WaveformPara.DataFrame,WaveformPara.PilotInterval)>0
    hLs = [kron(hLs(:,1:m-1),ones(1,WaveformPara.PilotInterval)),kron(hLs(:,m),ones(1,mod(WaveformPara.DataFrame,WaveformPara.PilotInterval)))];
else
    hLs = kron(hLs(:,1:m),ones(1,WaveformPara.PilotInterval));
end

eqDataModLs = zeros(N_Used,WaveformPara.DataFrame);

for i = 1:WaveformPara.DataFrame
    eqDataModLs(:,i) = rxDataRemovPilot(:,i)./hLs(:,i);
end

rxDataModLs = reshape(eqDataModLs,[],1);

end
%%
function pilot = generatePilot(pnSequence,Power)

    pilot = pnSequence();

    bpskModulator = comm.BPSKModulator;
    pilot = bpskModulator(pilot)*sqrt(Power);
end