OFDM signals are best described in the frequency domain as collection of sub-carriers, each with its information carried in its magnitude and phase. In order to transmit such a composite signal, it must be converted into the time domain. An efficient method of doing this is with an Inverse ...
Sensing of OFDM Signals in Cognitive Radio Systems with Time Domain Cross-CorrelationOFDMcyclic prefixcovariance matrixsignal detectionNeyman-Pearson criterionThis paper proposes an algorithm to sense orthogonal frequency-division multiplexing (OFDM) signals in cognitive radio (CR) systems. The basic idea ...
for iter=1:MaxIter %y_aw=add_AWGN(y_CFO,sig_pow,SNRdB,'SNR',Nbps); % AWGN added, signal power=1 y_aw = awgn(y_CFO,SNRdB,'measured'); % AWGN added, signal power=1 %%%%*** 方案一 ***%%%% %%%%%*** 利用CP进行小数倍频偏估计 Est_FFO_CP = CFO_CP(y_aw,Nfft,Ng); % ...
OFDM signals are best described in the frequency domain as collection of sub-carriers, each with its information carried in its magnitude and phase. In order to transmit such a composite signal, it must be converted into the time domain. An efficient method of doing this is with an Inverse ...
Method and apparatus for diversity receiving OFDM signal by time domain oversamplingThe invention provides a diversity receiving method and device for an OFDM receiver, where the method firstly oversamples OFDM signals in time domain and resamples time-domain signals through interpolation by integral ...
[3] VAN DE BEEK J J,SANDELL M,BORJESSON P O.ML estimation of time and frequency offset in OFDM systems[J].IEEE Transactions on Signal Processing,1997,45(7):1800-1805. [4] SCHMIDL T M,COX D C.Robust frequency and timing synchronization for OFDM[J].IEEE Transactions on Communications,19...
In this paper, a time-domain signal detection algorithm based on second-order statistics (SOS) is proposed for multiple input-multiple output (MIMO)-orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels. A new system model in which the ith received OFDM ...
time-domain oversampling is proposed in this paper.The simulation results show that the proposed algorithm can recover the original data of the sender in the case of low SNR.And the algorithm not only can improve the utilization rate of the frequency resource and signal transmission rate,but ...
[2] Uwaechia A N,Mahyuddin N M.Improved Time-Domain Threshold Determination for Sparse Channel Estimation in OFDM System[C].In 9th International Conference on Robotic,Vision,Signal Processing and Power Applications,2017:175-183. [3] Prasad R,Murthy C R,Rao B D.Joint Channel Estimation And ...
TxDataIfft = TxDataIfftGiNoise(Lcp+1:N+Lcp); % Remove the CP at the received time domain signal TxDataMod = fft(TxDataIfft,N); % Change the time domain to frequency domain % Channel estimation using the pilots: Equation (6) (7) ...