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Table 1 The number of multiplications required in the operations for the interference term reconstruction at each branch per iteration of the proposed scheme

From: Iterative detection for frequency-asynchronous distributed Alamouti-coded (FADAC) OFDM

Operation Number of multiplications
IFFT input vector generation N
IFFT for time domain conversion \(\frac {N}{2} {\log }_{2} N\)
N-point complex sinusoid multiplication N
FFT for the original OFDM demodulation \(\frac {N}{2} {\log }_{2} N\)
Total 4N+2N log2N