 comes as a matrix multiply between received samples over Rx antennas and MMSE weights. As such, computational complexity per symbol is estimated as Ncarrier X Nantenna Nlayer 1 carrier X 3276 subcarriers/received symbol X 8 received antennas X 4 layers X 2000 slot/second X 10 symbols = 2097 MCMAC/s or 8388 MRMAC/s. Demodulation. In this step, the output of the channel equalization phase is converted to Log Likelihood Ratios (LLRs), where the number of LLRs equals the log2 of modulation order. The complexity depends on the modulation order and scales with Ncarrier X Nlayer Complexity per LLR assumed to be 3 real operations (alpha X N - |Li|) as per 3GPP standards. 1 carrier X 3276 subcarriers X 4 layers X 8 LLR [256 quadrature amplitude modulation (QAM)] X 3 real operations X 2000 slot/second X 10 symbols = 6290 MROPS/s. PRACH is assumed to follow a regular frequency domain correlation processing flow for short sequence. Symbol FFT is assumed to be performed in Remote Radio Head (RRH) as explained earlier. Rest of the processing is assumed to be done in DU following breakdown given next, leading to a total of 1876 MROPS. It is also assumed that PRACH is processed within a slot, but larger latency might be acceptable leading to lower average complexity. Frequency Domain Root Sequence Correlation: 1 carrier X 8 received antennas X 2 PRACH preambles X 6 PRACH occasions X 1 PRACH slot per subframe X 139 sequence length X 2000 slot/second = 27 MCMAC/s or 107 MRMAC/s IFFT: 1 carrier X 8 received antennas X2 PRACH preambles X 6 PRACH occasions X 1 PRACH slot per subframe 256 log2(256) IFFT size X 2000 slot/second = 393 MCMAC/ S or 1573 MRMAC/s preamble coherent combining: 1 carrier X 8 received antennas X 2 PRACH preambles X 6 PRACH occasions X 1 PRACH slot per subframe X 256 IFFT size X 2000 slot/second = 49 MCADD/s or 98 MRADD/s power computation and antenna noncoherent combining: 1 carrier X 8 received antennas X 6 PRACH occasions X 1 PRACH slot per subframe X 256 IFFT size X 2 operations (12 + Q2) X 2000 slot/second