Fronthaul bandwidth calculation

Fronthaul Bandwidth Formula

Fronthaul bandwidth for the O-RAN 7.2x split depends on the number of antenna ports, component carrier bandwidth, IQ sample bit width, and protocol overhead. The base calculation multiplies the number of subcarriers by the number of OFDM symbols per millisecond by the IQ sample width by the number of antenna layers by two for I and Q components. For a 100 MHz NR carrier with 3300 active subcarriers at 30 kHz SCS, fourteen symbols per slot at one millisecond periodicity, sixteen-bit samples, and four spatial layers, the raw IQ data rate is approximately 9.8 Gbps per direction. Adding eCPRI…