How do I design the RF filtering for a 5G NR base station to meet blocking requirements?

How do I design the RF filtering for a 5G NR base station to meet blocking requirements? The 5G NR blocking specification (3GPP TS 38.104) defines the maximum interfering signal levels that the base station receiver must tolerate without degrading the desired signal reception: (1) Blocking scenarios: in-band blocking: an interfering signal within the operating band but outside the desired channel. The BS must tolerate an in-band blocker of -43 dBm to -15 dBm (depending on the frequency offset) without sensitivity degradation > 6 dB. Out-of-band blocking: an interfering signal outside the operating band. The BS must tolerate -15 dBm blockers at frequencies > 20 MHz outside the band edge. Narrow-band blocking (co-location): a strong CW interferer at -15 dBm within the guard band. This tests the receiver ADC linearity and filter rejection. (2) Filter design to meet blocking: the RF bandpass filter must: pass the desired channel with minimal insertion loss (< 1.5 dB), reject in-band blockers by the ratio needed to keep the blocker below the ADC full-scale minus the required dynamic range, and reject out-of-band blockers to protect the LNA and mixer from saturation. Filter selectivity: the filter skirt (transition from passband to stopband) must be steep enough to reject blockers at the specified offsets. For n78 (3.3-3.8 GHz): the filter must pass 500 MHz with < 1.5 dB IL and reject signals at 3.8 GHz + 20 MHz = 3.82 GHz by > 40 dB. This requires a filter Q of > 500 (achievable with cavity filters). (3) ADC dynamic range: the ADC must digitize both the desired signal (near sensitivity) and the in-band blocker (up to -15 dBm) simultaneously. Required dynamic range: REFSENS - blocker_level = -95.8 - (-15) = 80.8 dB. Plus ADC margin (SFDR, headroom): add 10-15 dB. Total ADC dynamic range: 90-96 dB (corresponding to 15-16 bits). In practice: 14-16 bit ADCs at 200+ Msps are used for 5G base stations. (4) LNA protection: the LNA must not compress or generate excessive IMD in the presence of blockers. LNA P1dB should be > blocker power + 10 dB margin = -15 + 10 = -5 dBm. LNA OIP3 should be > -5 + 10 = +5 dBm (minimum). Bypass or attenuation: some designs include an LNA bypass mode for very strong blocker conditions (sacrificing NF to avoid compression).