Mega Hertz, Mega Samples, Mega bits, Mega Confusing
summary
Concrete claims and numbers cut through the buzz: examples use SSB FSK QPSK OFDM and show how interpolation/decimation turn a 30 MS/s vs 245 MS/s stream into a clean first Nyquist band, how LTE’s occupied bandwidth 9 MHz vs channel 10 MHz maps to a 15.36 MS/s sample rate then a 5× interpolation to 25 MHz for DPD, and how JESD204 line rates produce 491.52 Mbps per lane for 122.88 MS/s IQ. DPD needs ~5× feedback bandwidth, ADALM‑PLUTO buffering (128 MB → ~61 s at low rates) enables capture, and careful calibration yields instrument‑grade power and frequency accuracy.
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chapters (6)
- 0:00Start
- 4:58Bandwidth or Tuning Range
- 5:41Pre-Distortion
- 7:15Difference between Occupied Bandwidth and Channel Bandwidth
- 14:27Basic Dpd System
- 24:33Dbm
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