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Phase Noise Sensitivity of HRb OFDM

Phase Noise Sensitivity of HRb OFDM. Paul Chiuchiolo and Mark Webster Intersil Corporation. Non-Ideal PA Effects for OFDM. PER with Phase Noise 20kHz 3dB Bandwidth 1, 2 and 4 degrees RMS Using model in document 296r1 6.6, 13.2, 26.4 and 59.4 Mbps tested 1000 byte packets

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Phase Noise Sensitivity of HRb OFDM

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  1. Phase Noise Sensitivity ofHRb OFDM Paul Chiuchiolo and Mark Webster Intersil Corporation Paul Chiuchiolo and Mark Webster, Intersil

  2. Non-Ideal PA Effects for OFDM • PER with Phase Noise • 20kHz 3dB Bandwidth • 1, 2 and 4 degrees RMS • Using model in document 296r1 • 6.6, 13.2, 26.4 and 59.4 Mbps tested • 1000 byte packets • Subcarrier Amp/Phz Estimated over Packet (non-ideal) • Assumptions • Tracking loop disabled Paul Chiuchiolo and Mark Webster, Intersil

  3. Basis of Phase Noise Model F3dB freq freq PLL Trk Resp. -20 dB/dec VCO dBc/Hz +20 dB/dec F3dB freq 2nd-order PLL Actual: VCO Composite -20 dB/dec 1st-order LPF Model: AWGN F3dB freq freq 1st- order LPF AWGN PSD -20 dB/dec Paul Chiuchiolo and Mark Webster, Intersil

  4. Equivalent Noise BW of 1-pole Butterworth Filter used for phase noise. R C Paul Chiuchiolo and Mark Webster, Intersil

  5. Compute RMS Phase Noise as Function of Flat SSB Power Pssb dB F3dB freq Pssb dB Phase Noise -20 dB/dec Paul Chiuchiolo and Mark Webster, Intersil

  6. Phase Noise Utility: BW = 10 KHz and RMS PN = 1 degree Target RMS phz error (degrees): 1.805916e+000 Estimated RMS phz error (deg) using 100000 samples: 1.732820e+000 Paul Chiuchiolo and Mark Webster, Intersil

  7. Phase Noise with 64 QAM(10 KHz loop bandwidth) 1 degree RMS 4 degrees RMS 35.6 dB SDR 23.5 dB SDR Paul Chiuchiolo and Mark Webster, Intersil

  8. PER for 6.6 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

  9. PER for 13.2 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

  10. PER for 26.4 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

  11. PER for 59.4 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

  12. 10% PER Degradation Rate Mbps 1 deg 2 deg 4 deg 6.6 ~ 0 dB ~ 0 dB 0.1 dB 13.2 ~ 0 0.1 0.25 26.4 ~ 0 0.2 0.8 59.4 0.2 1.5 -- Paul Chiuchiolo and Mark Webster, Intersil

  13. Conclusions • Phase noise performance shown • Sub-carrier amp/phase was estimated • Phase noise tracking techniques not examined • Performance looks acceptable Paul Chiuchiolo and Mark Webster, Intersil

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