Phase Noise Sensitivity of HRb OFDM November 2000 Phase Noise Sensitivity of HRb OFDM Paul Chiuchiolo and Mark Webster Intersil Corporation Paul Chiuchiolo and Mark Webster, Intersil

Non-Ideal PA Effects for OFDM November 2000 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

Basis of Phase Noise Model November 2000 Basis of Phase Noise Model F3dB freq freq PLL Trk Resp. VCO dBc/Hz -20 dB/dec +20 dB/dec F3dB freq 2nd-order PLL Actual: VCO Composite -20 dB/dec Model: 1st-order LPF AWGN F3dB freq freq 1st- order LPF AWGN PSD -20 dB/dec Paul Chiuchiolo and Mark Webster, Intersil

Equivalent Noise BW of 1-pole Butterworth Filter used for phase noise. November 2000 Equivalent Noise BW of 1-pole Butterworth Filter used for phase noise. R C Paul Chiuchiolo and Mark Webster, Intersil

Compute RMS Phase Noise as Function of Flat SSB Power Pssb dB November 2000 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

Phase Noise Utility: BW = 10 KHz and RMS PN = 1 degree November 2000 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

Phase Noise with 64 QAM (10 KHz loop bandwidth) November 2000 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

PER for 6.6 Mbps with Phase Noise November 2000 PER for 6.6 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

PER for 13.2 Mbps with Phase Noise November 2000 PER for 13.2 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

PER for 26.4 Mbps with Phase Noise November 2000 PER for 26.4 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

PER for 59.4 Mbps with Phase Noise November 2000 PER for 59.4 Mbps with Phase Noise 1000 byte Packets Paul Chiuchiolo and Mark Webster, Intersil

10% PER Degradation Rate Mbps 1 deg 2 deg 4 deg November 2000 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

Conclusions Phase noise performance shown November 2000 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