phase noise sensitivity of hrb ofdm n.
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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

Phase Noise Sensitivity ofHRb OFDM

Paul Chiuchiolo and Mark Webster

Intersil Corporation

Paul Chiuchiolo and Mark Webster, Intersil

non ideal pa effects for ofdm
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
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

equivalent noise bw of 1 pole butterworth filter used for phase noise
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 p ssb db
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
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
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
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
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
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
PER for 59.4 Mbps with Phase Noise

1000 byte

Packets

Paul Chiuchiolo and Mark Webster, Intersil

10 per degradation
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
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