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Simple Model for Phase Noise Impairment for TGn Comparison Criterion

This paper presents a simple model for phase noise impairment in TGn comparison criterion, addressing objections to the current IM4 and recommending a lowpass filter model with floor based on published data.

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Simple Model for Phase Noise Impairment for TGn Comparison Criterion

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  1. Simple Model for Phase Noise Impairment for TGn Comparison Criterion Colin Lanzl Aware, Inc. 40 Middlesex Turnpike, Bedford, MA 01730-1432 +1-781-687-0578 clanzl@aware.com Colin Lanzl, Aware

  2. Objections to current IM 4 • Current text for IM4 was never agreed in full TGn; • Phase noise parameters not supported by published data; • Phase noise impairment does not sufficiently stress proposals; • There is an easier way… Colin Lanzl, Aware

  3. Analytical Expression for Phase Noise as Filtered Gaussian Noise superimposed on tone • Gaussian noise filtered by lowpass-equivalent filter with floor: PSD(f) = PSDplateau[ 1/(1+f/fcor)2 ] + PSDfloor • fcor= corner frequency • PSDplateau = Phase noise power spectral density close to carrier • PSDfloor = Phase noise power spectral density floor very far from carrier Colin Lanzl, Aware

  4. References for Data • I. Bouras, S. Bouras, T.Georgantas, N. Haralabidis, G. Kamoulakos, C. Kapnistis, S. Kavadias, Y. Kokolakis, P. Merakos, J.Rudell, S. Plevridis, I. Vassiliou, K. Vavelidis, A. Yamanaka "A Digitally Calibrated 5.15-5.825GHz Transceiver for 802.11a Wireless LANs in 0.18um CMOS", Proc. 2003 IEEE Conf. Solid State Circuits, paper 20.2 (Athena ’03) • Pengfei Zhang, Thai Nguyen, Chris Lam, Doug Gambetta, Chet Soorapanth, Baohong Cheng, Siegfried Hart, Isaac Sever, Taoufik Bourdi, Andrew Tham, Behzad Razavi, "A Direct Conversion CMOS Transceiver for IEEE 802.11a WLANs", Proc. 2003 IEEE Conf. Solid State Circuits, paper 20.3 (Resonext ’03) • David Su, Masoud Zargari, Patrick Yue, Shahriar Rabii, David Weber, Brian Kaczynski, Srenik Mehta, Kalwant Singh, Sunetra Mendis, Bruce Wooley, "A 5GHz CMOS Transceiver for IEEE 802.11a Wireless LAN", Proc. 2002 IEEE Conf. Solid State Circuits, paper 5.4 (Atheros ’02) Colin Lanzl, Aware

  5. Published Single-Sided Phase Noise Data with Analytical Fit Colin Lanzl, Aware

  6. Fit Parameters PSDplateau = -94dBc/Hz fcor= 150kHz PSDfloor = -130dBc/Hz Colin Lanzl, Aware

  7. Recommendation • If we must have a phase noise impairment (applied both to Tx and Rx radios), then it should be something that stresses proposals; • Should be supported by published 5GHz work; • Proposal: simple, lowpass filter model with floor, use fit parameters on previous slide. Colin Lanzl, Aware

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