Receiver Requirements for Realistic Interference Scenarios in Wireless Personal Area Networks
This document discusses the receiver requirements for handling realistic interference scenarios in Wireless Personal Area Networks (WPANs). It covers topics such as second-order distortion, direct conversion receivers, blocker mitigation techniques, and proposals to specify sensitivity levels in the context of interference from WiFi 6E and other sources. The aim is to ensure high-quality receiver designs that can effectively deal with interference while maintaining optimal performance levels.
- Receiver Requirements
- Wireless Personal Area Networks
- Interference Scenarios
- Second-Order Distortion
- Direct Conversion Receivers
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May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Receiver Requirements for Realistic Interference Scenarios Date Submitted: May 11, 2021 Source: T. McKay (GLOBALFOUNDRIES) Contact: Voice: +1 408 395 7207, E-Mail: tgmckay@ieee.org Re: Study Group 4ab: UWB Next Generation Abstract: Consideration of receiver requirements for Realistic Interference Scenarios Purpose: Assist in developing technical content Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. T. McKay (GLOBALFOUNDRIES)
May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Receiver Requirements for Realistic Interference Scenarios T. McKay tgmckay@ieee.org IEEE Sr. Member, 2014 T. McKay (GLOBALFOUNDRIES) Slide 2
May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Motivation WiFi 6E FCC TX Power Ruling Threatens Use of UWB Channel 5 Completely May Impact Cost of Channel 9-only implementations due to roofing filter requirements Ultra-Wideband receiver 2nd order distortion may cause link loss due to modulated interferers Quality receiver designs can achieve high second order intercept through mixer calibration D. Kaczman et al., A single-chip 10-band WCDMA/HSDPA 4-band GSM/EDGE SAW-less CMOS receiver with DigRF 3G interface and +90 dBm IIP2, IEEE J. Solid-State Circuits, vol. 44, no. 3, pp. 718 739, Mar. 2009. Added power consumption likely can be made negligible T. McKay (GLOBALFOUNDRIES) Slide 3
May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Background Direct Conversion Receivers are Simple, Low Cost, Fully Integrable in CMOS Second-order distortion (IP2) of Direct Conversion Receiver Maps CW Blocker to DC at IF Relatively easy to mitigate this effect Existing vendors have established de facto standard AM Modulated Blocker to Noise in IF May not be so easy to mitigate For basic lineup calculations, see, for example https://www.analog.com/en/technical-articles/understanding-ip2-and- ip3-issues-in-direct-conversion-receivers.html T. McKay (GLOBALFOUNDRIES) Slide 4
May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Proposal Follow 802.11 by specifying sensitivity Is anything specified in 802.15.4 now? blocking - CW is def acto blocking - Modulated Work plan to identify practical scenarios of value and identify a minimum requirement Blocker Power vs. Distance from WiFi 6E APs Other important scenarios Anticipate that elaborate mitigation schemes would drive power consumption up Focus on requiring quality (not costly) RF/Analog hardware to protect the standard T. McKay (GLOBALFOUNDRIES) Slide 5
May 13, 2021 doc: IEEE 802.15-21-0276-00-04ab Thank You T. McKay (GLOBALFOUNDRIES) Slide 6
