Doc.: IEEE 802.11-04/0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 1 Thoughts on TX Spectral Masks for 802.11n Christopher J. Hansen.

Slides:



Advertisements
Similar presentations
© 2004, B ROADBAND Physics, Inc. All Rights Reserved. Innovation Through Mathematics Call for Interest on Broadband Over Power Lines 7 June 2004, Denver.
Advertisements

Doc.:802.19/0016r0 Submission Apr 2009 Richard Paine, SelfSlide 1 TV Whitespace Coexistence Use Cases Date: Authors:
Legacy Coexistence – A Better Way?
Doc.: IEEE /001r0 Submission January 2003 Joe Houle, AT&TSlide 1 A Service Provider View of QoS Needs for Hot Spot and Public Venues Joe Houle.
Doc.: IEEE /220r0 Submission March 2002 A. Batra et al., Texas InstrumentsSlide 1 Proposal for a 4 Channel Option to Increase Capacity in the.
Doc.: IEEE /320r0 Submission May 2002 Gerhard Fettweis, Systemonic AGSlide 1 ¼ Giga-Bit/s WLAN Gerhard Fettweis Gunnar Nitsche Systemonic AG.
1 IEEE MBWA Standard Project Contribution: C xx Date: May RF Performance Evaluation Criteria Dan Gal
Simulation and Evaluation of Various Block Assignments Evaluation of multiple carriers deployed in a channel block evaluation criteria section.
Doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Doc.: IEEE xxx a Submission May 2005 Zafer Sahinoglu, Mitsubishi Electric Research Labs Slide 1 Project: IEEE P Working Group for Wireless.
Doc.: IEEE /081r0 Submission January 2001 Shoemake, Texas InstrumentsSlide 1 Project: IEEE P Working Group for Wireless Personal Area Networks.
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANS) Submission Title: [Staccato UWB PHY Proposal for TG4a] Date Submitted:
Doc: IEEE /0360r0 Submission July 2004 K. Siwiak, TimeDerivative, Inc.Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks.
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANS) Submission Title: [Staccato UWB PHY Proposal for TG4a] Date Submitted:
WiFi-NC: WiFi over Narrow Channels
Doc.: IEEE /0015r2 Submission January 2004 Yang-Seok Choi et al., ViVATOSlide 1 Comments on Ergodic and Outage Capacity Yang-Seok Choi,
Technical discussion on Re-channelization Proposal for DSRC band coexistence Date:
Doc.: IEEE /1062r2 Submission Zhendong Luo, CATR September 2010 RF Feasibility of 120 MHz Channelization for China Date: Authors: Slide.
Doc.: IEEE wng/1238r0 Submission November 2010 Alex Reznik, Tanbir Haque (InterDigital)Slide 1 Digital RF Transceiver To Meet Needs of Emerging.
Doc.: IEEE /0346 Submission March 04 Niels van Erven, 3ComSlide 1 Proposal how to measure RF sensitivity for WPP Niels van Erven 3Com.
Doc.: IEEE /543r0 Submission April 2006 Richard van Nee, Airgo NetworksSlide 1 Transmitter CCA Issues in 2.4 GHz April /543r0 Richard van.
Doc.: IEEE /1255r0 Submission TX Mask for Noncontiguous 160 MHz Date: Youhan Kim et al.Slide 1 Authors: November 2010.
Increased Network Throughput with Channel Width Related CCA and Rules
Doc.: IEEE /792r1 Submission Slide 1 André Bourdoux (IMEC) July 2004 Transmit processing: a viable scheme for MIMO-OFDM in n André Bourdoux.
Doc.: IEEE /0668r7 SubmissionMatt Fischer, Broadcom TX Mask Shoulders vis-à-vis ACI Date: Authors: May 2011 Slide 1.
Doc.: IEEE /0613r0 Submission May 2012 Ron Porat, Broadcom US Channelization Date: Authors: Slide 1.
Doc.: IEEE /1516r0 Submission November 2011 Huai-Rong Shao, et.al. Samsung ElectronicsSlide ah Channelization Proposal for US Date:
January 6, 2002doc.: IEEE /044r0 SubmissionRishi Mohindra, MAXIMSlide 1 Proposal for IEEE802.11g Receiver Adjacent Channel Rejection Requirement.
Submission doc.: IEEE 11-14/0353r0 March 2014 Dongguk Lim, LG ElectronicsSlide 1 Suggestion on PHY Abstraction for Evaluation Methodology Date:
Suggested PA Model for HRb
Doc.: IEEE /0785r0 Submission July 2009 Eldad Perahia, Intel CorporationSlide 1 Investigation of PA Model Sample Rate for TGac Date:
Doc.: IEEE /0018r0 Submission May 2004 Steve Shellhammer, Intel CorporationSlide 1 IEEE Wireless Coexistence TAG Steve Shellhammer
Doc.: IEEE /1421r0 Submission November 2012 Rich Kennedy, Research In MotionSlide 1 TGaf Response to CA Comments Date: Authors:
Doc.: IEEE /531 Submission July 2003 Hart/Skellern CiscoSlide 1 EVM vs PER Plot Not Promising for PSNI Brian Hart, David Skellern (Cisco Systems)
Doc.: IEEE /286r0 Submission May 2001 Shoemake and Batra, TI Range vs. Rate Comparison of Remaining IEEE g Proposals: PBCC and CCK-OFDM.
Doc.: IEEE /1342r1 Submission November 2010 Matthew Fischer, BroadcomSlide 1 Spectral Mask Absolute vs Relative Date: Authors:
Doc.: IEEE /443r0 Submission October 2001 Anuj Batra, Texas InstrumentsSlide 1 Project: IEEE P Working Group for Wireless Personal Area.
Doc.: IEEE /0587r0 Submission May 2009 Vinko Erceg, BroadcomSlide 1 40MHz BT Over the Air Demonstration Date: Authors:
Doc.: IEEE /108r0 Submission January 2003 Adrian Stephens, IntelSlide 1 Some proposed motions for HT SG Adrian P Stephens
Submission doc.: IEEE 11-12/771r0 July 2012 Jarkko Kneckt, NokiaSlide 1 FILS STA Support for QoS, HT and VHT? Date: Authors:
Doc.: IEEE /0309r1 Submission March 2012 Hongyuan Zhang, et. Al.Slide 1 1MHz Waveform in Wider BW Date: Authors:
Doc.: IEEE /1234r0 Submission November 2009 Sameer Vermani, QualcommSlide 1 Interference Cancellation for Downlink MU-MIMO Date: Authors:
Doc.: IEEE r0 Submission September 2005 Jim Lansford, AlereonSlide 1 Project: IEEE P Working Group for Wireless Personal Area Networks.
Submission doc.: IEEE 11-13/1440r0 November 2013 Clayton Shepard, Rice UniversitySlide 1 Argos | Practical Massive-MIMO Date: Authors:
Doc.: IEEE /0772r0 Submission July 2004 J. Boer, J. Gilbert, E. Perahia, J. Sadowsky, N. Waes, W. Houtum, T. Kunihiro, M. Takagi Slide 1 40 /
Submission doc.: IEEE /0148r0 Nokia Internal Use Only January 2012 Chittabrata Ghosh, Nokia Slide 1 Date: Authors: Uplink Throughput.
Doc.: IEEE p Submission September 2008 Carl Kain, Noblis (USDOT) Response to Comments on Optional Enhanced ACR and AACR Values Date:
Doc.: IEEE /283 Submission Sept/00 M. Webster and K. HalfordSlide 1 Spectral Mask Considerations for HRb Mark Webster and Karen Halford.
Doc.: IEEE /383 Submission November1998November 1998 Jamshid Khun-Jush, ETSI-BRANSlide 1 BRAN#11 PHY Decisions & Issues to Resolved with
Doc.: IEEE /0889r0 Submission June 2014 Nihar Jindal, Broadcom Performance Gains from CCA Optimization Date: Authors: Slide 1.
Doc.: IEEE /1062r0 Submission Zhendong Luo, CATR September 2010 RF Feasibility of 120 MHz Channelization for China Date: Authors: Slide.
Doc.: IEEE m SubmissionSlide 1 September 2012 Project: IEEE P Working Group for Wireless Personal Area Networks(WPANs) Submission.
Simulation Data for Letter Ballot Comments on Quasi-guard Subcarriers and Reverse Link Waveform Lai King (Anna) Tee January 15, 2007.
Doc.: IEEE /0024r0 Submission Feedback on 3GPP CRs: LAA Multi-Channel Access and Energy Detect (ED) Coexistence Slide 1 Date: Authors:
Doc.: IEEE /0039r2 Submission Nov 2010 Raja Banerjea, Marvell SemiconductorSlide 1 Transmit Spectral Mask Changes Date: Authors:
Doc.: IEEE /418 Submission November 2000 Niels Van Erven, 3ComSlide 1 Suggested Approach for 22 Mbps b Implementation Niels Van Erven 3Com.
IEEE n Submission Andy Bottomley (Microsemi) Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission.
Channelization for HRb OFDM
TX Masks Date: Authors: January 2017
60 GHz Cubicle Wall Reflectivity
Proposed response to 3GPP ED request
PPM Sensitivity of 10 MHz OFDM Channels
80-MHz Non-Contiguous Channel Spectrum
doc.: IEEE <doc#>
Spectral Control Issues for TGg
Transmit Spectral Mask Changes
doc.: IEEE <doc#>
Text proposal for using receiver information
80-MHz Non-Contiguous Channel Spectrum
RF Feasibility of 120 MHz Channelization for China
Presentation transcript:

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 1 Thoughts on TX Spectral Masks for n Christopher J. Hansen Broadcom Corporation

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 2 TX Spectral Masks for n Overview.11a/.11g mask for 20 MHz OFDM Limitations of this mask Suggested masks for 20 and 40 MHz.11n Adjacent Channel Performance

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 3 Why Spectral Masks are Important Spectral masks limit interference to adjacent channels –promotes: interoperability, coexistence, and system capacity The out of band mask places a lower bound on interference levels in receivers regardless of implementation. –Interference energy appears on top of the desired signal. –Goal to make out of band interference as small as possible subject to practical constraints.

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide a/.11g OFDM Mask In band Transition Floor

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 5 Key Parameters for Masks 3 Regions –In Band encompasses the desired signal As close to channel bandwidth as feasible –Transition bounds adjacent channel interference limited by baseband / IF bandwidth post IF inter-modulation distortion (IMD) –Floor bounds other channel interference Outside range of filter and IMD limits limited by local oscillator phase noise

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 6 Transition Region Transition region determined by TX non-linearity –Assume IMD in TX path is dominated by 3rd order compressive non-linearity (higher order terms << 3rd order term): –y(t) = x(t) - f(Ax 3 (t)) x(t) is ideal, time domain OFDM signal, f(t) is a bandpass filter to remove harmonic components –A = 4/3 (1/OIP 3 ) 2 OIP 3 is the 3rd order intercept point in absolute units –Y(f) = X(f) - AX(f)*X(f)*X(f) Double convolution expands bandwidth into adjacent channels Y(f) is the frequency domain representation of the resulting signal Intermodulation distortion will expand the bandwidth of the resulting signal

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 7 Transition Region Example –Roll off shoulder height determined by IMD level –Slope is 6 dB per octave close in; falls off to zero at 3 times signal bandwidth Ideal Signal Spectrum Intermodulation Distortion

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 8 Mask Floor Floor region is limited by oscillator phase noise (assuming no sharp filtering at IF) Transmitted signal –baseband signal x(t) modulated by carrier at f 0 and phase noise –Power spectral density of desired signal:

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 9 Mask Floor PSD of the phase noise corrupted signal is the convolution of the ideal signal PSD and the phase noise PSD: For the phase noise levels and of interest, the phase noise spectrum floor is almost exactly equal to L (f), the phase noise spectrum in one sideband (IEEE Std ) At 10 MHz or more from the carrier, phase noise spectrum is relatively flat Acheivable floor in dBr is L (f) * Signal Bandwidth (assume 18 MHz for.11a) –.11a floor of -40 dBr requires L (f) of dBc/Hz

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 10 Limitations of the a TX Mask.11a Mask –Adjacent channel signal approximately 25.9 dB down –Other channels 40 dB down –Very little margin, especially with near/far problem in wireless Adjacent channel peformance is difficult to improve –Additional constraints on IMD undesirable Floor should be easy to improve –Phase noise level is tolerable

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 11 Suggested Masks for.11n Retain transition shape and level –No additional filter or linearity requirements Lower floor by 10 dB –Approximate limits on phase noise –L (f) = -123 dBc/Hz for 20 MHz channels –L (f) = -126 dBc/Hz for 40 MHz channels Should not place additional burden on implementations

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 12 Suggested Masks for.11n

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 13 Adjacent Channel Interference.11a to adjacent channel = dB.11a to alternate adjacent = -40 dB.11n (20 MHz #1) to adjacent = n (20 MHz #2) to adjacent = n (20 MHz either) to alternate adjacent = -50 dB.11n (40 MHz) to 20 MHz adjacent = –2.7 dB worse than.11a –for same TX power, actually 0.3 dB less interfence than 20 MHz channel since TX PSD in band drops by 3 dB.11n (40 MHz) to 40 MHz adjacent = -26.1

doc.: IEEE /0060r0 Submission January 2004 Christopher Hansen, BroadcomSlide 14 Conclusions PSD Mask floor can be improved for.11n –Reduce system interference –Improve system capacity Adjacent channel interference does not change 40 MHz channels are compatible with existing 20 MHz systems –0.3 dB adjacent channel interference improvement for same transmitter power