Uplink Intercell Interference and Capacity in 3G LTE Systems
qBoost: Be Powerful in 3G and LTE - mipi.org Presentation Quantance... · High speed, high...
Transcript of qBoost: Be Powerful in 3G and LTE - mipi.org Presentation Quantance... · High speed, high...
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Copyright © 2012 MIPI Alliance. All rights reserved.
Vikas Vinayak, CEO Quantance, Inc
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qBoost: Be Powerful in 3G and LTE
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Legal Disclaimer
The material contained herein is not a license, either expressly or impliedly, to any IPR owned or controlled by any of the authors or developers of this
material or MIPI. The material contained herein is provided on an “AS IS” basis and to the maximum extent permitted by applicable law, this material is
provided AS IS AND WITH ALL FAULTS, and the authors and developers of this material and MIPI hereby disclaim all other warranties and conditions,
either express, implied or statutory, including, but not limited to, any (if any) implied warranties, duties or conditions of merchantability, of fitness for a
particular purpose, of accuracy or completeness of responses, of results, of workmanlike effort, of lack of viruses, and of lack of negligence. ALSO,
THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT, QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR
NON-INFRINGEMENT WITH REGARD TO THIS MATERIAL.
All materials contained herein are protected by copyright laws, and may not be reproduced, republished, distributed, transmitted, displayed, broadcast or
otherwise exploited in any manner without the express prior written permission of MIPI Alliance. MIPI, MIPI Alliance and the dotted rainbow arch and all
related trademarks, tradenames, and other intellectual property are the exclusive property of MIPI Alliance and cannot be used without its express prior
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IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THIS MATERIAL OR MIPI BE LIABLE TO ANY OTHER PARTY FOR THE COST OF
PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL,
DIRECT, INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY, OR OTHERWISE, ARISING IN ANY WAY OUT
OF THIS OR ANY OTHER AGREEMENT RELATING TO THIS MATERIAL, WHETHER OR NOT SUCH PARTY HAD ADVANCE NOTICE OF THE
POSSIBILITY OF SUCH DAMAGES.
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“…Houston, we have a problem” James Lovell , April 1970
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Envelope Tracking (ET) has become commercially viable
MIPI RFFE Interface enables mass market adoption of ET power supplies
High speed, high efficiency power supplies improve 3G /LTE
• Reduce costs
• Increase data speed
• Increase capacity
• Increase coverage
3G/LTE Data Networks need qBoost™ ET Power Management
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Network Performance depends on communication through RF Signals
RF Signals are in short supply for data
Heat places limitations on RF Signals
Data generates more heat than voice
Envelope Tracking Power Management can reduce heat
Data requires faster envelope power management
Quantance delivers the fastest power supply
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3G & LTE data speeds and data coverage stink
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Mobile networks use RF signals to communicate wirelessly
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Stronger RF signals carry more data Doubling RF Power is like using two phones
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Weaker RF signals reduce data speeds …
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... or even dropped calls
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Basestation RF Signals are 2-Orders of magnitude stronger
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Human interaction can drastically reduce RF Signals and send them the wrong way
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For data, your phone can transmit only half the power it can in voice
-50%
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Tablets, smart phones and data cards have limited power to send data
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Their power amplifiers (PAs) cannot produce the high power needed
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A tiny qBoost chip enables the PA with 100% more transmit power.
Enables
100%
Power
Increase
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Power Amplifiers can contribute up to 70% of battery drain
70%
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Heat is a waste byproduct of RF Power Amplifiers Heat is the design barrier
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Crossing the Heat Barrier: Efficiency or Convection Cooling
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Data carries more information than Voice Information is Change
Data changes faster and more than voice
64
kbps
10,000
kbps
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Faster changing and wider changing RF Signals are harder to amplify Voice is more efficient to amplify than data
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Average Power Tracking Instantaneous Power Tracking
with Quantance qBoost™
Slow Fast
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Types of Fast Power Management
Brute Force 100X increase
Clock Speed
Architectural Tailor to demand
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Combine two fast power supplies
Analog:
Speedy but
inefficient
Digital:
Efficient but
Slow
Fast and Efficient
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Combining two fast power supplies is challenging
Efficiency Noise
Bandwidth Stability
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3rd Generation Quantance Solution
Q845
Power Supply
PA
3G / 4G
Chipset
MIPI RFFE v1.10
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Device Performance
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E585With Quantance
Tra
nsm
it P
ow
er
(dB
m)
11 Mbps
11 Mbps 5.6 Mbps
384 Kbps
Uplink Performance
Without Quantance Uplink Performance
with Quantance
Active Modulation
R99
HSPA
HSPA+
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Network Performance
Up
lin
k T
hro
ug
hp
ut
(bp
s)
Uplink Throughput (Conducted Measurement with real NodeB)
Q1005: 24 dBm R99, 23dBm HSUPA
Baseline: 20 dBm R99, 20dBm HSUPA