1. 6-10GHz Rate-Range and Link Budget
July 2007
Nov 2009
September 2012
6-10GHz Rate-Range and Link Budget
Date:
Authors:
Peter Ecclesine (Cisco Systems)

2. Nov 2009
September 2012
Abstract
This document examines rate and range estimates based on channel models for GHz as an extension frequency band for ac.

3. September 2012
This Presentation
Throughput estimates for possible 6-10GHz extensions to 11ac
Comparison to Rate-Range for existing 11ac PHY
Link Budget

4. Summary An up-sampled 11ac (11ac x 4) Path Loss Parameters [1]
September 2012
Summary
An up-sampled 11ac (11ac x 4)
0.9 us symbol duration for short GI (0.1 us CP)
1.0 us symbol duration for long GI (0.2 us CP)
512 FFT/IFFT
640 MHz channel bandwidth
Carrier spacing = 1250 KHz
Path Loss Parameters [1]
PL= PL0 +g*log10(dist.)

5. PHY Throughput
80 MHz
160 MHz
240 MHz
320 MHz
640 MHz
64-QAM
256-QAM
16-QAM
1x1
325
433
650
867
585
975
780
1300
1560
2600
2x2
1733
1170
1950
3120
5200
3x3
1755
2340
2925
3900
4680
7800
A 1x1 640 MHz system can provide high bandwidth for very low compressed video. This leads to low latency and high quality required for docking and display application.
A 2x2 640 MHz system can provide throughput in excess of 60GHz devices possibly at lower system cost and power consumption.
The wide bandwidth systems provide in excess of 5Gbps throughput for WLAN applications.

6. Estimated Rate vs Range (LoS)
Comparison of estimated throughput of 6-10GHz solution with 11ac 80 and 160 MHz solution. In both cases a 1x1 system is considered.
Path Loss models for 6-10GHz are based on ‘IEEE /278r0-SG3a’ The Ultra-wideband Indoor Path Loss Model. Path Loss models for 5GHz are based on IEEE /940r3 “TGn Channel Models’.
In typical applications 6-10 GHz provides 2x the throughput of 160 MHz transmissions along with reduced channel interference, lower power consumption and available world wide spectrum for multiple channel transmission. It also is a simple extension to IEEE ac reusing the antenna, baseband and MAC technology.

7. Link Budget for 1x1 SISO September 2012 Data rate 480 960 1560 4212
Mbps
Bandwidth
528
640
1920
MHz
TX power
-9.3
-7.1
-8.5
dBm
Path loss
57.2
52.1
47.0 dB
RX power
-66.5
-59.2
-60.6
-55.5
Noise figure
3.0
Noise power/bit
-87.2
-84.2
-82.1
-77.8
Total noise/bit
-81.2
-79.1
-74.8
Required Eb/No
4.7
Implementation loss
2.5
Link margin
6.9
5.1
2.4
2.7
Sensitivity
-73.4
-64.3
-63.0
-58.2 3 5 1
Band hopping
4.0
2.0
1.0
Meters
16-QAM, Rate 3/4
Note: Assumes 0dBi antenna, PL=47+17Log10(d) per Molisch, et al.

8. September 2012
Summary
6-10 GHz offers a minimum of 5 channels of 500MHz, each of which can have 1Gbps or more in a cubicle usage model
Spectrum regulations are in place worldwide
Can use SISO or “easy” MIMO (2x2, 16-QAM)
Most capacity improvement comes from B term in Shannon
Some new MCS will need to be added to 11ac
Power consumption of a PHY in these new bands is comparable to ac and is well suited to mobile platforms
RF design complexity and propagation behavior of signals in these bands is comparable to ac
6-10 GHz Could be used by PAN applications freeing up limited 5GHz for Infrastructure/Internet access
Addition of 6-10GHz bands to an ac PHY gives significant additional spatial capacity for peer-to-peer applications with minimal complexity increase