ip20c mimo

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October 2014, ver6

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Agenda

• Line-of-Sight (LOS) MIMO

• LoS MIMO Benefits

• LOS MIMO Theory of Operation

• Installation of 2x2 MIMO link

• Configuration MIMO 2x2

• Installation of 4x4 MIMO link

• Configuration MIMO 4x4

• MIMO Recovery Mechanism

• Utilizing MIMO Configuration for Space Diversity

• 1+0 SD

• 2+0 SD

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Proprietary and Confidential

Enhanced by Multi-Core innovation

FibeAir IP-20C

Sets a New Standard in Microwave Transmission

LoS 4x4 MIMO

Quadruples radio throughput using the same

spectrum, at half the form-factor

LoS: Line-of-Sight

MIMO: Multiple-Input & Multiple-Output

3

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• Using antenna separation to achieve uncorrelated receiver streams

• At each site the original data is split into 4 bit streams

• Two antennas, two polarization on each

• The receiver is able to distinguish between the streams due to a phase

difference caused by the antenna separation.

• Transmitting and receiving utilizing

the same frequency channel

Line-of-Sight (LOS) MIMO

Site 1 Site 2

V

H V

MIMO

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NLoS and LOS MIMO

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• NLoS MIMO originated as a non-line-of-sight (NLoS) technology, exploiting signal

multi-path caused by reflections from various physical obstacles by using multiple transmitters

and receivers to increase spectral efficiency by spatially multiplexing multiple bitstreams

over the same frequency channel.

• In LoS microwave, the non-LoS multipath signal is weak and unusable for the purpose of

MIMO. Instead, LoS MIMO achieves spatial multiplexing by creating an artificial phase

de-correlation by deliberate antenna distance at each site in deterministic constant distance.

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LoS MIMO Benefits

• Immunity to dispersive fading

• Similar to that achieved in space diversity

• Quadruple the capacity

• Compared to 1+0 SISO link

• System gain improvement

• Smaller Antennas

• Longer Links

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QUADRUPLING the Capacity

Enabled by Multi Core Radio

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Switching ON MIMO

QUAD. The Capacity Mbps Same Link Distance Km Same Antenna Size ft

1+0 vs. 4X4 MIMO

1Gbps Radio Throughput on a 30/28MHz Channel

Ch1 V Ch2 H Ch1 V Ch1 H

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Ceragon’s Implementation of LoS MIMO

• Using a single channel to quadruple the capacity

• 2 x Multi-Core units at each site

• Simple direct mount installation

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System Gain Benefit using MIMO

9

28MHz

V

30/28MHz 30/28MHz

f1

452Mbps

_{4 x 133 = 532Mbps}

f1

3dB

Operating in MIMO

+

11dB

1024 to 64QAM

+

2dB

Higher TX power

due to QAM change

16dB!

Addition to System Gain

2+0 XPIC

4X4 MIMO

64 QAM

1024QAM

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Spectrum Decongestion using MIMO

1+0 SISO 2X2 MIMO

6 GHz

Congested

spectrum

MIMO

11 GHz

Uncongested

spectrum

Link Parameters

20 miles

99.999% availability 30MHz channel Rain zone: K 256 QAM  32 QAM

MIMO

Additional Benefits

• 2 X 6 ft. Antennas  4 X 3 ft. antennas –

• Lower tower weight load

(up to 60% less weight)

• Lower tower wind load

(up to 40% less wind load)

• Simpler and less expensive installation

(need crane for 6ft. antenna)

• 200 Mbps  2 X 115 Mbps

(15% more capacity)

• Same spectral resources

3 ft. 3 ft. 6 ft. 200 Mbps 115 Mbps 15% more 115 Mbps

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Site Optimization Using MIMO

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Future Proof – Doubling the Capacity with no Network Re-planning!

Switching ON MIMO

Double Capacity Mbps Double Link Distance Km Same Antenna Size ft

2+0 XPIC vs. 4X4 MIMO

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QUADRUPLING the Capacity

XPN– Stretching the Network Capabilities

Switching ON MIMO

Quad Spectral Efficiency Bit/Hz QAUD. The Capacity Mbps Same Link Distance Km Same Antenna Size ft

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LoS MIMO – Theory of Operation

h

₁

h

₂

𝑑

₁₁

𝑑

₁₂

𝑑

₂₁

𝑑

₂₂ Signal A Signal B A + B A - B DSP DSP

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LoS MIMO – Theory of Operation

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• The same signal will arrive at a different

phase in different antennas

• We control the phase by varying path

lengths (

𝒅

_𝒊𝒋

)

• Path lengths are configurable by

controlling antenna separation

(𝒉

_𝟏

, 𝒉

_𝟐

)

• The following equation formulates the

antenna separation distance required for

optimal LoS MIMO operation

ℎ

₁

∙ ℎ

₂

=

𝐷 ∙ 𝑐

2𝑓

h1, h2: Antennas’ Separation [m] D: Link Distance [m] c: Speed of Light 3 × 108 m sec f: Link Frequency [Hz]

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LoS MIMO – Theory of Operation

• Sub-Optimal (

𝒉 ≠ 𝒉

_{𝒐𝒑𝒕𝒊𝒎𝒂𝒍}

) antenna separation on one

side can be offset by proper antenna separation on

opposite side

• A continuum of optimal installation scenarios

ℎ

₁

∙ ℎ

₂

=

𝐷 ∙ 𝑐

2𝑓

Special case:

𝒉

_𝟏

= 𝒉

_𝟐

≝ 𝒉

𝒉

=

𝑫 ∙ 𝒄

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LoS MIMO installation

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Horizontal

Separation

Vertical Separation

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MIMO 4x4 Technology

Ceragon’s MIMO technology is simple to deploy

Optimal Antenna Separation Capacity vs. Antenna Separation

Achieving 70% of max capacity at half the optimal

antenna separation (On both ends!)

Link distance [km] Optima l A nt e nna S e par a tion [m]

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Link Commissioning without MIMO

• Make link commissioning and antenna alignment for the planned frequency first for the Master antenna, than for the Slave antenna

• Antenna separation based on calculation for MIMO link

Port #1 f1

h

optimal

h

optimal

Port #2 f1

Master

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Enable MIMO

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• For 2x2 MIMO keep Role in Non-relevant mode

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Make sure…- MIMO 2x2

Common frequency channel for both carriers XPIC group disabled

Multi Radio group disabled ATPC disabled

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MRMC script for MIMO

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• Make sure MIMO group already configured and enabled

• The same kind of MRMC script will be configured automatically on the second carrier

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Final confirmation

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Link Commissioning without MIMO

•

Make link commissioning and antenna alignment for the planned frequency first when Master is transmitting only, than when Slave is transmitting only for Single polarization

•

Antenna separation based on calculation for MIMO link

f1

h

optimal

h

optimal

Master

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Cabling for 4x4 MIMO

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Source Sharing

Prot MNG

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IP20C 4x4 MIMO

OMT

Local MNG

Source sharing coax cable with TNC connector Data sharing Eth#3 SFP opt

Traffic VID 10, 20 Traffic VID 10, 20 Eth#1

Traffic VID 20 Eth#2

MNG Protection via Protection splitter Y cable

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Cables for MIMO Connections

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Marketing P/N

Description

DATA_SHRNG_KIT_5m CABLE,SFP,4x4MIMO_DATA_SHARING_KIT_5M DATA_SHRNG_KIT_10m CABLE,SFP,4x4MIMO_DATA_SHARING_KIT_10M DATA_SHRNG_KIT_20m CABLE,SFP,4x4MIMO_DATA_SHARING_KIT_20M DATA_SHRNG_KIT_30m CABLE,SFP,4x4MIMO_DATA_SHARING_KIT_30M SOURCE_SHARING_5M Source_Sharing_5m SOURCE_SHARING_10M Source_Sharing_10m SOURCE_SHARING_20M Source_Sharing_20m SOURCE_SHARING_30M Source_Sharing_30m

IP-20_MIMO_Prot_ mng_cbl_5m IP-20C MIMO or Prot management cable 5m IP-20_MIMO_Prot_ mng_cbl_10m IP-20C MIMO or Prot management cable 10m IP-20_MIMO_Prot_ mng_cbl_20m IP-20C MIMO or Prot management cable 20m IP-20_MIMO_Prot_ mng_cbl_30m IP-20C MIMO or Prot management cable 30m IP-20_MIMO_Prot_ mng_spltr IP-20C MIMO or Prot management odu spltr

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4x4 MIMO group

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Enable MIMO

• For 4x4 MIMO configurations, select Master or Slave in the Role field

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Make sure…- MIMO 4x4

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Common frequency channel for both carriers XPIC group disabled

Multi Radio group enabled ATPC disabled

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Final confirmation

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Switching Trigger

Switching into Half capacity mode is done when there is problem with:

• Radio Hardware

• Source Sharing connection • Data Sharing connection • MNG Protection connection

OMT

Traffic VID 10, 20

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Half Capacity MIMO

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MIMO Status via CLI

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Utilizing MIMO Configuration for Space

Diversity

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MIMO configuration for SD

FibeAir IP-20C’s MIMO capabilities can also be utilized, with minor

adjustments, to provide

Baseband Combining (BBC) Space Diversity (SD).

An SD configuration is based on either a

2x2 MIMO installation (for 1+0 SD)

or a

4x4 MIMO installation (for 2+0 SD, using two IP-20C units)

,

with

antenna separation based on SD requirements.

• the transmitter connected to the diversity antenna is muted to achieve a

configuration that consists of a single transmitter and two receivers

• When IP-20C is configured for SD operation, the signal is combined at the

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1+0 Space Diversity

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•

Single IP-20C on each side of the link, with both radio carriers activated.

•

The second carrier is muted.

•

On the receiving side, the signals are combined to produce a single, optimized signal

•

Configuration based on 2x2 MIMO configuration but with antenna separation based on SD requirements Carrier 1 Carrier 2 (Muted) Carrier 1 Carrier 2

1+0 SD

X

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2+0 Space Diversity

•

Two IP-20C units on each side of the link, with both radio carriers activated in each unit

•

Both carriers of the slave unit are muted

•

On the RX side, each unit receives a dual polarization signal from the remote master unit, which includes the data streams from both carriers

•

The slave unit shares the data stream it receives with the master unit, and the master unit combines each data stream to produce a single, optimized signal for each carrier

•

Configuration based on 4x4 MIMO configuration but with antenna separation based on SD requirements H V V H