# Presentation: 812380

## Presentation to UAT MOPS WG-5UAT-WP-7-10

- Larry Bachman
- 240-228-6339
- larry.bachman@jhuapl.edu

## Core Europe Runs I

- Link 16 Baseline, option B
- No antenna effects
- Two adjacent channel DMEs
- 3600 pulse pairs/second for each
- UAT self-interference
- Co-site 1030, 1090, DME interference
- Several altitude options
- Highest number of other aircraft in view (usually high altitude (FL300-400)
- FL150

## Core Europe Runs II

- Several transmit power options
- Nominal
- A3: 50-54 dB
- A2: 41-45 dB
- A0/A1: 37-41 dB
- Option A
- A3: 48-52 dB
- A2: 42-46 dB
- A0/A1: 38.5-42.5 dB
- Option B
- A3: 50-54 dB
- A1/A2: 42-46 dB
- A0: 38.5-42.5 dB

## Core Europe Runs III

- Several receiver configuration options
- A2/A3: diversity receivers
- A1: switched receiver
- A0: bottom antenna only
- A0 restrictions
- Up to FL150
- Transmits on bottom antenna only
- Receive filters
- A2/A3 have both 0.8 MHz and 1.2 MHz
- A0/A1 have 1.2 MHz only

## Differences from Previous Results

- Link 16: different baseline scenario
- DME
- Two adjacent channel DMEs instead of one
- Excursion: 3 adjacent channel DMEs
- Reduced signal level at top antenna (-10 dB)
- Comment:  This scenario corresponds to an AWACS transmitting at full capacity over Brussels, flying 1000 ft from the aircraft, which is also near 2-3 high-power DMEs each transmitting at the same frequency within miles of each other.

## Order of Results

- Comparison of power options
- Comparison of receive filter options
- Reception by various aircraft types

## State Vector Update Times for A3 Receivers at FL 400 with 1.2 MHz Filter

## TCP Update Times for A3 Receivers at FL 400 with 1.2 MHz Filter

## State Vector Update Times for A3 Receivers at FL 400 with 0.8 MHz Filter

## TCP Update Times for A3 Receivers at FL 400 with 0.8 MHz Filter

## State Vector Update Times for A3 Receivers at FL 150 with 1.2 MHz Filter

## TCP Update Times for A3 Receivers at FL 150 with 1.2 MHz Filter

## State Vector Update Times for A3 Receivers at FL 150 with 0.8 MHz Filter

## TCP Update Times for A3 Receivers at FL 150 with 0.8 MHz Filter

## State Vector Update Times for A1 Receivers at FL 400 with 1.2 MHz Filter

## State Vector Update Times for A1 Receivers at FL 150 with 1.2 MHz Filter

## State Vector Update Times for A0 Receivers at FL 150 with 1.2 MHz Filter

## Maximum Range of MASPS Compliance for SV/TCP Broadcasts from A3 Tx

| Receiver | Nominal | Power A | Power B |
| --- | --- | --- | --- |
| A3 FL 400, 1.2 MHz  | 105 | 75 | 95 |
| A3 FL 400, 0.8 MHz | 140 | 110 | 125 |
| A3 FL 150, 1.2 MHz | 85 | 70 | 80 |
| A3 FL 150, 0.8 MHz | 130 | 100 | 125 |
| A1 FL 400, 1.2 MHz | 85 | 65 | 85 |
| A1 FL 150, 1.2 MHz | 70 | 60 | 65 |
| A0 FL 150, 1.2 MHz | 55 | 45 | 50 |

## Maximum Range of MASPS Compliance for SV/TCP Broadcasts from A2 Tx

| Receiver | Nominal | Power A | Power B |
| --- | --- | --- | --- |
| A3 FL 400, 1.2 MHz  | > 40 | > 40 | > 40 |
| A3 FL 400, 0.8 MHz | > 40 | > 40 | > 40 |
| A3 FL 150, 1.2 MHz | 30 | 32 | 30 |
| A3 FL 150, 0.8 MHz | > 40 | > 40 | > 40 |
| A1 FL 400, 1.2 MHz | 25 | 35 | 30 |
| A1 FL 150, 1.2 MHz | 0 | 25 | 0 |
| A0 FL 150, 1.2 MHz | 0 | 0 | 0 |

## Maximum Range of MASPS Compliance for SV Broadcasts from A1 Tx

| Receiver | Nominal | Power A | Power B |
| --- | --- | --- | --- |
| A3 FL 400, 1.2 MHz  | > 20 | > 20 | > 20 |
| A3 FL 400, 0.8 MHz | > 20 | > 20 | > 20 |
| A3 FL 150, 1.2 MHz | > 20 | > 20 | > 20 |
| A3 FL 150, 0.8 MHz | > 20 | > 20 | > 20 |
| A1 FL 400, 1.2 MHz | 0 | 0 | > 20 |
| A1 FL 150, 1.2 MHz | 10 | > 20 | > 20 |
| A0 FL 150, 1.2 MHz | 0 | 10 | > 20 |

## Summary of MASPS Compliance for Power Options for Fully Loaded Simulations

- For A3 transmissions, the Nominal and B power options perform equally well in fulfilling MASPS requirements, and power option A performs somewhat worse.
- For A2 transmissions, power option A outperforms the other two power options.
- For A1 transmissions, power option B outperforms the other two power options.

## Comparison of A3 Receiver State Vector Update Times at FL 400 for Two Receive Filters

- Nominal Power Option used for all Tx

## Comparison of A3 Receiver State Vector Update Times at FL 150 for Two Receive Filters

- Nominal Power Option used for all Tx

## Summary of MASPS Compliance for Filter Comparison in Fully Loaded Simulation

- For both altitudes considered, A3 compliance with the MASPS requirements was better for the 0.8 MHz filter case.
- At FL 150, A2 compliance with the MASPS requirements was better for the 0.8 MHz filter.
- A1 was compliant with the MASPS requirements for both filters.

## Comparison of State Vector Update Rates for Different Receivers from A3 Transmissions

## Comparison of State Vector Update Rates for Different Receivers from A2 Transmissions

## Comparison of State Vector Update Rates for Different Receivers from A1 Transmissions

## Summary and Conclusions

- Power option B was chosen based on subjective judgment of overall compliance with MASPS requirements
- The 0.8 MHz filter clearly outperformed the 1.2 MHz filter in A3 receivers for the given interference scenarios
- Although the interference environment applied in these simulations was severe, the UAT data link appears capable of fulfilling the MASPS requirements in most situations