53-0026-20_1300874798_SOW.docx

Computer Hardware Components for Experimental Radar System

09 September 2020

Introduction

The U.S. Naval Research Laboratory’s (NRL’s) Advanced Radar Systems requires computer hardware components to build real-time, back-end signal and data processing systems for an experimental radar. The systems will also be utilized for offline signal processing research and development and other tasks. Two (2) back-end systems will be built—one for use in the field and one for use at NRL. The hardware components include rack computer servers, network switches, peripherals and accessories to support each back-end system.

Background

In 2019, NRL completed the development of a back-end processing system for the Flexible Distributed Array Radar (FlexDAR), an enhanced radar sensor concept for surveillance, communications, and electronic warfare. The FlexDAR back-end system provides monostatic and distributed radar signal processing, inter-radar communications, scheduling, tracking and user interface functions.

The FlexDAR back-end system used 2U Dell PowerEdge R730s rack servers. Each server was configured with two (2) Intel Xeon E5-2698 v3 2.3GHz 16C/32T processors with 64GB of random access memory (RAM), a single 10GbE Network Adapter with four (4) ports, a single 1GbE Network Adapter with four (4) ports, two (2) 1TB 7200RPM Serial Attached Small Computer System Interface (SAS) hard disk drives and dual redundant 1100W power supplies. The 10GbE Network Adapter ports from all the servers were connected to a low latency 48-port 10GbE Dell S4048-ON. The 1GbE Network Adapter ports from all the servers were connected to a low latency Dell S3048-ON for file serving and precision time protocol (PTP). The servers ran on the CentOS 7 operating system and all the NRL-developed code was written in C++ and optimized and compiled for the Xeon processor. All of the hardware components were housed in an American Power Conversion (APC) 44U 19” rack with two (2) APC Rack Power Distribution Units (PDUs) (Model# AP8841) with (36) C13 outputs, an 8kVA APC uninterruptible power supply (UPS) (Model# DLRT8KRMXLT), and a 16-port Tripp-Lite keyboard, video, and mouse (KVM) (Model# B020-U16-19K) for easy switching between servers using on-console push buttons.

NRL now seeks to develop back-end processing systems similar to that of FlexDAR for an experimental radar, however, there are increased requirements due to the need for increased data streaming. System capability will need to be increased through increased number of processors per server and additional server memory. This system needs at least two times (2x) the processor capability and four times (4x) the memory capacity of the existing FlexDAR system due to the increased data stream and processing complexity.

Hardware Requirements

The Computer Hardware Components for Experimental Radar System shall consist of the following components:

1. Sixteen (16) Computer Servers [Eight (8) servers for each back-end system]

2. Two (2) 10GbE Switches [one (1) for each back-end system]

3. Two (2) 1GbE Switches [one (1) for each back-end system]

4. Two (2) Uninterruptible Power Supplies (UPS) and Four (4) Power Distribution Units (PDUs) [one (1) UPS for each back-end system, two (2) PDUs for each back end system]

5. Two (2) Keyboard/Video/Mouse (KVM) Units [one (1) for each back-end system]

· All equipment shall be rack mountable into existing Government-owned 19” server racks, namely the APC NetShelter SX Enclosure (Model# AR3100X717). All accessories, brackets, etc. for such mounting shall be provided.

· All equipment shall be covered by a three-year warranty which will include next business day, on-site support, technical support and assistance, and the option to retain hard drives when any hardware failure occurs.

Computer Servers The computer servers shall have at least four x86 architecture Central Processing Units (CPUs), with at least 64 cores per server, a clock speed of at least 2.3GHz. The server shall have support for ECC (Error Correcting Code) Random Access Memory (RAM) with at least 256Gb at 2933MT/s (Million Transfers per Second) RAM. The server shall at a minimum support the following connections:

· at least four 10GbE Ethernet ports

· at least four 1GbE Ethernet ports

· at least two external USB 2.0 ports

· at least two external USB 3.0 ports

· at least one external serial port

· at least one external VGA port

· keyboard and mouse connections The server shall have an internal Storage Controller, two 2.5in hard drives of at least 1TB capacity each with a spindle speed of 7000 RPM (Solid State Drive (SSD) with equivalent performance acceptable) or greater with SAS or SATA interface. The power supply shall be a dual, hot-plug redundant power supply of at least 1100W capable of operating on 100-140v and 200-240v 50/60 Hz power. The computer server shall be capable of running Centos/Red Hat Linux and C++ code optimized for the Intel Xeon processor. The form factor of the computer server shall be no more than 2U rack units (IEC 60297-3-108:2014) and shall have a non-operating storage temperature of -40C to 50C

10GbE Switch The 10GbE Switches shall be capable of at least 48 line-rate 10GBASE-T connections. In order to provide high data rates and low latency the 10GbE Switches shall be capable of at least 1000 Mega Packets per Second (Mpps) with support for Jumbo Frames with a desired latency of less than 650nsec. The 10GbE Switch shall utilize redundant power supplies capable of operating on both 100-120v and 200-240v 50/60 Hz power and the airflow of the FAN will flow from the power supply unit to the IO panel. The form factor of the 10GbE Switch shall be no more than 1U rack units (IEC 60297-3-108:2014) and shall have a non-operating storage temperature of -40C to 50C. Ethernet cables shall be provided for two connections to each server (10ft or greater, 32 cables total).

1GbE Switch The 1GbE Switches shall be capable of at least 48 line-rate 1000BASE-T connections. In order to provide high data rates and low latency the 1GbE Switches shall be capable of at least 120 Mega Packets per Second (Mpps) with support for Jumbo Frames with a desired latency of less than 4usec. The 1GbE Switch shall utilize redundant power supplies capable of operating on both 100-120v and 200-240v 50/60 Hz power and the airflow of the FAN will flow from the power supply unit to the IO panel. The form factor of the 1GbE Switch shall be no more than 1U rack units (IEC 60297-3-108:2014) and shall have a non-operating storage temperature of -40C to 50C. Ethernet cables shall be provided for all ports (10ft or greater, 96 cables total).

Uninterruptible Power Supply (UPS) and Power Distribution Unit (PDU) The UPS shall have an output power capacity of at least 8.0kWatts / 8.0kVA with a non-spillable lead acid battery with a run time of at least 4 minutes under full load. The topology of the UPS shall be double conversion online with Sine wave waveform and have an output frequency synced to mains 50/60 Hz. The UPS shall operate on 200-240v 50/60 Hz power and have internal bypass capability (automatic and manual). The output connectors of the UPS shall be compatible with the supplied PDUs. The UPS shall have a non-operating storage temperature of -10C to 40C.

The input connection of the PDUs shall be compatible with the UPS. The PDU shall have a nominal operating voltage of 208v, a load capacity of at least 4kVA with a minimum of (36) C13 and (6) C19 receptacles. Power cords shall be provided for all supplied components.

KVM Unit The system shall provide a KVM unit to allow all computer servers to utilize a single Keyboard/Video/Mouse. The KVM unit shall support at least 16 computer servers and have an 18 inch screen or greater. All associated cables shall be provided.

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