You are here

Signal Recognition and Management Band Pass Filter (BPF) Devices

Description:

OBJECTIVE: To develop Signal Recognition and Management Band Pass Filters (BPFs) that can parse out desired signal(s) from unintentional and/or intentional interference signals that are present in our RF jammers, sensors, and communications receiver channel(s) while maintaining capability to tune out all out-of-band interference signals from the receiver channel(s) of interest. These devices will be installed in-line between the antenna and the RF receiver of jammers, sensors, and communications systems. DESCRIPTION: US Army has a requirement to assure unimpeded voice and data flow in RF jammers, sensors, and communications systems within the integrated C4ISR network system. Specifically, the Signal Recognition and Management Band Pass Filter (BPF) device will be designed and fabricated to perform the following functions. First, the Signal Recognition device will parse out signal(s) of interest from unintentional interference signals such as EMI, RF harmonics of friendly communications systems, and friendly jamming signals as well as intentional interference such as enemy jamming signals that are present in receiver channels of our jammers, sensors, and communications systems. In-pass interference separation objective will be 50 dB which is the degree of separation between designed signal(s) and interference. Second, the BPF devices will retain the traditional function of rejecting out-of-band interference signals to selected receiver channels. The minimum out of band rejection ratio will be 70 dB. The minimum passband bandwidth will cover the receiver channel for all jammers, sensors, and communications systems. The passband bandwidth, passband ripple, and transition frequency ranges will be set for optimum performance. These BPF channels will be programmable. Finally, the BPF devices will be capable of rapidly tuning its band pass filters to cover frequency hopping radios and rapid scan ELINT operations from interference signals. Tuning speed will be at 250 ns or less including settling time. RF frequency range for these devices will cover the RF frequency spectrum from HF to microwave. Minimal SWAP will be seriously considered with the BPF device size, weight, and power consumption being less than .10 ft3, 1 lb, and tens of Watts respectively. The production device will be installed in-line between the antenna and the RF receiver of jammers, sensors, and communications systems. PHASE I: Conduct a feasibility study that identifies and addresses the problems that must be overcome in order to successfully parse out the desired information signal(s) from interference signals that are present in RF receiver channels. Develop system design and architecture as well as performance specifications for the Signal Recognition and Management BPF device. Deliver final report that covers the outcome of this study, system performance specifications, and system design and architecture development. PHASE II: Fabricate a laboratory prototype to test and demonstrate/validate the feasibility of parsing out desired signal(s) from interference. Develop production prototype for Signal Recognition and Management BPF device that will be operational under rugged field environments using MIL-STD-810G as a guide. This production unit will undergo evaluation test under laboratory and rugged field environment for operability and reliability at Government facilities. PHASE III: Develop Signal Recognition and Management BPF devices that will transition to all RF receivers within PEO IEW & S and PEO C3T jammers, sensors, and communications systems. These devices can be applied domestically by police, FBI, and Homeland Security to parse out and/or secure information signals of interest (e.g., terrorist transmission, police radio transmission, etc.) in a noisy environment. These devices can be also used by search and rescue teams to detect distress calls that would otherwise be masked in a noisy environment. REFERENCES: http://www.cs.cmu.edu/~aarti/pubs/ANC.pdf Adaptive Noise Cancellation http://arxiv.org/pdf/0802.1343 Impedance-Matched Low-Pass Stripline Filters http://eceweb1.rutgers.edu/~orfanidi/osp2e/osp2e.pdf Optimum Signal Processing, An Introduction http://www.dtc.army.mil/publications/milstd.aspx then click on"MIL-STD-810G", MIL-STD-810G (Environmental Engineering Considerations and Laboratory Tests) http://peoiews.apg.army.mil/ then click on"PROGRAMS"http://peoc3t.army.mil/c3t/
US Flag An Official Website of the United States Government