Synthetic instrument unit

• US 8,514,919 B2
• Filed: 08/25/2010
• Issued: 08/20/2013
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: BAE Systems Information and Electronic Systems Integration Incorporated (BAE Systems Plc)
• Original Assignee: BAE Systems National Security Solutions Incorporated (BAE Systems Plc)
• Inventors: Estrada, Anthony J., Ford, Dana C., Kim, Tae S., Lowdermilk, Robert W., Vuletic, Dragan
• Primary Examiner(s): Vlahos, Sophia
• Application Number:
  US13/126,127
• Publication Number:
  US 20120020397A1
• Time in Patent Office: 1,091 Days
• Field of Search: 375/224, 375/228, 375/340, 375/28, 455/226.1, 324/318, 324/510, 324/76.14, 324/76.19, 324/76.2, 324/76.21, 324/76.22, 324/76.23, 324/76.24, 702/70, 702/75, 702/76, 702/0.66
• US Class Current: 375/224
• CPC Class Codes: G01R 19/2516 Modular arrangements for computer based systems; using personal computers (PC's), e.g. "virtual instruments"
• CPC Class Codes: G01R 23/16 Spectrum analysis; Fourier analysis

Abstract

Systems and other embodiments associated with synthetic instrumentation are presented. A reconfigurable synthetic instrumentation unit comprises an input module, with dual input/output ports and conditioning logic to condition an input signal. An RF down converter selectively down converts the conditioned input signal. A sampled RF down converter selectively samples the conditioned input signal. A pair of narrowband A/D converters are configured to convert one of the conditioned signal, the down converted signal and the sampled signal to produce a narrowband digital signal. A pair of broadband A/D converters convert at least one of the conditioned signal, the down converted signal and the sampled signal to produce a broadband digital signal. Signal processing logic selectively performs digital signal processing on the broadband digital signal or the narrow band digital signal.

Claims

1. A system comprising:

a reconfigurable synthetic instrument unit comprising;

at least one input port;

at least one output port;

conditioning logic to condition an input signal from the at least one input port to produce a conditioned signal;

a radio frequency (RE) down converter to selectively down convert the conditioned signal to produce a down converted signal;

a sampled RF down converter to selectively sample the conditioned signal to produce a sampled signal;

a pair of narrowband analog-to-digital (A/D) converters, wherein each of the narrowband A/D converters is configured to convert at least one signal of the group of the conditioned signal, the down converted signal and the sampled signal to produce a narrowband digital signal;

a pair of broadband A/D converters, wherein each of the broadband A/D converters is configured to convert at least one signal of the group of the conditioned signal, the down converted signal and the sampled signal to produce a broadband digital signal; and

signal processing logic to perform digital signal processing on at least one of the broadband digital signal and the narrow band digital signal, wherein digital components within the signal processing logic are configured to be connected together in a plurality of different configurations, wherein the conditioning logic, the RD down converter, the sampled RF down converter, the pair of narrowband A/D converters, the pair of broadband A/D converters and the signal processing logic include the ability to be configured to perform spectrum analysis at one time and include the ability to be configured at different time as a microwave transition analyzer (MTA).

2. The synthetic instrument unit of claim 1 wherein the signal processing logic is configured to perform Fast Fourier Transform (FFT) based spectrum analysis and later is configured to perform as an analog swept frequency spectrum analyzer.

3. The synthetic instrument unit of claim 1 wherein the synthetic instrument unit is configured as the MTA by coupling the synthetic instrument unit with a dual-channel RF sampled down converter (SDC).

4. The synthetic instrument unit of claim 3 wherein the synthetic instrument unit is configured as the MTA and is configured to measure vector based signals.

5. The synthetic instrument unit of claim 4 wherein the synthetic instrument unit is configured to measure at least one of the group of:

vector amplitude, phase difference, vector power, forward transmission and forward reflection.

6. The synthetic instrument unit of claim 1 further comprising:

extensions for Instrumentation (PXI) Express™

chassis with at least one peripheral component interconnect PCI Express™

bus, wherein the synthetic instrument unit is coupled to the PCI Express™

bus.

7. The synthetic instrument unit of claim 6 further comprising:

a bridge coupling the PXI Express™

chassis to the synthetic instrument unit for remote communication and control of the synthetic instrument unit.

8. The synthetic instrument unit of claim 6 further comprising:

an embedded controller to support real-time control of the PXI chassis.

9. The synthetic instrument unit of claim 8 wherein the embedded controller further comprises:

a removable hard drive with memory accessible by the synthetic instrument unit.

10. The synthetic instrument unit of claim 1 wherein the RF down converter is a Phase Matrix™

(PMI) down converter configured to translate the conditioned signal to at least one of the group of;

a wideband intermediate frequency (IF) and a narrowband IF.

11. The synthetic instrument unit of claim 1 wherein the conditioning logic is configured to perform at least one of the group of:

signal path switching, pre-selection filtering and gain control.

12. The synthetic instrument unit of claim 1 further comprising:

a software defined graphical user interface (GUI) logic configured to generate controls on a display comprising at least one of the group of;

graphical buttons, graphical knobs and graphical displays, wherein the GUI logic is configured to change the controls on the display based on a configuration of the synthetic instrument unit.

13. The synthetic instrument unit of claim 1 wherein the input signal is within the frequency range between 0 Hz to 26.5 GHz.

14. The synthetic instrument unit of claim 1 wherein the synthetic instrument unit is configured to be controlled by a station controller over a local area network (LAN).

15. The synthetic instrument unit of claim 1 wherein the signal processing logic further comprises:

a memory, wherein the signal processing logic is configured to store down-converted digitized data in the memory so that the signal processing logic reads the data from the memory multiple times to apply different algorithms to the data at different times.

16. The synthetic instrument unit of claim 1 wherein the synthetic instrument unit includes the ability to be configured as an electronic consolidated air support system (eCASS) RF measurement system.

17. The synthetic instrument unit of claim 1 further comprising:

clock generation logic for generating clocks.

18. The synthetic instrument unit of claim 1 further comprising:

a radio frequency (RE) source port,

an auxiliary (Aux) input port; and

an RF input Channel 1 port.

19. The synthetic instrument unit of claim 1 wherein the signal processing logic includes a digital signal processor (DSP) configured to execute DSP software instructions.

20. A system comprising:

a reconfigurable synthetic instrument unit comprising;

a reconfigurable input module comprising;

at least one input port

at least one output port; and

conditioning logic configured to condition an input signal from the at least one input port to produce a conditioned signal;

a radio frequency (RF) down converter configured to selectively down convert the conditioned signal to produce a down converted signal;

a sampled RF down converter configured to selectively sample the conditioned signal to produce a sampled signal;

a pair of narrowband analog-to-digital (A/D) converters, wherein each of the narrowband A/D converters is configured to convert at least one signal of the group of the conditioned signal, the down converted signal and the sampled signal to produce a narrowband digital signal;

a pair of broadband A/D converters, wherein each of the broadband A/D converters is configured to convert at least signal one of the group of the conditioned signal, the down converted signal and the sampled signal to produce a broadband digital signal; and

signal processing logic configured to perform digital signal processing on at least one of the broadband digital signal and the narrow band digital signal, wherein the reconfigurable synthetic instrument unit has the ability to be configured in a first configuration at a first time to perform a first analysis of the input signal, and wherein the reconfigurable synthetic instrument unit has the ability to be configured in a second configuration at a second time to perform a second analysis of the input signal that is different than the first analysis.