Direct Band-Pass Analog-to-Digital Conversion

The Navy is seeking the development of a direct band-pass analog-to-digital conversion capability for rotating air surveillance radar systems to improve performance capability and reduce costs. To demonstrate feasible cost and performance using this technology, the Navy requires a direct analog-to-digital conversion for the 850-950 MHz band having a noise figure of less than 3.5 dB, supporting 90 1 MHz bands of nonlinear frequency-modulated signals yielding a 1.5 microsecond pulse from a 32 microsecond transmitted pulse. Bedford Signals proposes to meet Navy needs by leveraging our extensive experience in band-pass sampling, digital signal processing, and high performance digital, analog, and RF hardware design. Specific Bedford Signals intellectual property applicable to the problem includes low latency high speed filters implementing digital down conversion and filtering, equalization and calibration techniques compensating for analog and RF imperfections to minimize compressed pulse width and temporal sidelobes, and dynamic delay emulation implementing high fidelity arbitrary sampling rate conversion.