HDRRTM Technology: Optimizing Direct RF Sampling Receiver Performance

Spurious emissions created by today’s direct RF sampling receivers can potentially cripple the system’s ability to detect and precisely analyze signals of interest. Precision Receiver’s High Dynamic Range Receiver (HDRR) technology is the latest and most effective means available for improving their performance by dramatically reducing internally-generated spurious signals and increasing Spurious-Free Dynamic Range (SFDR). It delivers an order-of-magnitude improvement in spurious signal reduction to levels previously unachievable using other methods, typically from 12 to 15 dB.

HDRR can be used in any direct-sampling system regardless of its analog-to-digital converter (ADC), at any frequency of interest, without the need for calibration, while reducing the complexity of anti-aliasing filters. It can be integrated within new receiver subsystems as well as those on existing platforms with few, if any, hardware changes.

Its applications are diverse, from electronic warfare to radar, signals and communications intelligence, spectrum monitoring, wireless communications, medical imaging, and radio astronomy systems.

Electronic Warfare

Every microsecond is critical for EW systems, and HDRR speeds the detection and identification of threats by removing spurious emissions created by the system itself. The result is more precise signal (amplitude and phase) identification and reduced time from signal capture to matching signals with those in threat libraries. By increasing SFDR, HDRR also allows sampling to be performed over broader instantaneous bandwidths, increasing detection range.

Radar

When employed in advanced AESA radars, HDRR increases detection range, improves observation of targets with very low radar cross-sections, removes false targets, and reduces the false alarm rate, while increasing rejection of signal aliasing, fold-over ghost images, and reflections.

COMINT, ELINT, and SIGINT

These systems can only detect signals of interest when the spectrum is free of spurious signals, and HDRR can strip these damaging signals away by increasing signal-to-noise ratio and increasing SFDR. The result is the ability to detect signals over a range of frequencies that would not be otherwise receivable.

Spectrum Monitoring

Monitoring signals in today’s densely-pack frequencies requires receivers that provide a clear view of the spectral environment, which can range from HF through millimeter wavelengths. HDRR helps ensure that these receivers achieve their highest levels of dynamic range and highest single-to-noise ratio by reducing spurious content generated by the receiver.

Wireless Communications

Spurious signals reduce dynamic range and significantly limit the coverage and capacity achievable by base station receivers. The introduction of 5G exponentially compounds this problem as it requires enormous numbers of small cells whose spurious signals, if left unchecked, dramatically reduce receiver performance. By reducing these signals and increasing SFDR, HDRR can reduce the number of cells required in a given area, lowering deployment costs while increasing quality of service.

Medical Imaging

These systems can only detect signals of interest when the spectrum is free of spurious signals, and HDRR can strip these damaging signals away by increasing signal-to-noise ratio and increasing SFDR. The result is the ability to detect signals that would not be otherwise possible over a range of frequencies.

Radio Astronomy

Few receivers are as sensitive to spurious signals as those used for radio astronomy. HDRR enables large, fast bursts of RF energy (Askaryan radiation) to be detected over broad bandwidths. It allows wide-sky, wide-bandwidth signal acquisition through methanol (CH3OH) spectral lines.