NOISE SHAPING TECHNIQUES FOR ACTIVE PHASED ARRAY ANTENNA APPLICATIONS (ARTES AT 5C.462)

Description

The objective of the activity is to develop and test noise shaping techniques capable of improving the signal to noise ratio up to 20 dB for payloads with on-board processors and active phased array antennas. A test-bed representing critical elements of a payloadimplementing noise shaping will be developed and performances evaluated, including the development of noise shaping algorithms and their digital implementation. Targeted Improvements: Improvement of the signal to noise ratio in the order of 10 to 20dB of active phased array antenna. Description: Today, there is a trend to embark more and more digital signal processing techniques on telecommunication payloads (digital beamforming, filtering, signal routeing, noise reduction, etc.) to provide in-orbit flexibility, exploiting enabling technologies as they become available. System performance requirements today translate into very high component performance requirements and high-power consumption. This activity will explore a different approach. Noise-shaping techniques will be applied and a scalable active antenna concept will be developed and evaluated based on highly dense element lattices with spatial-oversampling. This allows separation of the noise of the Low Noise Amplifier (LNA) and non-linearities of the Analogue to Digital Converter(ADC) from the desired signal (beam) of interest. Several improvements will be implemented and evaluated:a) reduced power consumption and increased DC-to-RF efficiency by increasing the ADC effective number of bits and using lower resolution components and b) increased signal-to-noise ratio (SNR) and signal-to-distortion ratio by shaping the noise/distortion out of the frequency band of interest where the desired signal (beam) resides.A scalable breadboard of a Ka-band test-bed will be designed, manufactured and tested. It shall consist of RF chains, including the radiation element feed, LNAs and a digital processor. The processor shall be able to digitise and perform sigma-delta modulations. Lattices with different density levels will be evaluated to correlate SNR level with the radiation element density.

Tender Specifics