Sidelobe Cancellation Using Difference Channels for Monopulse Processing

Technique For Monopulse Antenna With Improved Sidelobe Suppression In Both Sum And Difference Pattern

Last decade has seen the development of slotted-array antenna as they are the most preferred missile antenna, as they offer several significant advantages such as thin profile, light weight and ease of stabilisation. To achieve high speed tracking accuracies within fraction of a beam width, monopulse antenna is the chosen configuration. For look-down mode applications, aperture distributions ca...

Sidelobe Suppression using Cancellation Sub-Carriers for OFDM Superchannels

We mitigate the inter-channel-interference (ICI) in orthogonal frequency division multiplexing (OFDM) superchannel by adding cancellation sub-carriers (CCs). We experimentally show that CCOFDM outperforms conventional OFDM by 0.4-dB in a dual-polarization 400-Gbps 3360-km OFDM superchannel. Introduction Superchannels based on concatenating lowerrate orthogonal-frequency division multiplexing (O...

Front-End Processing for Monopulse Doppler Radar

FEPMR is standing for Front-End and Doppler Processing for Monopulse Doppler Radar. It is a PCB at the frontier between the RF and the Digital Circuits for the radar AXIR. There are four channels, corresponding to the four squinted beams of the antenna ( Right, Left, Up and Down ). Each beam channel is processed in phase (I) and quadrature ( Q) real baseband signals. The eight video analog sign...

Limits for generalized sidelobe cancellers with embedded acoustic echo cancellation

This paper analyzes positive synergies and theoretical limits of the combination of acoustic echo cancellation (AEC) and Generalized Sidelobe Cancellers (GSC) for the removal of echoes of loudspeaker signals and local interferers. While the proposed system only requires one AEC for an arbitrary number of microphones, the array gain is limited by the number of sensor channels when all interferer...

Space - Time Adaptive Monopulse Processing