SBIR-STTR Award

Space Micro will design and demonstrate a plug and fight digital component that filters out undesired intermodulation distortion over the whole HF band. The module we are proposing is highly reconfigurable and can be programmed for different waveforms, interferers, bandwidths and frequencies. It can be demonstrated and implemented using COTS components. We predict that the cost of the proposed wideband interference rejector (WIR) will be ridiculously small when compared to the cost of a wideband radio. Within the Phase I budget and time frame, SMI will demonstrate that, using the WIR, there is no need to modify any existing radio to get rid of undesired effects from the dirty RF and strong in-band interferers.The proposed WIR has multiple advantages:1. It is a fully functional plug and fight component.2. It is application independent.3. It is advantageous in terms of size, weight and power.4. The cost is ridiculously small when compared to the cost of the whole radio.5. It can be demonstrated and implemented using COTS components.6. It can be equipped with cognitive algorithms for adaptation to a dynamically changing environment.7. It can be used for removing other non-idealities/interferers affecting the signal of interest.wideband interference rejector,polyphase filter bank,COTS,HF,artificial intelligence,Software Defined Radio,Cognitive Radio,inter-modulation artifacts

During Phase I Space Micro successfully demonstrated, on a commercial SDR evaluation board, a Spectrum Aware Wideband Interference Rejector (SA-WIR) that nullifies undesired intermodulation distortion caused by strong in-band interferers over the whole HF (2-30MHz) band. Our SA-WIR module is highly reconfigurable and can be programmed in real-time via software for different waveforms, bandwidths and frequencies thus it can be embedded in any USSOCOM Special Mission Radio System (SMRS) radio product. Such a block is absolutely required and serves multiple purposes in a dense signal environment. In Phase II, Space Micro will implement, test and evaluate, supported by Entropix LLC, the SA-WIR concept on the existing AN/TRQ-43 V2 HF Base Station platform. Space Micro will bring the algorithm to a Technology Readiness Level 7 and demonstrate that the effect of high power interferers will be adaptively nullified by the WIR block before the signal of interest is demodulated. The spectrum aware WIR block enhances the radio performance bringing it to a whole other level and should be an essential part of it regardless of the Radio Frequency (RF) circuitry and/or the application.