As shown in Figure 9, this image processing application is Raspberry Pibased and incorporates off-the-shelf components to replace what would oth- erwise be a high-cost system. The project involved a digital single-lens reflex camera and image processing performed by the microcomputer to gener- A23 A12 Hidden State Multinominal HMM Z1 Φ11 Φ12 Symbol Sequence Z2 A21 Z3 A32 Φ22 Φ Φ32 23 Φ21 S1 S2 Feature Extraction Symbolize Φ33 S3 Symbolize Symbolize State 8 Range-Doppler Plane State 1 State 4 Object Track Object Track Figure 8. Feature extraction and classification workflow. Figure 9. The design of the DIY Sky Imager. ate a segmented binary image. A simple algorithm is employed to calculate the instantaneous cloud coverage. This is useful for regular monitoring of cloud formation over a region. Chien-Sheng Yang and Dr. Lav R. Varshney with the University of Illinois at Urbana-Champaign present a more research-oriented project in "Self-Sustainable OFDM Transmissions with Smooth Energy Delivery" (https://sigport.org/documents/selfsustainable-ofdm-transmissions-smoothenergy-delivery). This project studies the question: "Is it possible to have small peak-to-average power ratio (PAPR) in the cyclic prefix of an OFDM signal, while maintaining self- sustainability?" A new system architecture, shown in Figure 10, is proposed that employs a frame-theoretic method that demonstrates significant improvement in PAPR of the cyclic prefix in self-sustainable OFDM. Audio processing is at the core of the "Automatic Lyrics Display System for Live Music Performances" project by Karan Vombatkere, Bochen Li, and Dr. Zhiyao Duan with the University of Rochester, New York (https://sigport .org/documents/automatic-lyrics-display-system-live-music-performances). The primary objective of the project is to design and implement a computational system that can follow live music performances (e.g., choruses) in real time and display pre-encoded lyrics for E1 t Data Expansion E2 Lowest PAPR Selection IDFT Cyclic Prefix Channel EP Cyclic Prefix Energy Harvester Decoding DFT Erasure Reconstruction IDFT Equalization Figure 10. A self-sustainable OFDM system with EPS-CP for PAPRCP reduction. 86 IEEE Signal Processing Magazine | January 2017 | DFT Cyclic Prefix Retrievalhttps://www.sigport.org/documents/self https://sigport