1. A VLSI receive beamformer for digital ultrasound imaging;Karaman,1992
2. Digital beamforming using non-uniform oversampling delta-sigma conversion;Karaman,1999
3. Heterodyning technique to improve performance of delta-sigma-based beamformers;Freeman;IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,1999
4. Low cost ultrasound imaging device that uses optimal-lag pulse shaping filters;Fomitchev,1999
5. M. Ali, D. Magee and U. DasGupta-“Signal Processing Overview of Ultrasound Systems for Medical Imaging’ Whitepaper-SPRAB12 2008.