Vishnu Unnikrishnan

36 papers C 3Journal 12Unranked 20

Year	Rank	Type	Title / Venue / Authors
2024	J	`jnl`	Digital Polar Transmitters for Massive MIMO: Sum-Rate and Power Efficiency Analysis. IEEE Trans. Wirel. Commun. Guixian Xu, Vesa Lampu, Marko Kosunen, Vishnu Unnikrishnan, Jussi Ryynänen, Mikko Valkama, Lauri Anttila
2024	J	`jnl`	Reconfigurable Signal Processing and DSP Hardware Generator for 5G and Beyond Transmitters. IEEE Trans. Very Large Scale Integr. Syst. Agnimesh Ghosh, Andrei Spelman, Tze Hin Cheung, Dhanashree Boopathy, Kari Stadius, Manil Dev Gomony, Mikko Valkama, Jussi Ryynänen, Marko Kosunen, Vishnu Unnikrishnan
2024	—	`conf`	Variable Time-Step 2.5-15 GHz Phase Modulator with Pre-Distortion for Outphasing Transmitters. NewCAS Tze Hin Cheung, Agnimesh Ghosh, Andrei Spelman, Dhanashree Boopathy, Vishnu Unnikrishnan, Lauri Anttila, Mikko Valkama, Marko Kosunen, Kari Stadius, Jussi Ryynänen
2023	—	`conf`	High-Precision Time-to-Digital Conversion for Calibration of Outphasing Radio Transmitters. NEWCAS Dhanashree Boopathy, Tze Hin Cheung, Andrei Spelman, Agnimesh Ghosh, Vesa Lampu, Lauri Anttila, Kari Stadius, Marko Kosunen, Jussi Ryynänen, Vishnu Unnikrishnan
2023	J	`jnl`	Multilevel Outphasing With Over-the-Air Combining in Large Antenna Arrays. IEEE Trans. Commun. Vesa Lampu, Guixian Xu, Alberto Brihuega, Marko Kosunen, Vishnu Unnikrishnan, Jussi Ryynänen, Christian Fager, Mikko Valkama, Lauri Anttila
2022	—	`conf`	A 0.8-6 GHz True-Time-Delay Beam-Nulling Receiver Front-End. ICECS 2022 Kalle Spoof, Miikka Tenhunen, Vishnu Unnikrishnan, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2022	C	`conf`	A 0.9-Nyquist-Band Digital Timing Mismatch Correction for Time-Interleaved ADCs Achieving Delay Tuning Range of 0.12-Sample-Period. ISCAS Ilia Kempi, Okko Järvinen, Marko Kosunen, Vishnu Unnikrishnan, Kari Stadius, Jussi Ryynänen
2022	—	`conf`	A 2 GS/s 9-bit Time-Interleaved SAR ADC with Overlapping Conversion Steps. NEWCAS Miikka Tenhunen, Kalle Spoof, Vishnu Unnikrishnan, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2022	C	`conf`	Design of Cyclic-Coupled Ring Oscillators with Guaranteed Maximal Phase Resolution. ISCAS Okko Järvinen, Vishnu Unnikrishnan, Ilia Kempi, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2022	J	`jnl`	Energy-Efficient Cyclic-Coupled Ring Oscillator With Delay-Based Injection Locking. IEEE Trans. Circuits Syst. II Express Briefs Okko Järvinen, Vishnu Unnikrishnan, Ilia Kempi, Santeri Porrasmaa, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2022	—	`conf`	Reconfigurable Signal Processing and DSP Hardware Generator for 5G Transmitters. NorCAS Agnimesh Ghosh, Andrei Spelman, Tze Hin Cheung, Dhanashree Boopathy, Vishnu Unnikrishnan, Vesa Lampu, Guixian Xu, Lauri Anttila, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2022	J	`jnl`	True-Time-Delay Receiver IC With Reconfigurable Analog and Digital Beamforming. IEEE Access Kalle Spoof, Miikka Tenhunen, Vishnu Unnikrishnan, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2021	J	`jnl`	A 100-750 MS/s 11-Bit Time-to-Digital Converter With Cyclic-Coupled Ring Oscillator. IEEE Access Okko Järvinen, Vishnu Unnikrishnan, Waqas Siddiqui, Teuvo Korhonen, Kimmo Koli, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2021	J	`jnl`	Data Conversion With Subgate-Delay Time Resolution Using Cyclic-Coupled Ring Oscillators. IEEE Trans. Very Large Scale Integr. Syst. Vishnu Unnikrishnan, Okko Järvinen, Waqas Siddiqui, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2021	—	`conf`	Energy-Efficient Array Transmitters Through Outphasing and Over-the-Air Combining. ACSCC Vesa Lampu, Guixian Xu, Lauri Anttila, Alberto Brihuega, Marko Kosunen, Vishnu Unnikrishnan, Jussi Ryynänen, Mikko Valkama
2020	C	`conf`	Injection Locking of Ring Oscillators with Digitally Controlled Delay Modulation. ISCAS Vishnu Unnikrishnan, Okko Järvinen, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2020	J	`jnl`	Resilient flow control for wireless data streaming in inductively coupled medical implants. Microprocess. Microsystems Ilia Kempi, Nouman Ahmed, Andreas Hammer, Olaitan Olabode, Vishnu Unnikrishnan, Marko Kosunen, Jussi Ryynänen
2020	J	`jnl`	Time-Based Sensor Interface for Dopamine Detection. IEEE Trans. Circuits Syst. Olaitan Olabode, Marko Kosunen, Vishnu Unnikrishnan, Tommi Palomäki, Tomi Laurila, Kari Halonen, Jussi Ryynänen
2020	J	`jnl`	True-Time-Delay Beamforming Receiver With RF Re-Sampling. IEEE Trans. Circuits Syst. Kalle Spoof, Vishnu Unnikrishnan, Mahwish Zahra, Kari Stadius, Marko Kosunen, Jussi Ryynänen
2019	—	`conf`	A Delay-Based LO Phase-Shifting Generator for a 2-5GHz Beamsteering Receiver in 28nm CMOS. ESSCIRC Yury Antonov, Mikko Valkama, Marko Kosunen, Jussi Ryynänen, Mahwish Zahra, Kari Stadius, Zahra Khonsari, Ilia Kempi, Toni Miilunpalo, Juha Inkinen, Vishnu Unnikrishnan, Lauri Anttila
2019	—	`conf`	A Sensor Interface for Neurochemical Signal Acquisition. MWSCAS Olaitan Olabode, Marko Kosunen, Vishnu Unnikrishnan, Tommi Palomäki, Tomi Laurila, Kari Halonen, Jussi Ryynänen
2018	—	`conf`	A 3-43ps time-delay cell for LO phase-shifting in 1.5-6.5GHz beamsteering receiver. NEWCAS Yury Antonov, Mahwish Zahra, Kari Stadius, Zahra Khonsari, Nouman Ahmed, Ilia Kempi, Juha Inkinen, Vishnu Unnikrishnan, Jussi Ryynänen
2018	—	`conf`	A Configurable Hysteresis Comparator for Asynchronous Sigma-Delta Modulators. NORCAS Olaitan Olabode, Vishnu Unnikrishnan, Ilia Kempi, Andreas Hammer, Marko Kosunen, Jussi Ryynänen
2018	—	`conf`	A Low-Power Hardware Stack for Continuous Data Streaming from Telemetry Implants. NORCAS Ilia Kempi, Nouman Ahmed, Andreas Hammer, Olaitan Olabode, Vishnu Unnikrishnan, Marko Kosunen, Jussi Ryynänen
2018	—	`conf`	A VCO-based ADC with Relaxation Oscillator for Biomedical Applications. ICECS Olaitan Olabode, Antti Ontronen, Vishnu Unnikrishnan, Marko Kosunen, Jussi Ryynänen
2018	—	`conf`	Ring Counters as Phase Accumulator in VCO-Based ADCs. ICECS Mark Vesterbacka, Vishnu Unnikrishnan
2017	J	`jnl`	Mitigation of Sampling Errors in VCO-Based ADCs. IEEE Trans. Circuits Syst. I Regul. Pap. Vishnu Unnikrishnan, Mark Vesterbacka
2016	—	`—`	Design of VCO-based ADCs. Vishnu Unnikrishnan
2016	—	`conf`	Design of a VCO-based ADC in 28 nm CMOS. NORCAS Vishnu Unnikrishnan, Mark Vesterbacka
2016	—	`conf`	Linearization of VCO-based ADCs using asynchronous sigma-delta modulation. MWSCAS Vishnu Unnikrishnan, Mark Vesterbacka
2016	—	`conf`	Mixed-Signal Design Using Digital CAD. ISVLSI Vishnu Unnikrishnan, Mark Vesterbacka
2016	—	`conf`	VCO-based ADCs for IoT applications. ISIC Vishnu Unnikrishnan, Mark Vesterbacka, Atila Alvandpour
2015	—	`conf`	A NAND gate based standard cell VCO for use in synthesizable ADCs. NORCAS Vishnu Unnikrishnan, Mark Vesterbacka
2015	—	`conf`	A fully synthesized all-digital VCO-based analog-to-digital converter. NORCAS Vishnu Unnikrishnan, Srinivasa Rao Pathapati, Mark Vesterbacka
2015	—	`conf`	Linearization of synthesizable VCO-based ADCs using delta modulation. ECCTD Vishnu Unnikrishnan, Mark Vesterbacka
2014	J	`jnl`	Time-Mode Analog-to-Digital Conversion Using Standard Cells. IEEE Trans. Circuits Syst. I Regul. Pap. Vishnu Unnikrishnan, Mark Vesterbacka