Inventor

NARASIMHAN RAVI

US119 patents

⚠️ This page may combine multiple inventors who share the name “NARASIMHAN RAVI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NARASIMHAN RAVI

VITAL CONNECT INC

Detection of sleep apnea using respiratory signals

Respiratory rate measurement using a combination of respiration signals

Contextual heart rate monitoring

Measuring psychological stress from cardiovascular and activity signals

Measuring psychological stress from cardiovascular and activity signals

Determining a time period a person is in bed

Calibration of a chest-mounted wireless sensor device for posture and activity detection

Low-distortion ECG denoising

Detection of sleep apnea using respiratory signals

Adaptive selection of digital egg filter

Signal quality metric for cardiovascular time series

Determining body postures and activities

Low-distortion ECG denoising

Psychological acute stress measurement using a wireless sensor

Respiratory rate measurement using a combination of respiration signals

Measuring psychological stress from cardiovascular and activity signals

Automated sleep staging using wearable sensors

Adaptive selection of digital ECG filter

Calibration of a chest-mounted wireless sensor device for posture and activity detection

Sleep apnea syndrome (SAS) screening using wearable devices

Measuring psychological stress from cardiovascular and activity signals

Measuring psychological stress from cardiovascular and activity signals

Determining a time period a person is in bed

MARVELL INT LTD

Circuits, architectures, systems, methods, algorithms and software for reducing contention and/or handling channel access in a network

Multicarrier transmit diversity

Method and apparatus for acquistion and tracking of orthogonal frequency division multiplexing symbol timing, carrier frequency offset and phase noise

Apparatus and method for measuring signal quality of a wireless communications link

MIMO-OFDM receiver processing with frequency and channel estimation

Rate adaptation in wireless systems

Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications

Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks

Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset

Apparatuses and method for mapping bits of orthogonal frequency division multiplexing symbols to subcarriers and compensating for an imbalance between in-phase and quadrature-phase signals

Scalable MIMO-OFDM PHY for high throughput WLANs

Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications

Adaptively determining a data rate of packetized information transmission over a wireless channel

Scalable space-frequency coding for MIMO systems

Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks

MIMO-OFDM preamble for channel estimation

Spatial multiplexing with antenna and constellation selection for correlated MIMO fading channels

NARASIMHAN RAVI

Data rate adaptation in multiple-in-multiple-out systems

Carrier frequency offset and doppler frequency estimation and correction for OFDMA and SC-FDMA

Determining respiratory rate via impedance pneumography

Method and system for fall detection of a user

Posture calibration for activity monitoring

Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks

KATHREIN WERKE KG

Space-time and space-frequency hopping for capacity enhancement of mobile data systems

METAWAVE COMM CORP

Simultaneous forward link beam forming and learning method for mobile high rate data traffic

TRUSTEES OF THE LELAND STAMFOR

Method for handoff in wireless communication systems using pattern recognition

QUANTENNA COMMUNICATIONS INC

Interference-cognitive transmission