Abstract: Techniques for wireless networking that include transmission and reception of signals using orthogonal time frequency space (OTFS) modulation techniques are disclosed. For example, a wireless access point may communicate with a station using OFDM modulated WiFi (OFDM-WiFi) at one time and using OTFS modulated WiFi (OTFS-WiFi) at another time. The OTFS-WiFi may provide improved throughput and coverage over OFDM-WiFi in static and mobile environments.

Abstract: Techniques for wireless networking that include transmission and reception of signals using orthogonal time frequency space (OTFS) modulation techniques are disclosed. For example, a wireless access point may communicate with a station using OFDM modulated WiFi (OFDM-WiFi) at one time and using OTFS modulated WiFi (OTFS-WiFi) at another time. The OTFS-WiFi may provide improved throughput and coverage over OFDM-WiFi in static and mobile environments.

Abstract: Techniques for wireless networking that include transmission and reception of signals using orthogonal time frequency space (OTFS) modulation techniques are disclosed. For example, a wireless access point may communicate with a station using OFDM modulated WiFi (OFDM-WiFi) at one time and using OTFS modulated WiFi (OTFS-WiFi) at another time. The OTFS-WiFi may provide improved throughput and coverage over OFDM-WiFi in static and mobile environments.

Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.

Abstract: Methods, systems and device for achieving synchronization in an orthogonal time frequency space (OTFS) signal receiver are described. An exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, calculating autocorrelation of the wireless signal using the wireless signal and a delayed version of the wireless signal that is delayed by a pre-determined delay, thereby generating an autocorrelation output, processing the autocorrelation filter through a moving average filter to produce a fine timing signal.

Abstract: Techniques for wireless networking that include transmission and reception of signals using orthogonal time frequency space (OTFS) modulation techniques are disclosed. For example, a wireless access point may communicate with a station using OFDM modulated WiFi (OFDM-WiFi) at one time and using OTFS modulated WiFi (OTFS-WiFi) at another time. The OTFS-WiFi may provide improved throughput and coverage over OFDM-WiFi in static and mobile environments.

Abstract: A method and apparatus for adaptive impulse noise detection and suppression (INDS) where information regarding detected impulse noise (IN) pulses is used to adjust detection and suppression parameters. To decrease the rate of false detection, groups of samples, instead of individual samples, of the digitized received signal are used to detect the presence of IN pulses. The method and apparatus for adaptive INDS may be used in communication systems employing single-carrier or multi-carrier modulation schemes, and is preferably used for Orthogonal Frequency Division Multiplexing (OFDM) modulation. The proposed adaptive INDS systems may be used to effectively reduce the effects of impulse noise and improve the quality of received signals.

Abstract: A method and apparatus for adaptive impulse noise detection and suppression (INDS) where information regarding detected impulse noise (IN) pulses is used to adjust detection and suppression parameters. To decrease the rate of false detection, groups of samples, instead of individual samples, of the digitized received signal are used to detect the presence of IN pulses. The method and apparatus for adaptive INDS may be used in communication systems employing single-carrier or multi-carrier modulation schemes, and is preferably used for Orthogonal Frequency Division Multiplexing (OFDM) modulation. The proposed adaptive INDS systems may be used to effectively reduce the effects of impulse noise and improve the quality of received signals.

Abstract: The present invention is directed to a method and system for detecting and compensating for signal impairments in modulated signals. Phase noise and gain noise based signal impairments can be detected as a function of the difference between the optimal position in the constellation grid (the center) and the actual position in the constellation grid of a received symbol. As symbols are received, they are compared to optimal positions and a measure of the phase noise and gain noise can be determined for each symbol. Over a period of time, the detector can compute an average measure of phase noise and gain noise. When the average measure of phase noise and/or gain noise reaches a predefined threshold, the detector can indicate a phase noise based and/or gain noise based signal impairment has been detected to the receiver. The receiver can adjust one or more receive parameters in order to improve reception.

Abstract: The present invention is directed to a method and system for detecting and compensating for signal impairments in modulated signals. Phase noise and gain noise based signal impairments can be detected as a function of the difference between the optimal position in the constellation grid (the center) and the actual position in the constellation grid of a received symbol. As symbols are received, they are compared to optimal positions and a measure of the phase noise and gain noise can be determined for each symbol. Over a period of time, the detector can compute an average measure of phase noise and gain noise. When the average measure of phase noise and/or gain noise reaches a predefined threshold, the detector can indicate a phase noise based and/or gain noise based signal impairment has been detected to the receiver. The receiver can adjust one or more receive parameters in order to improve reception.

Abstract: The present invention is directed to a method and system for detecting and compensating for signal impairments in modulated signals. Phase noise and gain noise based signal impairments can be detected as a function of the difference between the optimal position in the constellation grid (the center) and the actual position in the constellation grid of a received symbol. As symbols are received, they are compared to optimal positions and a measure of the phase noise and gain noise can be determined for each symbol. Over a period of time, the detector can compute an average measure of phase noise and gain noise. When the average measure of phase noise and/or gain noise reaches a predefined threshold, the detector can indicate a phase noise based and/or gain noise based signal impairment has been detected to the receiver. The receiver can adjust one or more receive parameters in order to improve reception.