Systems and methods are disclosed for performing training using superimposed pilot subcarriers to determine training data. The training includes starting with a training duration (T) equal to a number of antennas (M) and running a Convolutional Neural Network (CNN) model using training samples to determine if a testing variance meets a predefined threshold. When the testing variance meets a predefined threshold, then reducing T by one half and repeating the running Convolutional Neural Network (CNN) model until the testing variance fails to meet the predefined threshold. When the testing variance fails to meet the predefined threshold, then multiplying T by two and using the new value of T as the new training duration to be used. Generating a run-time model based on the training data, updating the run-time model with new feedback data received from a User Equipment (UE), producing a DL channel estimation from the run-time model; and producing an optimal precoding matrix from the DL channel estimation.

A wireless communication technique to improve channel estimation using pilot signals includes receiving data symbols for transmission over a wireless communication channel using multiple antenna ports, generating a plurality of scrambling sequences, each corresponding to one of the multiple antenna ports, mapping, for each antenna port, a corresponding pilot signal to time and frequency transmission resources using a corresponding scrambling sequence, multiplexing a first input from the data symbols and a second input from the mapping of the corresponding pilot signal to generate an output signal, and transmitting the output signal over a wireless communication channel.

A signal processing device includes: a transmission path estimator that estimates a first transmission path characteristic of a transmission signal using a vertical signal out of vertical and horizontal signals resulting from being received by a vertical polarization antenna and a horizontal polarization antenna; a transmission path estimator that estimates a second transmission path characteristic of the transmission signal using the horizontal signal; a weight calculator that calculates a first weight for the vertical signal and a second weight for the horizontal signal, using the first transmission path characteristic and the second transmission path characteristic; and a weighting applier that applies weighted summation to the vertical signal and the horizontal signal using the first weight and the second weight.

A clock data recovery (CDR) mechanism qualifies symbols received from the data detector prior to using those symbols to compute a timing gradient. The disclosed CDR mechanism analyzes one or more recently received symbols to determine whether the current symbol should be used in computing the time gradient. When configured with a Mueller-Muller phase detector, the timing gradient for the received signal is set to zero if the current symbol is a 2 or a +2 and the previous symbol is non-zero. Otherwise, the Mueller-Muller timing gradient is evaluated in the traditional manner. When configured with a minimum mean-squared error phase detector, the timing gradient for the received signal is set to zero if the previous symbol is non-zero. Otherwise, the minimum mean-squared error timing gradient is evaluated in the traditional manner.

A wireless device includes first and second analog radio modules, first and second medium access control modules configured to control access to a digital network via the first and second analog radio modules, respectively, first and second baseband modules configured to convert between analog signals at the first and second analog radio modules, respectively, and digital signals at the first and second medium access control module, respectively, and circuitry configured to selectably coordinate the first and second medium access control modules to create a single-channel configuration for use by the wireless device to transmit and receive radio signals over a wireless interface, by setting the first and second analog radio modules to operate on a common frequency, and by commonly controlling the first and second baseband modules to convert common packets between analog and digital signals transmitted to or received from respective medium access control modules.

This disclosure relates to techniques for performing ranging wireless communication in a secure manner. A first wireless device may receive a plurality of independent sequences from a second wireless device. The first wireless device may perform a combined channel estimate using the sequences. The first wireless device may estimate the distance (or angle/direction, among various possibilities) between the two devices based on the combined channel estimate.

Disclosed is an electronic device, including a housing, a first communication circuit disposed in the housing and configured to support omnidirectional wireless communication, a second communication circuit disposed in the housing and configured to support directional wireless communication using beamforming, a processor disposed in the housing and operatively coupled to the first communication circuit and the second communication circuit, and a memory disposed in the housing and operatively coupled to the processor. The processor may be configured to receive at least one first radio signal through a communication channel from an external device capable of supporting the omnidirectional wireless communication and the directional wireless communication using the first communication circuit, determine a state of the communication channel based on at least part of the at least one first radio signal, and activate the second communication circuit based on at least part of the determined state of the communication channel wherein the second communication circuit is configured to receive a second radio signal from the external device.

The present disclosure relates to a state feedback decoder based channel estimating method including: calculating a first output bit when an input bit is 0 and a second output bit when an input bit is 1 using convolution encoder state information received from a determining unit; configuring a first virtual pilot and a second virtual pilot through modulation by receiving the first output bit and the second output bit; deinterleaving an i-th (here, i refers to a natural number corresponding to the number of OFDM symbols from 1) OFDM symbol; estimating a first channel and a second channel based on the first virtual pilot and the second virtual pilot using an output value in accordance with the deinterleaving result and calculating a first mean square error (MSE) and a second MSE; and comparing the calculated first MSE and second MSE to determine an input bit having a lower MSE as a reception bit by the determining unit and updating and feedbacking the convolution encoder state information using the determined reception bit.

Facilitating the reduction and/or mitigation of spatial emissions in a multi antenna wireless communications system is provided herein. A system can comprise a memory that stores executable instructions that, when executed by a processor, facilitate performance of operations that can comprise applying a first signal linearization to a first output signal of a first power amplifier based on a determination that an adjacent channel leakage ratio of the first output signal of the first power amplifier fails to satisfy a defined output value. The operations can also comprise applying a second signal linearization to a group of output signals of a group of power amplifiers for a defined azimuth direction associated with channel frequencies of the group of output signals and applying a third signal linearization to the group of output signals for a defined elevation direction associated with the channel frequencies of the group of output signals.

Disclosed is an electronic device, including a housing, a first communication circuit disposed in the housing and configured to support omnidirectional wireless communication, a second communication circuit disposed in the housing and configured to support directional wireless communication using beamforming, a processor disposed in the housing and operatively coupled to the first communication circuit and the second communication circuit, and a memory disposed in the housing and operatively coupled to the processor. The processor may be configured to receive at least one first radio signal through a communication channel from an external device capable of supporting the omnidirectional wireless communication and the directional wireless communication using the first communication circuit, determine a state of the communication channel based on at least part of the at least one first radio signal, and activate the second communication circuit based on at least part of the determined state of the communication channel wherein the second communication circuit is configured to receive a second radio signal from the external device.