Qualcomm Incorporated

Cisco Technology, Inc.

Tomer Geva

Shay Landis

Peer Berger

Jacob Pick

Idan Michael Horn

Adee Ofir Ran

Eran Nussbaum

Liran Brecher

Apparatus, methods, and computer program products for wireless communication are provided. An example method may include receiving a communication from a second wireless device. The example method may further include demodulating the communication based on a combination of lattice reduction (LR) and per-stream recursive demapping (PSRD). The method may further include transforming a first subset of received stream signals in the set of stream signals to a complex integer domain (Z domain) and processing, based on the LR, the first subset of received stream signals in the set of stream signals in the Z domain. The method may further include transforming the processed first subset of received stream signals in the set of stream signals in the Z domain to a set of X domain vectors in an X domain.

Combined lattice reduction and per-stream recursive demapping demodulation

Certain aspects of the present disclosure provide techniques for wireless communications by an apparatus. Certain techniques include sending an indication that the apparatus is capable of supporting lattice reduction (LR) demodulation; receiving a first LR transformation matrix (to be used for demodulating a modulated signal); and receiving the modulated signal.

Lattice reduction transformation matrix calculation and signaling

Methods, systems, and devices for wireless communications are described. A transmitting device or a receiving device may indicate support for crest factor reduction (CFR) techniques using clipping and mirroring. The transmitting device may indicate a clipping level and a mirroring level for a CFR function. The transmitting device may generate a waveform in accordance with the CFR function and may transmit the waveform to the receiving device. The receiving device may monitor the waveform to detect one or more mirrored portions of the waveform. The receiving device may invert the one or more mirrored portions of the waveform over the mirroring level to restore and decode the waveform.

Amplitude mirroring detection using additional shared information

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may generate a waveform having an original amplitude. The transmitting device may reduce a peak portion of the original amplitude that is above a mirror level according to a reduction function that is based at least in part on a difference function associated with a difference between the mirror level and the peak portion, to obtain a reduced peak amplitude for the waveform. The transmitting device may transmit the waveform with the reduced peak amplitude. Numerous other aspects are described.

Mirroring for amplitude reduction

Techniques and apparatus for optimizing transmitter equalization are described. An example technique includes capturing a single output signal transmitted from a port on at least one channel of a host device. An impulse response of the channel is determined based at least in part on the single output signal. A transmitter feedforward equalization (FFE) is generated, based at least in part on the impulse response of the channel. The transmitter FFE is applied to the channel of the port of the host device.

Growing community of inventors

Kiryat Ono, Israel

Tomer Geva