Corning Research & Development Corporation

Quantenna Communications, Inc.

Ani Acquisition Sub, LLC

Evgenii Pustovalov

Benjamin Imanilov

Shirish Nagaraj

Deepak Pengoria

Sigurd Schelstraete

Hossein Dehghan

Andrey Kobyakov

Hsien Li Woo

Viacheslav Viacheslavovich Ivanov

Signal compression and noise shaping in a wireless communications system (WCS) is provided. Herein, a block compression circuit is integrated with a noise shaping circuit to concurrently perform downlink/uplink signal compression and noise shaping in the WCS. The block compression circuit performs block scaling compression on the downlink/uplink signal, which can cause a compression noise being distributed across an entire sampling bandwidth of the downlink/uplink signal. As such, the noise shaping circuit is configured to redistribute the compression noise from the entire sampling bandwidth to a selected portion of the sampling bandwidth. Accordingly, the redistributed compression noise can be effectively suppressed and/or filtered out when the downlink/uplink signal is received and decompressed. By concurrently performing block compression and noise shaping on the downlink/uplink signal, it is possible to achieve a good trade-off between compression ratio and latency, without compromising quality metrics of the downlink/uplink signal.

Signal compression and noise shaping in a wireless communications system (WCS)

Beamforming codebook synthesis in a wireless communications system (WCS) is provided. A wireless node simultaneously emits multiple reference beams in a coverage area based on a set of codewords that is optimized for a specific number of antenna elements in an antenna array. The wireless node may need to emit the reference beams using a different number of the antenna elements in the antenna array. Herein, the wireless node is configured to determine a different set(s) of codewords that is fine tuned for forming an identical number of the reference beams from a different number of the antenna elements and steered toward identical directions. In addition, the wireless node can dynamically select an appropriate set of codewords in response to different operating conditions. As such, it is possible to switch transparently, from both wireless node and end user perspectives, between different antenna array configurations under different operating conditions.

Beamforming codebook synthesis in a wireless communications system (WCS)

Multi-beam uniform coverage in a coverage cell(s) in a wireless communications system (WCS) is provided. The WCS includes a number of wireless devices that are typically mounted on a fixed structure to provide coverage for user devices. Each wireless device includes one or more antenna arrays. Each antenna array is controlled via a set of codewords to form one or more RF beams to each cover a respective area in a coverage cell. The codewords are predetermined based on fairness and/or leakage constraints such that the RF beams can be formed in desired geometric shapes and steered toward desired directions to provide a uniform coverage in the coverage cell. By forming the RF beams based on the codewords predetermined based on fairness and/or leakage constraints, it is possible to ensure an equal RF power signal level inside the coverage cell and/or reduced power leakage outside the coverage cell.

Multi-beam uniform coverage in a coverage cell(s) in a wireless communications system (WCS)

Systems and methods for compression and decompression between elements of a wireless communications system (WCS) such as a distributed antenna system (DAS) contemplate performing a fast Fourier transform (FFT) operation before compression and transmission across a transport medium in a DAS. Further, a size of an FFT block may be varied based on latency requirements. For example, the FFT block size may be based on a sampling rate extracted from channel information. By selecting the FFT block size to meet latency requirements, overall throughput across the transport medium may be increased.

Compression and decompression between elements of a wireless communications system (WCS)

A WAP including: a spatial mapper component, a partial sounding feedback expander circuit and a beamforming matrix calculator. The spatial mapper component spatially maps the transmission of a single MIMO sounding packet with either a single full spatial mapping matrix (SMM) or a set of 'N' partial SMM responsive respectively to a full or composite sounding mode designation. The partial sounding feedback expander circuit in the composite sounding mode, expands partial sounding feedback received from a targeted station in response to the single MIMO sounding packet into a full sounding feedback. The beamforming matrix calculator calculates a full beamforming matrix for transmitting downlink communications to the targeted station from the full sounding feedback provided by either the partial sounding feedback expander circuit in the composite sounding mode, or the full sounding feedback received directly from the targeted station in the full sounding mode.

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Saint-Petersburg, Russia

Evgenii Pustovalov