Huawei Technologies Co., Limited

O-net (usa) Inc.

Zhipeng Zhao

Ramin Khayatzadeh

Hongqiang Bao

Ganghua Yang

Huijian Zhang

Liang Chen

Wai Kong Raymond Leung

Ingmar Land

Jiangqing Lei

Zining Huang

Zhigang Zhou

Marc Fossorier

Qingdong Guo

Qinrong Yu

Chunmeng Wu

The present application is directed a short distance free space optical communication link system. The system includes optical transmitter, receiver, beam expander, Rx lens and auxiliary alignment system.

Free-space optical link

This application provides an example base station for an example wireless communication network and an example method. One example base station includes a central unit and a remote radio unit (RRU). The RRU includes one or more antennas. The RRU is coupled to the central unit via one or more optical transmission fibers. Each optical transmission fiber defines a respective downlink transmission channel for transmitting a respective downlink transmission signal from the central unit to the respective antenna of the RRU. The RRU is configured to provide a respective uplink feedback signal based on the respective downlink transmission signal via an uplink feedback channel to the central unit.

Base station and a method for operating the base station

A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.

Remote radio unit and central unit for multiple-input multiple-output system

The present disclosure provides a code generator for generating an {N', K&#x2032;} code for encoding and/or decoding data transmitted in a communication channel from an {N, K} code, wherein N and N&#x2032; are code lengths, K and K&#x2032; are code dimensions. The code generator is configured to shorten the {N, K} code to obtain an intermediate code, and to extend the intermediate code to obtain the {N&#x2032;, K&#x2032;} code. The present disclosure also provides a corresponding code construction method. Further, the present disclosure provides a device for encoding and/or decoding data transmitted in a communication channel, the device being configured to encode and/or decode the data based on an {N&#x2032;, K&#x2032;} code generated from the {N, K} code.

Channel code construction for decoder reuse

A remote radio unit is for a base transceiver station. The remote radio unit includes: a noise generator configured to provide a RF noise signal having predefined statistical properties; a communication interface configured to transmit the RF noise signal as a stimulus signal over a radio-over-fiber uplink channel between the remote radio unit and a central unit of the base transceiver station for determining a pre-distortion of a target signal to be transmitted by the remote radio unit. The communication interface is further configured to receive the pre-distorted target signal over a ROF downlink channel between the remote radio unit and the central unit of the base transceiver station. The remote radio unit also has an antenna for transmitting the pre-distorted target signal received by the communication interface.

Remote radio unit and a central unit for a base transceiver station

Growing community of inventors

Shenzhen, China

Zhipeng Zhao