Agency for Science, Technology and Research

Po Shin Francois Chin

Zhongding Lei

Ying Chang Liang

Ying-Chang Liang

Yonghong Zeng

Anh Tuan Hoang

Zhiwei Lin

Xianming Qing

Xiaoming Peng

Nasimuddin

Ashok Kumar Marath

Khiam Boon Png

Yuen-Sam Kwok

Zhao Hui Cai

Bo Shi

A phased array antenna that maximizes antenna gain and minimizes or avoids grating/side lobes issues. The phased array antenna includes a receiver antenna array including one or more groups of receiver radiating elements, where each group of receiver radiating elements includes a first receiver subarray of receiver radiating elements and a second receiver subarray of receiver radiating elements. The phased array antenna further includes receiver core chips, including, for each of the one or more groups of receiver radiating elements, a first receiver core chip associated with the first receiver subarray and a second receiver core chip associated with the second receiver subarray. Additionally, the phased array antenna includes receiver feeding networks, including, for each of the one or more groups of receiver radiating elements, a first receiver feeding network including first feed lines and a second receiver feeding network including second feed lines.

Phased array antenna

In various embodiments of the present disclosure, there is provided a method for determining precoding matrixes for a communication of a first base station and a second base station with a first mobile station and a second mobile station. Precoding matrixes for a plurality of signal channels between the base stations and the mobile stations are determined based on a signal to noise ratio (SNR) consideration. Accordingly, the method can include determining a first set of precoding matrixes based on a predetermined consideration of SNR between the first base station and the second base station and the first mobile station and the second mobile station and generating a second set of precoding matrixes based on the first set of precoding matrixes. A corresponding system for carrying out a determination of precoding matrixes is provided.

Method for determining precoding matrixes for communication and a system therefrom

A decoding circuit including a data buffer comprises a plurality of storage elements for storing data symbols, a processing circuit comprising a plurality of inputs and outputs, wherein the processing circuitry is configured to process data symbols received via the plurality of inputs and outputs. First and second decoding parameters are determined by a decoding rule and wherein the first and the second decoding parameters are not changed throughout the decoding process.

Decoding circuit and encoding circuit

A method of transmitting data to a receiver, wherein the data is transmitted using a plurality of sub-carriers, is provided. The method provided includes determining, for each sub-carrier and for each of a plurality of combinations of the sub-carrier and an antenna of a plurality of antennas to be used for transmitting the data, a transmission characteristic of a transmission of the sub-carrier using the antenna; and selecting, for each sub-carrier, an antenna of the plurality of antennas to be used for the transmission of the sub-carrier based on the transmission characteristic of the transmission of the sub-carrier between the antenna and the receiver.

Method of transmitting data to a receiver

A method of determining available frequency ranges for at least one communication device is provided. The method comprises providing a downlink transmission time interval, determining available frequency ranges within a plurality of frequency ranges after the downlink transmission time interval, and providing an uplink transmission time interval after the determining of the available frequency ranges.

Method and devices for determining available frequency ranges

A method of allocating frequency ranges to at least one communication device is provided. The method comprises determining available frequency ranges within a plurality of frequency ranges, combining the available frequency ranges to at least one combined logical frequency range, and allocating the at least one combined logical frequency range to the at least one communication device.

Methods and devices for allocating frequency ranges

A method for decompressing at least two two-valued symbol sequences into a three-valued communication sequence is described comprising converting a first two-valued symbol sequence into an intermediate symbol sequence and symbol-wise multiplying the intermediate symbol sequence with the second two-valued symbol sequence to generate the three-valued communication sequence.

Method and system for decompressing at least two two-valued symbol sequences into a three-valued communication sequence

A code division multiple access downlink receiver for providing wireless communication via a wireless channel between a base station and a mobile station in which the receiver is implemented. The receiver comprises a plurality of subchannels of which each conveys at least one signal received from the base station, and a cell searcher for receiving signals in the plurality of subchannels and retrieving therefrom a common code relating to a cell. The receiver also comprises a code generator for generating a set of common and dedicated codes relating to at least one communication channel using the output of the cell searcher, and a plurality of equalizers for receiving the code generator output and equalizing the received signals in the plurality of subchannels, in which each of the plurality of equalizers includes a plurality of filters in which each of the plurality of filters corresponds to each of the plurality of subchannels, in which the length of each of the plurality of filters is lesser than the length of each of the plurality of subchannels.

Path diversity equalization CDMA downlink receiver

A scheme for selecting two beams in a switched beam antenna system for providing downlink communications in a downlink channel, the switched beam antenna system providing uplink reception and downlink transmission is described. The scheme involves selecting a pair of beams based on the uplink reception of the switched beam antenna system, and determining from the pair of beams a corresponding pair of orthogonal beams. The scheme also involves providing the pair of orthogonal beams as a pair of transmit beams for the downlink transmission of the switched beam antenna system.

Growing community of inventors

Singapore, Singapore

Po Shin Francois Chin