Intel Corporation

Jiacheng Wang

Yuan Zhu

Yang-Seok Choi

Hujun Yin

Liang Jiang

Huaning Niu

Qinghua Li

Yang Tang

Alexei Vladimirovich Davydov

Xintian Eddie Lin

Gregory Vladimirovich Morozov

Yeong-Sun Hwang

Guangjie Li

Feng Zhou

Shanshan Zheng

Ismael Gutierrez

Xiaofeng Liu

Ahmed S Ibrahim

An enhanced Node B (eNB) for precoding is generally described. In some embodiments, a first precoding-matrix indicator (PMI) and a second PMI is received on an uplink channel from user equipment (UE). Symbols for multiple-input multiple output (MIMO) beamforming may be precoded by the eNB using a precoder matrix recommended by the first and second PMIs, for a MIMO downlink orthogonal frequency division multiple access (OFDMA) transmission. The first PMI and the second PMI are calculated by selecting a representative codeword that is indexed by i1 and i2 for a plurality of 2TX constituent beams, the 2TX constituent beam that provides the best system evaluation metric. The i1 index for wideband and the i2 index for each subband are identified from the defined 2TX constituent beam.

User equipment and codebook search method for 4Tx dual codebook (ran1)

An embodiment of the present invention provides a method used in transmit beam forming, comprising, providing differential feedback by using variable differential codebooks across a plurality of feedbacks wherein the differential codebooks may have different shapes, and/or spans, and/or the numbers of codewords across feedbacks.

Techniques utilizing step size adaptation for differential beamforming in wireless networks

An embodiment of the present invention provides a space-time block code (STBC) transmission method for 4 transmit antennas, comprising adding two 2&#xd7;2 orthogonal pre-coding before a two Alamouti transmission for a 4 transmit antennas scheme.

Full-rate, full-diversity space-time block code technique for multiple transmissions using simple linear decoding complexity

Briefly, in accordance with one or more embodiments, a midamble for a downlink subframe is generated by rotating an order of midamble tones per antenna between two or more subbands. A Golay sequence may be utilized in the modulation of one or more subcarriers of the midamble via a reuse-3 arrangement. Alternatively, a reuse-1 arrangement may be applied to the midamble.

Midamble for wireless networks

Embodiments of an apparatus and methods for transmission of timing and synchronization information for mobile WiMAX systems are generally described herein. Other embodiments may be described and claimed.

Transmission of preamble code for mobile WiMAX systems

Embodiments of MIMO symbol decoders and methods for decoding spatially multiplexed symbols using combined linear equalization decoding and maximum likelihood decoding are generally described herein. In some embodiments, one group of symbols (y) received through two or more spatial channels is decoded using a linear equalization decoding technique and another group of symbols is decoded using a maximum likelihood decoding (MLD) technique to generate a soft-bit output. The symbols may be grouped for either linear equalization decoding or MLD based on channel orthogonality or signal-to-interference and noise ratios (SINRs).

MIMO symbol decoder and method for decoding spatially multiplexed symbols using combined linear equalization and maximum likelihood decoding

Growing community of inventors

Beijing, China

Jiacheng Wang