Hong Kong Applied Science and Technology Research Institute Company, Limited

Yaming Luo

Man Wai Kwan

Kong Chau Tsang

Xiangyu Liu

Yunxiang Yao

Yuxian Zhang

Eddy Chiu

Yun Hou

Kong Chau Eric Tsang

Yuyi Mao

Kanghao Jia

Ying Lun Tsui

Yiu Wing Edwin Chan

Shuaimin Jiang

Yanda Mou

Described is a method and device for detecting a DTX state at a UCI receiver in a wireless communication system. The method comprises receiving a linear block encoded signal on an uplink at said UCI receiver and processing the received signal after resource element (RE) demapping to generate a soft bit sequence {right arrow over (s)}. The method includes selecting a plurality of bits in said generated soft bit sequence {right arrow over (s)} as comparison bits and comparing said selected comparison bits to corresponding bits in a reconstructed soft bit sequence {right arrow over (r)}. The reconstructed soft bit sequence {right arrow over (r)} is generated from a plurality of bits selected as reconstruction bits in said generated soft bit sequence {right arrow over (s)}. A comparison or correlation metric is determined between the comparison bits and the corresponding bits in the reconstructed soft bit sequence {right arrow over (r)}, and a determination is made of the occurrence of a DTX state by evaluating the determined comparison or correlation metric.

Method and device for detecting partial discontinuous transmission (DTX) using bits reconstruction

Described is a method and device for detecting a discontinuous transmission (DTX) state or a partial DTX state at an uplink control information (UCI) receiver in a wireless communication system. The method comprises receiving a linear block encoded signal on an uplink (UL) at said UCI receiver and processing said signal after resource element (RE) demapping to obtain a soft bit sequence. The soft bit sequence is then transformed into multiple sub-sequences. Correlation metrics are determined for two or more of the multiple sub-sequences or two or more sub-sequence groups derived from the multiple sub-sequences or sequence segments derived from the sub-sequence groups. Then, a determination is made if a DTX state has occurred by evaluating the determined correlation metrics.

Method and device for detecting partial discontinuous transmission (DTX) using soft bits correlation

Described is a method and device for detecting a discontinuous transmission state (DTX) at an uplink control information (UCI) receiver device in a wireless communication system. The method involves receiving a linear block encoded signal on an uplink (UL) at said UCI receiver device and processing the received linear block encoded signal after resource element (RE) dernapping to obtain channel estimation data. The method includes determining from said channel estimation data a DTX metric for one or more selected resource blocks (RBs) and determining if a DTX state has occurred by comparing the determined DTX metric to a calculated, selected, or predetermined threshold.

Method and device for detecting partial discontinuous transmission (DTX) using channel estimation data

Described is a method of processing a signal received at an uplink control information (UCI) receiver in a wireless communication system. The method comprises processing a signal received on an uplink (UL) at said UCI receiver to transform said received signal into a likelihood calculation of possible transmitted codewords (&#x3b8;. . . &#x3b8;i . . . &#x3b8;) and determining a maximum magnitude &#x3b8;value from said likelihood calculation. The method includes comparing said maximum magnitude &#x3b8;value to a selected, calculated or predetermined scaled threshold S&#xb7;&#x3c4; where &#x3c4; is a threshold and S is a scaling factor for the threshold &#x3c4;. The comparison step is such that, where |&#x3b8;|&#x3e;S&#xb7;&#x3c4;, the method comprises determining that the signal received comprises a linear block encoded signal. In the method, prior to said comparison step, the scaling factor S is selected from a plurality of scaling factor options. One scaling factor option (i) is a scaling factor Sderived from a combination of estimated noise and/or signal power at an output of a resource element (RE) demapper module and an estimated channel response from/before an equalizer module of said UCI receiver. The options also include using a combination of Sand a suitable scaling factor derived excluding option (i).

Method and device for detecting discontinuous transmission (DTX) assisted by noise estimation

Described is a method and device for processing a signal received at an uplink control information (UCI) receiver in a wireless communication system. The method comprises processing a signal received on an uplink (UL) at said UCI receiver to transform said received signal into a likelihood calculation of possible transmitted codewords (&#x3b8;). The likelihood calculation of possible transmitted codewords (&#x3b8;) may comprise a multi-dimensional discrete Fourier transform (DFT) (&#x3b8;) of said received signal. The multi-dimensional may be formed as a Hadamard Transform. The method includes determining a maximum magnitude &#x3b8;value from said likelihood calculation of possible transmitted codewords (&#x3b8;) and then comparing said &#x3b8;value to a selected, calculated or predetermined scaled threshold c&#xb7;&#x3c4; where &#x3c4; is a threshold and c is a scaling factor for the threshold &#x3c4;. The comparison is such that, where &#x3b8;&#x3e;c&#xb7;&#x3c4;, it is determined that the signal received on the UL at said UCI receiver comprises a linear block encoded signal. In some cases, the scaling factor c may be omitted.

Method and device for detecting discontinuous transmission (DTX) for small block encoded signals

Described is a method of decoding a physical sidelink shared channel (PSSCH) involving physical sidelink control channel (PSCCH) resource grid search space reduction, timing offset (TO) estimation, and reference symbol identification. Resource grid search space reduction may include identifying resource blocks (RBs) having a signal power below a first threshold such that said RBs can be excluded from further processing. Search space reduction may additionally or alternatively include identifying RB pairs where a difference in signal power between the RBs comprising each pair of RBs is above a second threshold and excluding any such said RB pairs from further processing. TO compensation may include circularly correlating TO-compensated received DMRSs and their corresponding local DMRSs to obtain energy or power profiles. From the energy/power profiles, a subset L of highest stored power values and their corresponding cyclic shift (n) values can be chosen where said power values are equal to or exceed a third threshold. The selected subset L can be made available for use in a decoding process for a received channel signal.

Method of processing a received channel signal in a device to device communications link

The presently claimed invention relates generally to a method and an apparatus for pilot decontamination for massive MIMO system and, more particularly, to a massive MIMO communication system based on channel estimation with topological interference alignment.

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Hong Kong, China

Yaming Luo