This disclosure provides channel estimation methods and apparatuses. One method includes: determining Ps initial sample channel matrices that indicate channel states, where the Ps initial sample channel matrices include P1 first sample channel matrices and Ps-P1 second sample channel matrices, the P1 first sample channel matrices are determined based on a previous sample channel matrix or a given reference signal, and Ps is an integer greater than 1; and determining a channel matrix based on the Ps initial sample channel matrices, and obtaining a channel estimation result. Because the P1 initial sample channel matrices in the Ps initial sample channel matrices are determined based on the previous sample channel matrix or the given reference signal, an initial channel estimation result may be provided as an iterative initial sample channel matrix.

Disclosed are a data processing method and apparatus. The method includes: a first receiving end determines a range of a data demodulation reference signal (DMRS) ports occupied by one or more second receiving ends by using at least one of the following information: a usage state of a joint encoding table corresponding to a DMRS port group, the number of layers corresponding to a physical downlink shared channel (PDSCH) of the first receiving end, and the number of codewords corresponding to the PDSCH of the first receiving end; and the first receiving end processes data according to the range of the DMRS ports occupied by one or more second receiving ends.

A method and system for maximizing throughput and minimizing latency in a communication system that supports heterogeneous links is presented. The communication system supports a primary link and an alternate link, and the method and system leverage the alternate link to reduce the overhead transmitted over the primary link, thereby increasing throughput and reducing end-to-end latency. The higher latency alternate link provides a delayed version of an information signal that corresponds to a portion of the information signal that is transmitted on the primary link. The received samples from the primary and alternate links may be used to equalize subsequent portions of the information signal received over the primary link, and may also be used for synchronization, timing recovery, DC offset removal, I/Q imbalance compensation, and frequency-offset estimation.

A method and a device for transmitting and receiving data in a wireless communication system are disclosed. In an embodiment the method includes receiving transmission data, dividing the received transmission data into K>1 data streams, where K is a positive integer, feeding each data stream into its associated parallel processing path so as to obtain K modulated data packets j=1, . . . , K from the parallel processing paths, wherein in each processing path the method further includes segmenting the data stream, encoding the segmented data stream with a first error detection code and modulating the error detection encoded segmented data stream so as to obtain a modulated data packet j comprising a plurality of modulated symbols. The method further includes multiplexing the K modulated data packets so that at least one modulated symbol of each modulated data packet j are placed in proximity to each other in time and/or frequency.

The invention relates to a method for channel estimation in a wireless communication system. The communication system includes a communication unit provided with a plurality of antennas, and one or more terminals. First, pilot signals are transmitted from each antenna towards the one or more terminals. At the terminals correlative coding is performed with respect to the transmitted pilot signals to form correlatively coded pilot signals. The correlatively coded pilot signals are then retransmitted from the one or more terminals to the plurality of antennas of the communication unit. The communication unit then estimates uplink channels between the one or more terminals and the plurality of antennas based on the correlatively coded pilot signals. Finally, estimates of the downlink channels between the plurality of antennas and the one or more terminals are obtained based on the estimated uplink channels.

The UE allocates a slot group including a number of consecutive slots based on an operating subcarrier spacing. The UE receives a configuration allocating blind detections over non-overlapping CCEs in the slot group among a group of component carriers of the UE using the operating subcarrier spacing. The UE performs, in the slot group, a next set of blind detections over a next set of non-overlapping CCEs on a given component carrier of the group of component carriers in accordance with the configuration, when (a) a total number of blind detections that would have been performed in the slot group by the UE does not exceed a limit of total blind detections and (b) a total number of non-overlapping CCEs that would have been monitored in the slot group by the UE does not exceed a limit of total non-overlapping CCEs.

A method and apparatus for enhancing channel estimation by using a binary tree based PDCCH search space in a new radio wireless communication system is disclosed. For example, a UE may identify an aggregation level profile having an aggregation level value for one or more aggregation levels, wherein each aggregation level corresponds to a respective number of resources to use for decoding a PDCCH, determine one or more decoding candidates for the UE from among a plurality of available decoding candidates defined as nodes in a binary tree for a search space based on the aggregation level profile, determine respective CCEs corresponding to each of the one or more decoding candidates, each respective CCE including one or more REGs, and performing channel estimation for each of the respective CCEs for use in demodulating and decoding downlink control information for the UE in the PDCCH.

Methods, systems, and devices for wireless communications are described. The described techniques support blind common phase error (CPE) and residual carrier frequency offset mitigation. Generally, the described techniques provide for blind CPE mitigation at a receiving device without a phase tracking reference signal (PTRS) associated with less overhead and improved performance as compared to use of a PTRS to mitigate CPE. A receiving device may receive a shared channel message in a scheduled shared channel allocation in accordance with a PTRS configuration that omits a PTRS allocation based on a capability of the receiving device to apply blind CPE mitigation for shared channel receptions. In some examples, with a single DMRS symbol allocation, blind CPE mitigation for each subsequent data symbol of a shared channel message may be based on the blind CPE estimation for the previous symbol, which may enable robust mitigation of a residual carrier frequency offset.

A wireless data reception method for receiving orthogonal frequency division multiplexing (OFDM) signal includes determining that an interfering signal is present, along with a serving cell signal, in the OFDM signal on the shared downlink channel, determining an estimate of a transmission structure of the received interfering signal, wherein the transmission structure is defined by a plurality of transmission parameters, classifying the estimate of the transmission structure as belonging to a subgroup from a plurality of possible subgroups in a dynamic order, estimating, in a priority order, at least some of the plurality of transmission parameters of the estimate of the transmission structure, and performing further receiver-side processing of the serving cell signal by subtracting contribution of the interfering signal from the OFDM signal based on the estimate of the transmission structure and a result of the estimating step.

An apparatus for a transceiver of a mobile communication system includes an interface configured to obtain receive signal information. The apparatus further includes a control module configured to determine a first cell identifying information of the mobile communication system based on the receive signal information, and configured to estimate an interfering signal information transmitted by a second cell of the mobile communication system based on the receive signal information. The interfering signal comprises control or payload data information of a second transceiver. The control module is further configured to detect a synchronization signal information transmitted for the cell based on the receive signal information and the interfering signal information. The control module is further configured to identify the first cell identifying information based on the synchronization signal information.