Embodiments include devices and methods that improves quality in radio transmission/reception using a single-carrier scheme and/or a multi-carrier scheme.

Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into 1 or 0. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated.

A multiresolution coding and modulation system for preserving audio continuity in a digital wireless audio system in harsh RF environments is provided that includes an audio codec that produces codewords having bits differing in perceptual importance coupled with a non-uniform hierarchical modulation scheme. When the wireless audio system is operating in a harsh RF environment, the RF SNR for decoding bits having a high perceptual importance may be decreased while the RF SNR for decoding bits having a low perceptual importance may be increased, while having no adverse effect on the latency of the wireless audio system. The audio may be subjectively degraded instead of muting the audio, which mitigates intermittent interference and multipath fading issues.

An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, type information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.

The present invention discloses a superposition coding method, apparatus, and system, The method of the present invention includes: generating a superposition coding signal according to bit data to be separately sent to the at least two user equipments (UEs); sending notification signaling to at least one UE in the at least two UEs, where the notification signaling carries data selection information, and the data selection information is used for instructing the UE to acquire, from bit data demodulated from the superposition coding signal, at least one bit of data that is of a specific quantity and at a specific location as received data; and sending the superposition coding signal to the at least two UEs. The present invention is mainly applied in a demodulation process of a superposition coding signal.

Systems described herein receive, via a physical random access channel, an attach request from a user device; retrieve profile data for the user device; and determine, based on RF conditions estimated from the attach request, an initial downlink repetition level for extended coverage. The systems also receive a reference signal from the user device via a physical uplink shared channel; determine an uplink repetition level for coverage extension based on the uplink RF conditions and requirements from the profile data. The systems detect high resource use within a cell; identify a shared downlink resource channel for the user device, wherein machine-type communication (MTC) data for the user device uses BPSK modulation; identify non-MTC data requiring downlink transmission to a device within the cell; and send the non-MTC data over the shared downlink resource channel, and on a resource pre-allocated for the user device, using a different modulation level.

A wireless communication system and method. The system includes processing circuitry, and a transceiver coupled to the processing circuitry. The processing circuitry includes logic to generate a wake-up packet addressed to another wireless communication system and including a legacy preamble portion and a wake-up portion, the legacy preamble portion modulated according to a first modulation rate. The wake-up portion is modulated according to a second modulation rate lower than the first modulation rate and includes information to wake-up the other wireless communication system. The transceiver system is to transmit the legacy preamble using a first transmit power level, and to transmit the wake-up portion using a second transmit power level higher than the first transmit power level by a predetermined amount such that an average received power of the wake-up portion is equal to an average received power of the legacy portion at the third-party station.

In accordance with various aspect of the present disclosure, apparatus may transmit a first data resource element for a first UE on a base layer. The first UE is unconfigured for NOMA communication. The apparatus may also transmits data for a second UE on an enhancement layer. The second UE is configured for NOMA communication. Additionally, the base layer is overlayed with the enhancement layer. The reference signal may include a cell specific reference signal. The apparatus may be further configured to receive a traffic power ratio for the second UE to be followed by the second UE when the second UE is a base layer UE in a NOMA communication.

According to an example aspect of the present disclosure, there is provided an apparatus comprising memory configured to store a set of probabilities of transitions between modulation symbols, the set of probabilities corresponding to a lower peak-to-average power ratio than a set of equal probabilities of transitions between modulation symbols, distribution matcher circuitry configured to process an input bit sequence into a symbol sequence, wherein frequencies of transitions between symbols in the symbol sequence conform to probabilities in the set of probabilities, a channel coder configured to generate parity bits of unity and negative unity from bit information obtained from the symbol sequence, grouping circuitry configured to assign symbols of the symbol sequence into groups each comprising two or more symbols, and multiplication circuitry configured to multiply each one of the groups with a corresponding one of the parity bits.

A method and an apparatus for performing a Superposition Coded Modulation (SCM) scheme in a broadcasting or communication system including a controller are provided. The method includes controlling an SCM coefficient by the controller. The SCM coefficient is controlled according to a channel capacity of each layer of one or more layers in which information included in a signal is encoded.