Abstract: Methods, systems, and devices for multiple access with interference mitigation are described. An exemplary implementation of interference mitigation in a multiple access scheme includes rearranging a N-th bit stream corresponding to a N-th portion of the input bit stream to generate a N-th rearranged bit stream of K rearranged bit streams, for N=1, 2, . . . , K, generating a modulated symbol stream of hierarchical QAM symbols based on the K rearranged bit streams, where bits from the first rearranged bit stream correspond to one or more most significant bits of the hierarchical QAM symbols, bits from the K-th rearranged bit stream correspond to one or more least significant bits of the hierarchical QAM symbols, and bits from a second to (K?1)-th rearranged bit stream correspond to one or more remaining bits of the hierarchical QAM symbols, and transmitting a signal generated from the modulated symbol stream.

Abstract: According to various implementation, a wireless communication device applies a repetition code to a data stream; randomizes the data stream; multiplies the data stream by a random sequence; and transmits the data stream after the aforementioned signal processing as a wireless signal.

Abstract: Methods, systems, and devices for multiple access with interference mitigation are described. A wireless communication method is provided to comprise: generating, from information bits, a modulated signal; spreading the modulated signal using a spreading code to provide a spread data signal; processing the spread data signal through a randomization; and transmitting an orthogonal frequency division multiplexing (OFDM) signal based on an output of the processing.

Abstract: A data transmission method is provided. The method includes: a transmitter generates a transmission signal on the basis of transmission information and modulates, by means of a carrier modulation, the transmission signal to a target time-frequency resource for transmission.

Abstract: Provided are a message sending method and device, and an electronic device. The method includes: sending, by a first node, a message to a second node, wherein the message includes at least one of: a first reference signal carried on a first resource, or a data packet carried on a second resource; wherein the first reference signal belongs to a first reference signal set, and the first resource belongs to a first resource set; the second resource belongs to a second resource set; and the first resource set and the second resource set have a gap in a time domain, and the value of the gap is greater than or equal to 0.

Abstract: Methods, systems, and devices for multiple access with interference mitigation are described. A wireless communication method is provided to comprise: generating, from information bits, a modulated signal; spreading the modulated signal using a spreading code to provide a spread data signal; processing the spread data signal through a randomization; and transmitting an orthogonal frequency division multiplexing (OFDM) signal based on an output of the processing.

Abstract: Methods, systems, and devices for multiple access with interference mitigation are described. An exemplary implementation of interference mitigation in a multiple access scheme includes rearranging a N-th bit stream corresponding to a N-th portion of the input bit stream to generate a N-th rearranged bit stream of K rearranged bit streams, for N=1, 2, . . . , K, generating a modulated symbol stream of hierarchical QAM symbols based on the K rearranged bit streams, where bits from the first rearranged bit stream correspond to one or more most significant bits of the hierarchical QAM symbols, bits from the K-th rearranged bit stream correspond to one or more least significant bits of the hierarchical QAM symbols, and bits from a second to (K?1)-th rearranged bit stream correspond to one or more remaining bits of the hierarchical QAM symbols, and transmitting a signal generated from the modulated symbol stream.

Abstract: According to various implementation, a wireless communication device applies a repetition code to a data stream; randomizes the data stream; multiplies the data stream by a random sequence; and transmits the data stream after the aforementioned signal processing as a wireless signal.

Abstract: A data transmission method is provided. The method includes: a transmitter generates a transmission signal on the basis of transmission information and modulates, by means of a carrier modulation, the transmission signal to a target time-frequency resource for transmission.

Abstract: Provided are a message sending method and device, and an electronic device. The method includes: sending, by a first node, a message to a second node, wherein the message includes at least one of: a first reference signal carried on a first resource, or a data packet carried on a second resource; wherein the first reference signal belongs to a first reference signal set, and the first resource belongs to a first resource set; the second resource belongs to a second resource set; and the first resource set and the second resource set have a gap in a time domain, and the value of the gap is greater than or equal to 0.

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

Abstract: A base station used in a radio communication system includes a precoding matrix calculating unit that calculates a precoding matrix based on a first precoding matrix reported from a first user equipment in a pair selected as a target of multiplexing in a power region and a second precoding matrix reported from a second user equipment in the pair and a precoding unit that applies a precoding to transmission signals to the first user equipment and the second user equipment using the precoding matrix calculated by the precoding matrix calculating unit.

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

Abstract: Embodiments of the present invention provides an adaptive space-time coding and modulation method and a transmitter. In one embodiment, the method includes: obtaining a curve corresponding to a modulation mode, a channel coding rate, a coding mode of a space-time code, a parameter indicating signal transmission quality and SNR by simulating or measuring at transmit-side and making a table with correspondences between the SNR, the modulation mode and the coding mode of the space-time code according to a SNR range corresponding to a predefined signal transmission quality. Higher frequency spectrum efficiency can be achieved with the quality of service guaranteed.