A transmission device includes a first mapper, a second mapper, a converter, a superposer, and a transmitter. The first mapper is configured to map a first bit stream of a first data series to generate a first modulated symbol stream. The second mapper is configured to map a second bit stream of a second data series to generate a second modulated symbol stream. The first modulated symbol stream and the second modulated symbol stream are representable on a complex plane extending in a first direction and a second direction. The converter is configured to convert the second modulated symbol stream in accordance with the first modulated symbol stream only in the first direction on the complex plane. The superposer is configured to superpose the first modulated symbol stream and the second modulated symbol stream converted by the converter, at an amplitude ratio, to generate a multiplexed signal.

Techniques and examples of channel multiplexing within interlace for New Radio (NR) unlicensed spectrum (NR-U) operation are described. An apparatus (e.g., user equipment (UE)) determines which sub-interlace of multiple sub-interlaces in each of a plurality of interlaces is assigned to the apparatus. The apparatus then performs an uplink (UL) transmission to a wireless network in an NR-U using the assigned sub-interlace in each of the plurality of interlaces. Each of the plurality of interlaces may be divided into respective multiple sub-interlaces with channel multiplexing.

A system for pulse based wideband signaling comprises a transmitter that performs physical layer encoding of both digital and analog data into a pulse repetition rate signal, and modulation of the pulse repetition rate signal into wideband radio frequency pulses, and transmission of the pulses as a wideband RF signal, a receiver that performs physical layer demodulation of the wideband RF signal into a pulse repetition rate signal, and decoding of the pulse repetition rate signal into digital and analog data, wherein the system provides improvement in controlling and balancing the variables of bandwidth, signal to noise ratio, range, and power consumption.

In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.

A communication device and a communication method are provided. The communication device includes: a processor configured to generate a Golay complementary set, and a modulator configured to modulate the Golay complementary set to a carrier. Herein, the generated Golay complementary set is generated by using an algebraic structure and has an elastic length, and is adapted to communication application such as channel estimation or signal synchronization.

Circuits for continuous-time analog correlators are provided, comprising: a first VCO that receives an input signal and that outputs a first pulse frequency modulated (PFM) output signal; a second VCO that receives a reference signal and that outputs a second PFM output signal; a first phase frequency detector (PFD) that receives the first PFM output signal and the second PFM output signal and that produces a first PFD output signal; a first delay cell that receives the first PFM output signal and that produces a first delayed signal (DS); a second delay cell that receives the second PFM output signal and that produces a second DS; a second PFD that receives the first DS and the second DS and that produces a second PFD output signal; and a capacitor-digital-to-analog converter (capacitor-DAC) that receives the first PFD output signal and the second PFD output signal and that produces a correlator output.

Aspects of the disclosure include an apparatus at base station side in a wireless communication system for multi-user superposition transmission. The apparatus includes a superposition control unit and an indication generation unit. The superposition control unit is configured to insert, into a data stream of each user equipment in a group of user equipment comprising a plurality of user equipment, a demodulation reference signal corresponding to the data stream, and superpose demodulation reference signals corresponding to data streams of respective user equipment. The indication generation unit is configured to generate, for at least a first user equipment among the plurality of user equipment, an indication regarding a demodulation reference signal corresponding to a data stream of other user equipment among the plurality of user equipment, to assist the first user equipment in demodulating data transmitted in the multi-user superposition transmission.

A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled by a first network to a first set of antennas residing on multiple geographically distributed wireless terminals in a mobile radio network. The first set of antennas is updated to produce a second set of antennas, and the first network is reconfigured to connect the MIMO subspace processing system to the second set of antennas. MIMO subspace processing is reconfigured to employ channel state information for the second set of antennas to generate a plurality of non-interfering subspace channels occupying a common frequency in the mobile radio network.

A transmission device includes a first mapper, a second mapper, a converter, a superposer, and a transmitter. The first mapper is configured to map a first bit stream of a first data series to generate a first modulated symbol stream. The second mapper is configured to map a second bit stream of a second data series to generate a second modulated symbol stream. The first modulated symbol stream and the second modulated symbol stream are representable on a complex plane extending in a first direction and a second direction. The converter is configured to convert the second modulated symbol stream in accordance with the first modulated symbol stream only in the first direction on the complex plane. The superposer is configured to superpose the first modulated symbol stream and the second modulated symbol stream converted by the converter, at an amplitude ratio, to generate a multiplexed signal.

The present disclosure relates to a communication method and system for converging a 5.sup.th Generation (5G) communication system for supporting higher data rates beyond a 4.sup.th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.

A method of a terminal in a wireless communication system is provided. The method includes identifying demodulation reference signal (DMRS) type information and DMRS symbol length information, identifying port number information for receiving a DMRS and receiving the DMRS based on the DMRS type information, the DMRS symbol length information and port number information, wherein the port number information indicates a port number for the terminal in DMRS information including parameters for code division multiplexing (CDM) group information, offset information, frequency-domain orthogonal cover code (OCC) information, and time-domain OCC information corresponding respectively to multiple port numbers, and wherein the DMRS information is defined per DMRS type.