12 results about "Dual carrier modulation" patented technology

The invention provides a single-phase inverter based on primary energy conversion and a modulation strategy thereof, and relates to the technical field of inverters. The single-phase inverter reuses the inductor and the filter capacitor in the Buck mode and the Boost mode, so that the proposed circuit topology only needs a single inductor and a single filter capacitor element, and compared with a traditional circuit with a two-stage structure, the number of the inductors and the number of the filter capacitors are reduced, and the power density is improved. Meanwhile, based on first-stage energy conversion, only a first-stage switching tube works at high frequency to perform energy conversion, and the efficiency is improved. The invention provides a dual-carrier modulation strategy with different amplitudes for the proposed primary energy conversion single-phase inverter topology. And smooth switching of the converter between the Buck mode and the Boost mode can be realized. And the frequencies of the two carriers can be adjusted, so that the Buck mode and the Boost mode of the converter have the same or different switching frequencies.

The present disclosure provides a communication apparatus and a communication method related to dual-stream dual-carrier modulation (DCM). The communication apparatus, during operation, includes a circuit configured to set first information indicating whether mapping of two or more modulation symbols modulated from information bits of a signal to two or more subcarriers is applied across two or more spatial streams of an orthogonal frequency division multiplexing (OFDM) symbol, and second information indicating whether data rate adjustment is applied to the signal, and a transmission unit configured to transmit a signal including the first information and the second information by using mapping of two or more modulation symbols across two or more spatial streams and / or data rate adjustment during operation.

The present disclosure provides a communication apparatus and a communication method for dual stream dual carrier modulation DCM), the communication apparatus comprising: circuitry, which, in operation, is configured to set first information indicating whether a mapping of two or more modulation symbols modulated from an information bit of a signal to two or more subcarriers is applied across two or more spatial streams of an orthogonal frequency division multiplexing (OFDM) symbol and second information indicating whether a data rate adjustment is applied to the signal; and a transmitter, which, in operation, transmits the signal with the mapping of the two or more modulation symbols across the two or more spatial streams and / or the data rate adjustment, the signal comprising the first information and the second information.

Provided in an embodiment of the present invention are a modulation signal generation method and device, a storage medium, an electronic device and a computer program product, the method comprising: according to a frequency domain resource occupied by a user, determining a value of a first subcarrier for bearing various preamble symbols of an initial modulation signal to be generated, determining a first index of a first effective subcarrier of the first subcarrier; generating a second index of a second subcarrier for bearing a signal field symbol of an initial modulation signal to be generated and data according to a predetermined interleaving mode and a dual carrier modulation (DCM) rule; selecting various symbols and data of a to-be-generated initial modulation signal according to a predetermined selection receiving mode, and correspondingly bearing the various symbols and data of the to-be-generated initial modulation signal on the first effective subcarrier and the second effective subcarrier based on the first index and the second index to obtain the initial modulation signal; and sequentially performing frequency domain processing and time domain processing on the initial modulation signal to obtain a target modulation signal.

The technology of this disclosure relates to a signal modulating method, a signal demodulating method, a device, a storage medium, and a program product. In the signal modulating method according to a first aspect of this disclosure, a sending device modulates a bit sequence onto a plurality of subcarriers through binary phase shift keying (BPSK) constellation point mapping, dual carrier modulation (DCM), and a duplication (DUP) operation, where the plurality of subcarriers include a first group of subcarriers and a second group of subcarriers. Then, the sending device changes a phase of first data carried in the first group of subcarriers by 90 degrees or minus 90 degrees, and further generates a modulation signal based on the first data that is carried in the first group of subcarriers and whose phase has been changed and second data carried in the second group of subcarriers.

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to tone mapping techniques and packet designs that support duplicate (or “DUP mode”) transmissions to multiple users. In some implementations, an access point (AP) may transmit a PPDU that includes first user data and second user data, where at least the first user data is transmitted in a DUP mode. As such, the first user data may be mapped to a number (N) of tones spanning a first RU in accordance with a dual carrier modulation (DCM) scheme, and a duplicate copy of the first user data may be mapped to N tones spanning a second RU in accordance with the DCM scheme. In some implementations, the second user data also may be transmitted in a DUP mode.

This technology provides proper communication when Dual Carrier Modulation (DCM) is applied to a Distributed-tone Resource Unit (DRU). [Solution] A communication device compliant with the IEEE 802.11 standard series has a transmission means that transmits an Information Element (IE) containing information indicating whether or not Dual Carrier Modulation (DCM) can be applied to a Distributed-tone Resource Unit (DRU).

This technology provides a way to appropriately apply Dual Carrier Modulation (DCM) to a Distributed Tone Resource Unit (DRU). [Solution] A communication device compliant with the IEEE 802.11 standard series, comprising a transmission means that modulates and transmits the same data using one first data subcarrier and one second data subcarrier belonging to each of the first and second groups, obtained by dividing the data subcarriers contained in one resource unit in which subcarriers are distributed across a distributed bandwidth into two groups, and then dividing them into two groups.

A wireless communication device and method are disclosed that are capable of optimizing uplink transmissions from a communication object to the wireless communication device. The method can be performed by the device and includes receiving an uplink performance estimate, determining uplink adjustment information including resource unit configuration and target received signal strength indication (target RSSI) based on the estimate, generating a target channel quality indicator based on previous uplink sounding information including channel quality indicator, RSSI and bandwidth, and based on the uplink adjustment information, wherein the previous uplink sounding information indicates characteristics of the uplink transmission, determining uplink transmission settings including modulation and coding scheme and dual carrier modulation settings based on the target channel quality indicator and a type of error correction technique, transmitting a control signal to the communication object based on the uplink transmission settings, and updating the uplink performance estimate based on a received signal from the communication object, wherein characteristics of the received signal are related to the uplink transmission settings.

A method performed by a wireless device to extend an effective transmission range of a physical layer protocol data unit (PPDU). The method includes transmitting a PPDU that includes a preamble and a data field, wherein the data field is transmitted in a plurality of distributed-tone resource units (dRUs) each carrying a same set of data symbols. A different mapping of the same set of data symbols to tone positions may be used in different ones of the plurality of dRUs to increase frequency diversity.

The present invention provides a single-phase inverter based on one-stage energy conversion and a modulation strategy thereof, and relates to the technical field of inverters. The single-phase inverter of the present invention reuses inductors and filter capacitors in Buck mode and Boost mode, so the proposed circuit topology only requires a single inductor and filter capacitor component, which reduces the number of inductors and filter capacitors compared to the traditional two-stage structure circuit, and improves the power density. At the same time, based on the one-stage energy conversion, the present invention only has one-stage switching tube working at a high frequency to perform energy conversion, thereby improving efficiency. The present invention proposes a dual-carrier modulation strategy with different amplitudes for the proposed one-stage energy conversion single-phase inverter topology. Smooth switching of the converter between Buck mode and Boost mode can be achieved. The frequencies of the two carriers can be adjusted so that the Buck mode and Boost mode of the converter have the same or different switching frequencies.

This technology provides proper communication when Dual Carrier Modulation (DCM) is applied to a Distributed-tone Resource Unit (DRU). [Solution] A communication device compliant with the IEEE 802.11 standard series has a transmission means that transmits a frame that includes information requesting the application of Dual Carrier Modulation (DCM) to a Distributed-tone Resource Unit (DRU) and requests data transmission to another communication device.