Pulse generation circuitry includes edge generation circuitry and edge combination circuitry. The edge generation circuitry includes a first digital-to-time converter (DTC) configured to input a first phase signal that includes a first phase edge and a second phase signal that includes a second phase edge. The edge generation circuitry is configured to generate a first pulse edge signal comprising a first pulse edge at a selected location between the first phase edge and the second phase edge. The edge combination circuitry is configured to combine the first pulse edge signal and a second pulse edge signal including a second pulse edge to generate a pulse signal.

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, (precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed.

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, (precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed.

This application relates to the field of wireless communications technologies, and in particular, to a data processing method, apparatus, and system. This application provides a data processing method. A data sending device modulates a to-be-transmitted bit sequence, splits a real part and an imaginary part of a complex-valued symbol that is obtained through the modulation into two symbols to form a symbol sequence, performs phase rotation of symbols in the symbol sequence, and performs sending by using a single carrier frequency division multiple access (SC-FDMA) symbol. This application is intended to reduce a peak-to-average power ratio (PAPR) of a transmit signal of an orthogonal frequency division multiplexing (OFDM) system by splitting a real part and an imaginary part of a to-be-transmitted signal, and improve link quality of an entire transmission system.

This application relates to the field of wireless communications technologies, and in particular, to a data processing method, apparatus, and system. This application provides a data processing method. A data sending device modulates a to-be-transmitted bit sequence, splits a real part and an imaginary part of a complex-valued symbol that is obtained through the modulation into two symbols to form a symbol sequence, performs phase rotation of symbols in the symbol sequence, and performs sending by using a single carrier frequency division multiple access (SC-FDMA) symbol. This application is intended to reduce a peak-to-average power ratio (PAPR) of a transmit signal of an orthogonal frequency division multiplexing (OFDM) system by splitting a real part and an imaginary part of a to-be-transmitted signal, and improve link quality of an entire transmission system.

The present technology relates to a transmission method and a reception device for securing favorable communication quality in data transmission using an LDPC code. In group-wise interleaving, the LDPC code with a code length N of 69120 bits is interleaved in units of 360-bit bit groups 0 to 191. In group-wise deinterleaving, a sequence of the LDPC code after group-wise interleaving is returned to an original sequence. The present technology can be applied, for example, in a case of performing data transmission using an LDPC code, and the like.

To provide a correction method of resolver correction device and resolver correction device that can reduce rotation angle (the rotation speed) detection error caused by resolver. An excitation signal supply circuit supplies an excitation signal of an excitation frequency to the resolver during a normal operation, for supplying the excitation signals of a plurality of frequencies including the excitation frequency to the first phase shifter or the second phase shifter during a calibration operation. A shift amount searching circuit searches the first shift amount setting value for each frequency of the excitation signal such that the first shift amount becomes 45 degrees, and the second shift amount setting value for each frequency of the excitation signal such that the second shift amount becomes 135 degrees, while referring to the detection result of the phase difference detection circuit during the calibration operation, and stores in the correction table.

The method comprising: applying, by a transmitter, a Forward Error Correction to an information block to be sent to a receiver and modulating said information block prior to its transmission, wherein the transmitter has knowledge of a channel frequency response seen by the receiver and the applying and modulating are performed at a variable-rate, at the transmitter side, by: transforming the information block into a number of smaller packets denoted as codeblocks fitting the input sizes accepted by the Forward Error Correction; selecting, a set of modulation and coding schemes to be independently applied to each of the codeblocks; including, information about the selected set of modulation and coding schemes within part of physical resources devoted to user data by reserving specific subcarriers and OFDM symbols; and mapping, said information within physical resources devoted to user data and not reserved for said selected set of modulation and coding schemes, first in order of ascending OFDM symbols and then of ascending subcarriers.

The method comprising: applying, by a transmitter, a Forward Error Correction to an information block to be sent to a receiver and modulating said information block prior to its transmission, wherein the transmitter has knowledge of a channel frequency response seen by the receiver and the applying and modulating are performed at a variable-rate, at the transmitter side, by: transforming the information block into a number of smaller packets denoted as codeblocks fitting the input sizes accepted by the Forward Error Correction; selecting, a set of modulation and coding schemes to be independently applied to each of the codeblocks; including, information about the selected set of modulation and coding schemes within part of physical resources devoted to user data by reserving specific subcarriers and OFDM symbols; and mapping, said information within physical resources devoted to user data and not reserved for said selected set of modulation and coding schemes, first in order of ascending OFDM symbols and then of ascending subcarriers.

The present technology relates to a signal processing apparatus and method which can suppress increase in power consumption.

In an aspect of the present technology, control data, which is for controlling frequency modulation to a carrier signal using digital data to be transmitted, and for suppressing a time average of a fluctuation amount of a frequency modulation amount more than a case of controlling the frequency modulation to the carrier signal using the digital data is generated, the frequency modulation is performed to the carrier signal on the basis of the generated control data, and the carrier signal to which the frequency modulation is performed is transmitted as a transmission signal. The present technology can be applied to, for example, a signal processing apparatus, a transmission apparatus, a reception apparatus, a communication apparatus, or an electronic apparatus having a transmission function, a reception function, or a communication function, or a computer which controls these.