Southeast University

Purple Mountain Laboratories

Zte Wavetone Science and Technology Ltd.

Zte Wavestone Science and Technology Ltd.

Yongming Huang

Jun Zhang

Haiming Wang

Shiwen He

Yu Wang

Zihuan Mao

Shengheng Liu

Xiaohu You

Bo Wu

Wei Hong

Bin Sheng

Lyuxi Yang

Lin Tian

Wangdong Qi

Jianjun Zhang

Tianheng Ni

Ruisong Cao

Provided are a method and apparatus () for determining an angle and a distance of a target (), a radar (), and a storage medium. The method includes: a frequency diversity signal is transmitted to a target (), and a received signal reflected by the target () is received; an equivalent received signal vector is determined; hole filling processing is performed based on the equivalent received signal vector, so as to determine a uniform received signal vector; an equivalent received signal equation is performed based on the uniform received signal vector, and an objective function and a constraint condition is established for solving an objective optimization problem of the equivalent received signal equation (S); and the objective optimization problem is solved to obtain an objective solution matrix, and the angle and the distance of the target is determined based on the objective solution matrix (S).

Method and apparatus for determining angle and distance of target, radar and storage medium

Provided is an improved beam control method of an array antenna based on frequency diversity. The method includes: signals from a transmitter are received by a receiving array which includes a first sub-array and a second sub-array, wherein the first sub-array includes M uniformly arranged array elements, the second sub-array includes N uniformly arranged array elements, M and N are coprime integers, and N≥0; a signal received by each array element in the receiving array is input into a constructed model, and a covariance matrix is output after processing the signal via the model; a virtual array is constructed at a receiver, wherein a virtual array element in the virtual array is a second-order statistic calculated according to the covariance matrix; and a frequency is randomly selected for each virtual array element from a frequency set of the virtual array, so as to form a beam pattern.

Beam control method and system of array antenna based on frequency diversity, and beam controller

In a method for coding on a time-space two-dimensional channels, the system expresses the coding method with code words, merges the code words to form a space-time two-dimensional codebook, stores the codebook at both ends of the sending terminal and the receiving terminal; the sending terminal selects the coding structure according to the code words, and encodes each data stream according to time-domain coding rates, and forms data blocks of an equal length in the time-domain through the rate matching. The system selects different code word serial numbers, rate matching tables and space time slicing modes according to the requirements of different scenarios for transmission rates, latency and code error rate, as well as channel states and size of data blocks; when a Time Space Concatenated Coding Mode is adopted, the sending terminal performs time-domain coding according to the time-domain slicing mode and the time-domain code words.

Method for coding on time space two dimensional channel

The invention discloses a method and an apparatus for forming a power-efficient digital-analog hybrid beam in a multi-antenna system, and a device. The method includes the following steps. Perform mathematical modeling on a beam forming design firstly to construct a beam forming optimization problem that minimizes ripples in a main lobe and a side lobe. Convert an original optimization problem into an a constraint-separable optimization problem using a penalty function method. Perform iterative solution finally using a block coordinate descent method. The beam designed by the invention has a small peak-to-average ratio, a power amplification efficiency of a power amplifier is very high, and a limited resolution characteristic of the phase shifter is considered. The ripples in the main lobe and the side lobe of the beam designed are very small and a transition band is very narrow.

Method and apparatus for forming power-efficient digital-analog hybrid beam in multi antenna system, and device

A hybrid data transmission frame format for a hybrid single-carrier modulation and OFDM carrier modulation MIMO system and corresponding transmission/reception methods and devices. A transmitter employs single-carrier modulation for preambles and signaling fields via a single-carrier signal generator to produce single-carrier transmission sequences of transmission links. While to employs the same sampling rate to process all the data so as to match a receiver, the sampling rate of the single-carrier transmission sequences needs to be processed into being identical to that of OFDM via a pulse shaping multiphase filter before entering a digital-to-analog converter; the transmitter employs an OFDM modulation mode to transmit data field segments via an OFDM signal generator; and a data receiving process of the receiver is opposite to a data transmitting process of the transmitter.

Methods and devices for transmission/reception of data for hybrid carrier modulation MIMO system

A parametric generating method for a zero correlation zone sequence set, includes: determining a ZCZ sequence set to be generated; determining a limited symbol set; determining an initial non-periodic orthogonal complementary sequence set; constructing a discrete Fourier transformation matrix by using elements in the limited symbol set; constructing a coefficient matrix based on the number of sequences and the number of iterations in the sequence set; using the columns of the coefficient matrix respectively as the coefficients of each sequence in the ZCZ sequence set, iteratively generating ZCZ sequence sets by using a method of zero filling the tails of weighting coefficients; and traversing the coefficient matrix, and selecting a ZCZ sequence set meeting the criteria or an optimal ZCZ sequence set according to requirements.

Parametric generating method for ZCZ sequence set

The present invention discloses a pilot frequency position determining method based on pilot frequency interval optimization and a transceiver device. The method optimizes a pilot frequency position on the basis of better use of pilot frequency in a wireless system for sampling frequency synchronization and residual phase tracking. After an optimal pilot frequency position is obtained according to the method, a transmitting terminal inserts a pilot frequency sequence at a corresponding pilot frequency position, a receiving terminal learns the pilot frequency position and the pilot frequency sequence, and after channel equalization, deviation is tracked by means of coherent detection of a local sequence. For the aforementioned method, the present invention further provides a transceiver device of a related pilot frequency module in the wireless system. The pilot frequency position can be better determined without increasing system complexity, and the present invention significantly improves the system performance.

Pilot frequency position determining method based on pilot frequency interval optimization, and transceiver device

Growing community of inventors

Jiangsu, China

Yongming Huang