194results about How to "Guaranteed Orthogonality" patented technology

The invention provides a downlink control information configuration method which comprises the following steps: a base station configures a plurality of sets of information for a terminal through a special high-level signaling for the terminal; and the base station instructs the terminal to adopt one set of the information configured by the special high-level signaling for the terminal to receive a DMRS and/or a physical downlink shared channel PDSCH according to related information of DCI Format 1A. The invention further provides a downlink control information acquisition method which comprises the following steps: the terminal acquires the plurality of sets of information configured by the base station through the special high-level signaling for the terminal; and the terminal determines which set of the information among the plurality of sets of information is adopted to receive a DMRS and/or a physical downlink shared channel PDSCH according to the related information of DCI Format 1A. The invention further provides a base station and a terminal.

The present invention relates to a method and apparatus for generating a reference signal sequence in a wireless communication system. User equipment receives a cell-specific sequence hopping parameter from a base station, receives, from the base station, a user equipment (UE)-specific sequence group hopping (SGH) parameter which is specific to said user equipment, and generates a reference signal sequence on the basis of a base sequence number of a base sequence, wherein the base sequence number is determined for each slot on the basis of the cell-specific sequence hopping parameter and of the use equipment-specific sequence group hopping parameter. Here, the determination of whether or not to apply sequence hopping to the base sequence number indicated by the user equipment-specific sequence group hopping parameter overrides that of whether or not to apply sequence hopping to the base sequence number indicated by the cell-specific sequence hopping parameter.

The invention discloses a method for allocating uplink reference signals, which comprises the following steps that: a base station judges whether asymmetric user equipment (UE) exists in an uplink member carrier of a multi-carrier polymerization system, wherein the asymmetric user equipment (UE) refers to the user equipments (UE) which use the same uplink member carrier and different downlink member carrier; if the base station judges that the asymmetric user equipment (UE) exists in the uplink member carrier, the base station indicates the serial number of the uplink reference signal root sequence to the asymmetric user equipment (UE) according to a signaling, and the asymmetric user equipment (UE) allocates an uplink reference signal according to the signaling. The method definitely indicates the reference signal sequence in the uplink member carrier by the signaling, can avoid the interference between the UE because the downlink member carrier uses different Cell ID, and can ensure the orthogonality of the uplink reference signal sequences.

The invention discloses a method, device and system for transmitting demodulation reference signals (DMRSs), for solving the problem that the orthogonality of each UE pilot frequency cannot be ensued when multiple UE is simultaneously accessed in the prior art. The method provided by the embodiments of the invention comprises: according to a correspondence table of an antenna port and a transmission layer number, respectively selecting a correspondence provided with the same transmission layer number as each UE for at least two UE which performs MU-MIMO communication at the same resource, and respectively distributing the antenna ports in each selected correspondence to the corresponding UE, the different antenna ports being distributed to the different UE; and notifying the corresponding UE of the index numbers of the selected correspondence, and sending the DMRSs through the antenna ports in the selected correspondence. According to the embodiments of the invention, the orthogonality of the DMRSs of multiple simultaneously accessed UE can be ensured, the system capacity is enhanced, simultaneous access of UE with multiple different transmission layer numbers can be supported, and the system flexibility is improved.

The present invention provides a method and apparatus for generating a reference signal sequence by user equipment (UE) in a wireless communication system. The UE receives a UE-specific sequence group hopping (SGH) parameter that is specific to itself, and generates a reference signal sequence based on a base sequence in each slot unit. The base sequence is classified into sequence-group numbers determined in each of the slot units by the UE-specific SGH parameter indicating whether SGH has been carried out, and base sequence numbers.

Provided are a method and an apparatus for transmitting an uplink (UL) reference signal (RS) in a wireless communication system. A first user equipment (UE) served through a macro eNodeB (eNB) generates a first UL RS on the basis of a first indicator and transmits the generated first UL RS. A second UE served through a pico eNB having the same cell identifier (ID) as the macro eNB generates a second UL RS on the basis of a second indicator and transmits the generated second UL RS. The bandwidth to which the first UL RS is transmitted is overlapped with the bandwidth to which the second UL RS is transmitted.

The invention provides a method and device for correcting wireless local area network (WLAN) chip radio-frequency transmitter LO leakage. The device is formed by an analog compensation circuit and digital LO leakage estimation and correction. In order to eliminate the LO leakage introduced by a radio-frequency circuit at a transmitter and enable emitting signals to be accord with the frequency spectrum requirement of a WLAN protocol, the device is added with the compensation circuit at the radio frequency portion; then the deviation values of I/Q two paths of signals are estimated through a digital one-dimensional scanning method; and the estimation results are written into the compensation circuit of the radio frequency portion, thereby realizing the correction of the LO leakage of the transmitter.

The invention belongs to the radar technology field and the signal processing field, and relates to application of a multiple input multiple output (MIMO) type system, in particular to an MIMO radar sparse imaging algorithm based on a hybrid matching pursuit algorithm. The MIMO radar sparse imaging algorithm comprises the steps that firstly, M emitting array elements emit orthometric phase-coded signals, and N receiving array elements receive the phase-coded signals; secondly, a matched filter of a receiver of each receiving array element conducts matched filtering on the received phase-coded signals; thirdly, fourier transform is conducted on the matched-filtered signals, and a spatial spectral domain echo expression is obtained. Index selection of each time in the HMP algorithm is realized through an OMP algorithm, orthogonality of base signal selection is guaranteed through the operation, and spatial surface elements which are very close to one another can be distinguished when fourier similar characteristics exist in a dictionary matrix; meanwhile, backtracking selection operation in the HMP algorithm is the same as that in an SP algorithm.

The invention discloses an uplink control information feedback and receiving method, a base station and a relay station, which can maintain the orthogonality of a PUCCH (Physical Uplink Control Channel) of the relay station and a PUCCH of UE (user equipment) while realizing the flexible PUCCH resource distribution of the relay station. The uplink control information feedback method comprises the following steps of: receiving PUCCH format 2/2a/2b channel resources distributed by the base station; and feeding back uplink control information on the PUCCH format 2/2a/2b channel resources, wherein the uplink control information comprises answering information and/or SRI information. The method for receiving the uplink control information comprises the following steps of: assigning the PUCCH format 2/2a/2b channel resources to the relay station, and receiving the uplink control information fed back by the relay station on the PUCCH format 2/2a/2b channel resources, wherein the uplink control information comprises answering information and/or SRI information. The embodiment of the invention can maintain the orthogonality of the PUCCH of the relay station and the PUCCH of the UE while realizing the flexible PUCCH resource distribution of the relay station.

The invention belongs to the radar technology field and signal processing field and more particularly, to a tensor-sparse-representation-based MIMO radar's imaging method for a multi-input and multi-output type system. The method comprises: transmitting by M emission array elements mutually orthogonal phase coded signals; receiving by N receiving array elements the phase coded signals; using a matched filter to perform matched filtering to the received radar signals; conducting the Fourier transform to the signals after matched filtering to obtain the spatial spectral echo expression; performing mesh generation to the scene; and discretizing the radar echoes to obtain the mathematical expression for radar imaging and focusing under the compression sensing framework. The method of the invention overcomes the shortcoming of a DAS method which has intrinsically low resolutions and high side lobes. Compared with other classic imaging method featuring compression sensing, the THMP method of the invention fully utilizes the tensor characteristics of received signals to conduct sparse signal recovery, which avoids the information loss of the internal structure of the signals brought about by the vectorized operations.

The invention discloses a polarization multiplexing band interpolation based OFDMA-PON (orthogonal frequency division multiple access-passive optical network) system which is characterized in that: two paths of OFDM (orthogonal frequency division multiplexing) signals are respectively produced at an optical line terminal, and sub-bands of the two paths of OFDM signals are mutually interleaved; and through respectively carrying out optical modulation and polarization control on the OFDM signals, two paths of optical OFDM signals in the x and y polarization directions are respectively obtained, and then combined into one path so as to form optical OFDM signals without protection bands, in such a way, the bandwidth of the system is fully used. An optical distribution network divides the received optical OFDM signals into optical OFDM signals in the x and y polarization directions, then an optical beam splitter divides the OFDM signals into multiple paths, and an optical filter extracts the optical OFDM signals divided by the optical beam splitter, selects required different sub-band optical OFDM signals or different numbers of sub-band optical OFDM signals, and sends the selected signals to respective optical network units, thereby achieving the variable-speed access of the optical network units.

The invention provides a time lead indication method and device, a base station and a terminal. The method comprises the steps of sending sub-carrier interval configuration information of a physical uplink sharing channel (PUSCH) and/or a physical uplink control channel (PUCCH) to the terminal; receiving a lead code fed back by the terminal according to the sub-carrier interval configuration information; according to the lead code, acquiring a quantized value of the time lead corresponding to a tracking area; and sending the quantized value of the time lead to the terminal. According to the method, device, base station and terminal provided by the embodiment of the invention, under the condition of ensuring that the signaling overhead is invariable, the indication of the uplink time lead is effectively achieved, and the condition that the random access mechanism of 5G NR can adjust the quantized interval of the time lead according to the uplink carrier interval is ensured, and the uplink orthogonality is achieved.

A modularized atomic energy microscope is disclosed, comprising seven modules. The first one is stepper motor the second is sample support with four-dimensional adjustment fixed on stepper motor, the third is z direction scanner, the fourth consists of microbracket needle point and focusing lens, the fifth is xy direction scanner, the sixth consists of semiconductor laser with focusing lens, reflector, imaging lens and four-quadrant photoelectric sensor, the seventh consists of optical microscope, CCD camera, monitor. The invention has convenient adjustment and replacement to modularized atomic energy microscope, and using each module to construct atomic energy microscope with different structure is easy and sample has function of coarse positioning.

The invention relates to a hypersonic velocity pointed conical appearance heat flux density modeling approach based on functional optimization. The approach comprises the steps of utilizing a hypersonic velocity calorimetric wind tunnel to conduct a ground calorimetric test on n pointed conical models with different shrink ratios of an aircraft; obtaining heat flux density distribution laws of n models with different shrink ratios in the hypersonic velocity calorimetric wind tunnel to obtain heat flux density test values Qwi respectively, wherein 1<=i<=n; adjusting wind tunnel test parameters in the hypersonic velocity calorimetric wind tunnel, and obtaining a first set of heat flux density test values Qwij, wherein j is wind tunnel test times; obtaining heat flux density distribution laws of a first set of aircrafts; totally obtaining heat flux density distribution laws Qwk of k sets of aircrafts; applying a functional optimization algorithm, introducing a wind tunnel quality variable a and a calibration model parameter b, conducting iterative operation on Qwk, solving an optimal spatial alternation, and obtaining pointed conical heat flux density model Qw. The hypersonic velocity pointed conical appearance heat flux density modeling approach based on the functional optimization avoids one-sidedness of a modeling method in the prior art and interference of human experience factors.

The invention relates to a method of abutting joint of two total segments in the shipbuilding process, which utilizes a laser theodolite to measure the same surface degree of an abutting joint seam. The laser theodolite must be arranged to be orthogonal with the center line of a hull. Under the condition of a ruling line detected to be beyond a size, the remain is cut to ensure the surface degree tolerance of a finished abutting joint surface to be at most 2 mm. The method increases the construction abutting joint accuracy and speed of the two total segments and reduces hull trimming workload and the occurring of two positioning accidents. The laser theodolite is used to measure, score and finish an end surface, and firstly the same surface degree of the abutting joint surface and the orthogonality of the abutting joint surface and a center surface must be ensured. A baseline on a bottom folding target rod is utilized to measure the deflection degree of the bottom baseline, therefore the slope of the baseline is determined, and finally the method ensures the angle between the abutting joint plane and a baseline surface to be a right angle.

The invention provides a joint compensation method of mode dependent loss and polarization dependent loss. The method comprises the following steps: S1, performing constellation modulation on a bit signal; S2, performing mode polarization time encoding on the signal after the constellation modulation; S3, performing light modulation on the signal after the mode polarization time encoding; S4, performing light polarization beam combination on the signal after the light modulation; S5, performing mode coupling on the signal after the light polarization beam combination; S6, decoupling the signal in mode coupling; S7, performing light polarization beam splitting on the decoupled signal; S8, performing coherent demodulation on the signal after the light polarization beam splitting; S9, performing channel equalization on the signal after the coherent demodulation; S10, performing mode polarization time decoding on the signal after the channel equalization; and S11, performing constellation demodulation on the decoded signal. Through the adoption of the method provided by the invention, the mode dependent loss and the polarization dependent loss in the transmission process can be effectively inhibited, and the system performance is improved.

The invention discloses a key generation method applied to a multi-user large-scale MIMO (Multiple Input Multiple Output) system, which comprises the following steps: generating a key in a beam domain: firstly, respectively carrying out link detection on a base station and each user, and designing a precoding matrix and a receiving matrix according to a detection result; then the base station andeach user respectively using the precoding matrix and the receiving matrix to send pilot signals to each other, and respectively preprocessing the received signals and forming an initial secret key through channel estimation; and finally, obtaining a consistent random key between the base station and each user through information reconciliation and privacy amplification. According to the technicalscheme of the invention, when an existing single-user point-to-point secret key generation mode is applied to a multi-user large-scale MIMO communication system, the multi-user point-to-point secretkey can be generated. The problems of overlong pilot signal length and high pilot overhead caused by the increase of the number of antennas and the number of users are solved, meanwhile, the designedprecoding and receiving matrixes can realize the key rate maximization, and the safety of a communication system is ensured by a non-overlapping beam set.