35 results about "Universal filtered" patented technology

The invention relates to a method for lowering the peak-to-average power ratio of universal filtering multicarrier signals. The method comprises the following steps of: (1) establishing a system model; (2) setting that the sampling points are mutually independent and identical in distribution, and utilizing numerical calculation to analyze the system model; (3) theoretically analyzing a high peak-to-average power ratio (PAPR) of universal filtering multicarriers (UFMC), and obtaining a complementary cumulative distribution function (CCDF); (4) analyzing system parameters of the universal filtering multicarriers (UFMC); (5) utilizing a Largrange method to obtain an optimal solution of the complementary cumulative distribution function; and (6) establishing the relation between filter parameters and the complementary cumulative distribution function (CCDF). According to the invention, the relation between the UFMC peak-to-average power ratio statistic characteristics and the filter coefficients is analyzed, a Largrange optimization method is utilized to obtain the CCDF optimal solution of the UFMC and the expressions of theoretical relations of the filter parameters, the design of a filtering multicarrier system is guided, and the peak-to-average power ratio is further lowered.

The invention relates to a compressed sensing and high-speed mobility-based universal filtered multicarrier (UFMC) system wireless channel estimation method, belonging to the field of wireless communication. The method comprises the steps of building a system model, analyzing a UFMC system parameter of an inserted PN sequence, and determining sending and receiving signal models in a multi-path channel; analyzing a temporal correlation and a sparse characteristic of the multi-path channel; performing self-related channel coarse estimation based on the PN sequence; estimating a channel delay position accurately based on a compressed sensing algorithm; performing channel amplitude accurate estimation of an LS algorithm; and analyzing performance and a simulation result. According to the method, the impact of noise of CIR of R<g> consecutive symbols in an average correlation time in the channel coarse estimation process on the signal is lowered by fully utilizing channel temporal correlation, so that the coarse estimation accuracy of the channel time domain impulse response is further improved; and the channel time delay and sparsity accuracy estimated by an improved SAMP algorithm are further improved by fully utilizing information obtained through coarse estimation, and the traditional SAMP algorithm is less complex.

The invention discloses a power windowing sending method applicable to UFMC (universal filtered multicarrier) waveforms. The method includes: firstly, a sending end sets sub-bands requiring filtering in a frequency domain according to system requirements, wherein the sub-bands are formed by adjacent sub-carriers; secondly, each sub-band is subjected to N-point Fourier inverse transformation to a time domain; thirdly, the sending end multiplies power of a time domain signal of each sub-band by a window function being N in length; finally, generated signals are processed by a filter to form UFMC baseband signals which are modulated to a carrier frequency prior to being sent.

The invention discloses an interception agent for reducing the phenol content in cigarette smoke, which is prepared by blending water, glycerol and essence in a volume ratio of 2.5:(1.2-5):(0.1-0.125), stirring and evenly mixing the mixture. The invention further discloses a filter stick provided with the interception agent, which is prepared by the following steps: (1), adopting a preparation technology for an officinal capsule, taking the interception agent as the capsule core material and wrapping the agent inside the capsule; and (2), applying one or more capsules in fixed positions in a shred forming process, applying a universal filter stick forming technology , and obtaining the filter stick formed once and provided with a total addition quantity of the interception agent ranging from 0.01 mg to 0.5 mg. The interception agent and the filter stick can reduce the phenol content in the cigarette smoke remarkably, improve the cigarette smoke moisture simultaneously, enhance the moist feeling of the smoke, improve the quantity and the quality of the smoke, and endow the smoke with special aroma and smoking flavor, and have the advantages of simple formula, wide raw material source and low cost.

The invention provides a multi-band parallel filtering type hybrid carrier transmission method and belongs to the field of multi-carrier transmission. The method solves the problems in the prior art that due to the fact that when an inverse filter is performed at the receiving end of an existing universal filtering multi-carrier system, the noise on each sub-carrier at the edge of a sub-band is amplified, so that the error rate is increased and the peak-to-average power ratio of the existing universal filtering multi-carrier system is too high. To-be-transmitted baseband data are divided into K sub-bands by a transmitting end, and the data of sub-bands of at least one access are pre-coded and then converted to a time domain. A receiving end converts the baseband data after down-conversion from the time domain to the frequency domain, and then the data of each sub-band of the transmitting end are recovered. After that, the data of each sub-band of the transmitting end also need to be subjected to inverse pre-coding. The pre-coding is used for transmitting the data of sub-bands in a single-carrier mode, and is also used for converting the data of sub-bands from the time domain to the frequency domain. The inverse pre-coding is used for converting the symbol decision position of the data of each sub-band from the frequency domain to the time domain. The method is mainly used for multi-band parallel filtering type transmission.

The invention provides a video image deblocking filter method and a video image deblocking filter device. According to the method, a video or image frame is divided into a plurality of 16*16 macro blocks, and each macro block is divided into 16 4*4 subblocks. The method comprises the following steps of: reading the pixel data of the current macro blocks from a first storage device and a second storage device to a specified buffer group according to the instruction information described by a control vector when the pixel data of the current macro blocks is read; and executing operations of determining the number of corresponding subblocks, calculating the filter strength, determining the filter type, performing filtering operation processing and performing data write-back processing according to the instruction information described by the control vector in the process of executing filtering processing of each current subblock. The essence is that the universal filtering processing operation on different coding and decoding standards is executed according to the instruction information described by the universal control vector in a control table. According to the video image deblocking filter method and the video image deblocking filter device, standard deblocking filter processing can be performed on different videos, the universality is high, and the filtering speed is increased.

Filters that remove particulate and other solids from fluids often come in various sizes and include various types of seals. However, filter bases to which the filters are attached are generally manufactured to accommodate only one specific size of filter including one type of seal. A filter base of the present invention includes a filter attachment portion and a sealing portion. In order to expand the different sizes of filters that the filter base can accommodate, the sealing portion includes a first annular sealing surface with a relatively small diameter and a second annular sealing surface with a relatively large diameter. The two sealing surfaces can be any combination of radial and a face sealing surfaces. The filter base is used for filtering fluids, such as fuel, in an internal combustion engine.

The invention concerns a method for conditioning a multicarrier transmit signal using a first or a second set of subgroups of time-frequency resource elements, with a subgroup of the first set of subgroups and a subgroup of the second set of subgroups having common time or frequency resources and being neighboured in time or frequency, wherein a first filter module (FILT1) filters the first set of subgroups using a first filter characteristic by a first set of filter coefficients, and a second filter module (FILT2) filters the second set of subgroups using a second filter characteristic by a second set of filter coefficients, and a base station and a transmitter apparatus (TA) therefor.

An embodiment of the invention discloses a signal processing method, receiving terminal equipment and transmitting terminal equipment to improve flexibility of a narrow-band interference inhibition method. The method includes: a receiving terminal acquires first signals, wherein the first signals are signals transmitted in sub-bands within a receiving range of the receiving terminal and are signals in a UFMC (universal filtered multicarrier) waveform, and the sub-bands no less than two are obtained by splitting of preset wideband channels; the receiving terminal filters the first signals to obtain second signals; the receiving terminal subjects the second signals to AGC (automatic gain control) adjustment to obtain third signals; the receiving terminal judges whether the third signals meet preset conditions or not; if yes, the receiving terminal confirms that the third signals are free of interference; if not, the receiving terminal sends instructions to a transmitting terminal, wherein the transmitting terminal is a device which sends the first signals, and the instructions are used for indicating that the receiving terminal fails to complete filtering of interferences caused to the first signals. Consequently, flexibility of the narrow-band interference inhibition method can be improved.

The invention provides a selective mapping-based universal filtering multi-carrier method, which comprises the following steps: dividing a sub carrier into B sub bands, extending each sub band into Udifferent candidate sub bands, multiplying each of the candidate sub bands with a group of randomly generated twiddle factors, filtering the sub carrier of each sub band with an FIR filter, selectingone sub band with the minimum peak-to-average power ratio (PAPR) from the sub bands of a sending end for transmission, superposing transmission signals, in a time domain, in the B sub bands selected from the sub bands to form a new sending signal, performing fast Fourier transform on received signals, removing an interference signal, directly recovering the sending signal from the received signalsthrough a linear equalization method, and performing twiddle factor reversing operation on an equalized signal to reconstruct an original sending signal. The PAPR performance of the selective mapping-based universal filtering multi-carrier method is effectively improved, and the selective mapping-based universal filtering multi-carrier method has a certain engineering application value.

A complimentary single-ended-input OTA-C universal filter structures in terms of integrated circuits is provided. The integrated circuit comprises a plurality of amplifiers and a plurality of capacitors. In some capacitors, one electrode is electrically connected to the positive input of its corresponding amplifier, and the other electrode can be electrically connected to an electrical source. In addition, the negative input of one amplifier is electrically connected to the negative input of another amplifier. Besides, there are a head amplifier and a tail amplifier. The output of the head amplifier is electrically connected to the negative input of the head amplifier, and the positive input of the tail amplifier can be electrically connected to an electrical source.

The present invention provides a thick and fine smoke filter cigarette holder, which includes a cigarette holder body, the cigarette holder body includes a smoke return pipe, a filter pipe, a filter, a top cover, and the smoke return pipe, filter pipe, filter and The top cover is sequentially connected with the inside to form a connected cavity. The flue gas return pipe is provided with a ventilation sheet, the ventilation sheet is provided with an air inlet, the filter tube is provided with a hole for placing a thick cigarette holder, and the filter is provided with a hole for placing a thin cigarette holder. The setting of the hole for placing the thick and thin cigarette holder meets the needs of cigarettes of different thicknesses and improves the use value. At the same time, the setting of the air inlet hole allows the air to enter the cigarette holder and mix with the smoke, thereby converting part of the carbon monoxide in the smoke into carbon dioxide and reducing the user's fatigue. Inhalation of carbon monoxide.

The invention particularly relates to a universal filtering shower head with an inductive switch. The universal filtering shower head with the inductive switch comprises a handle part, a connecting part, a shower head part and a control switch; the two ends of the connecting part are correspondingly connected with the handle part and the shower head part; the connecting part is a double-layer universal joint; the shower head part comprises a filtering element; and the control switch comprises a main discharge valve and the inductive switch. According to the universal filtering shower head withthe inductive switch, with the adoption of the filtering element, the filtering effect is good; with the adoption of a universal connector, the water spraying directions can be adjusted convenientlyand freely; and with the adoption of the inductive switch, water can be discharged automatically through induction, and the universal filtering shower head is more water-saving and energy-saving.

The invention discloses an oil-water separation device, comprising a surfactant adding device, a combined filter and a probe, wherein a surfactant is water-based ethanol, and the combined filter consists of multiple universal filters arranged side by side. Each universal filter is an EUTEC filter. The surfactant is AR-grade water-based ethanol. The oil-water separation device also comprises a nano adsorbent. The oil-water separation device is simple to operate, high in oil-water separation efficiency, small in generation amount of waste residues, and small in agent used amount, and can effectively remove oil in oily sewage.

The invention discloses a general purpose filter multicarrier system based on non-orthogonal multiple access, comprising a transmitter and a receiver. At atransmit end, each user simultaneously occupiestwo sub-bands for information transmission, namely, signals of two users are simultaneously transmit on the same sub-band; at areceiving end, the received signals of all users in frequency domain are equalized simultaneously by the parallel interference cancellation technology to recover the original data information sent by all users. Compared with the prior universal filter multicarrier system, the invention can fully realize the frequency diversity gain of the channel bandwidth, and has the advantages of excellent performance, low time delay and the like.

The invention particularly relates to a universal filtering shower head. The universal filtering shower head comprises a handle part, a connecting part and a shower head part; the two ends of the connecting part are correspondingly connected with the handle part and the shower head part; the handle part comprises an outer pipe, an inner pipe and a first filtering element; the connecting part is adouble-layer universal joint which comprises a universal pipe and a rubber pipe; the universal pipe is located on the outer layer; the rubber pipe is located on the inner layer; and the shower head part comprises a first water diversion cover, a connector and a second filtering element. The universal filtering shower head is provided with the two filtering elements, so that the filtering effect isgood; and the universal filtering shower head is provided with a universal connector, so that the water spraying directions can be adjusted conveniently and freely.

The invention discloses a universal filter, comprising a data delay register unit, a time division multiplexing logic operation accumulation unit and a saturation operation unit, wherein the data delay register unit comprises two input ends and four output ends; the time division multiplexing logic operation accumulation unit comprises five data input ends and five filter parameter input ends; thetime division multiplexing logic operation accumulation unit is configured to output a second difference value at the last four beats of the predetermined beats of a clock signal, and the second difference value is obtained by subtracting the fourth and fifth products from the sum value of the first, second and third products, wherein the first product is a product of a digital input signal and afirst filter parameter; the second/third product is a product of a first/second delay digital input signal and a second/third filter parameter; and the fourth/fifth product is a product of a first/second delay digital output signal and a fourth/fifth filter parameter; and the saturation operation unit is configured to obtain a digital output signal according to the second difference value. By implementing the scheme of the invention, chip resources can be effectively saved, and data input signals can be effectively processed.