35 results about "Universal filtered" patented technology

The invention provides a filter for a universal wall-hung boiler, which belongs to the technical field of filters. It solves the problem of poor safety of the existing universal filter. The filter includes a housing and a tee joint. The housing is provided with a filter element assembly. The housing has a water end facing the filter element assembly. The inner pipe extending in the water end, the tee joint and the water end are circumferentially sealed, the inner pipe extends into the water end and an axially fixed clamping structure is arranged between the inner pipe and the inner wall of the housing. This design hides the fixed position between the tee joint and the shell in the water outlet so that the outside world cannot be contacted, so there is no possibility of artificial accidental opening, which improves the safety of the filter.

The invention discloses a synchronous symbol design method applicable to a UFMC (Universal Filtered Multi-Carrier) waveform. The method comprises the following steps: S1, generating a time domain sequence A having the length (N-L) / 2, and then adding L zeros behind to form a B sequence having the length (N+L) / 2; S2, duplicating the B sequence, then putting the duplicated sequence behind the B sequence to form front and back halves of equal synchronous symbols, and sending the synchronous symbols via a filter; S3, a receiving end converting received signals down to a baseband, and storing the signals; S4, taking the i sampling point of the received signals as a starting point, sampling (N+L) / 2 sampling points behind, and saving the sampling points as a row vector V1; S5, taking the (i+(N+L) / 2) sampling point of the received signals as a starting point, sampling (N+L) / 2 sampling points behind, and saving the sampling points as a row vector V2; S6, calculating the result of V1V2<H>, and obtaining module values rhoi; and S7, comparing the value of each rhoi in an observation window, and selecting the sampling position corresponding to the maximum as the starting position of the UFMC symbols. The synchronous symbol design method can be applied to a UFMC waveform technology which may be adopted in next generation communication system, and does not need to change the existing communication system and standard.

The invention discloses a multi-channel pipeline FIR filter, including a channel merging device, a zero-order filtering unit, a plurality of universal filtering units connected in series and a channel splitting device. M paths of input data pass through the channel merging device and are merged into one path to be output; a path of output signal of the zero-order filtering unit enters a buffering shifter, after buffering shifting, enters a second multiplier, multiplication operation is carried out on the output signal and an output signal of a second coefficient storage unit, a result is output to a multiplication output register block, a delayed signal and the other path of output signal of the zero-order filtering unit are added through an adder, and are then output to an addition output register block; and the channel splitting device is used for extracting parallel M paths of data from serial filtering signals to be output. The multi-channel pipeline FIR filter provided by the invention has high operation efficiency, supports input data interruption transmission, has a simple cascade mode, the order is easy to expand, and the universality is high.

The present invention provides a digital-energy-integrated waveform design based on packet filtering, which includes the following steps: establishing a general-purpose filtering multi-carrier system model: (1) grouping subcarriers and performing IDFT transformation to obtain an IDFT sequence; (2) converting the IDFT sequence to The discrete sequence is obtained through FIR filter processing; (3) D / A conversion is performed on the discrete sequence to obtain the baseband signal; (4) The baseband signal is moved to the set frequency to determine the system model to be detected; (5) According to the energy Use the strategy to analyze the preferred signal, that is, the analysis of the modulated signal based on UMFC; the analysis of the non-modulated signal based on UMFC; the analysis of the mixed modulated signal based on UMFC; the analysis of OFDM signal based on UMFC; optimization solution.

The invention relates to field of water purifying equipment, in particular to a water purifying cup with a universal type filtering device. The water purifying cup with the universal type filtering device comprises a cup body and the filtering device, wherein the filtering device comprises a shell body, a cover body is arranged at the upper portion of the shell body, a water drinking port is formed in the cover body, a flange is arranged on the outer wall of the top of the shell body, the external diameter of the flange is smaller than the internal diameter of the cover body, the cover body is provided with an inner thread, an outer thread is arranged on a cup mouth of the cup body, and the cover body achieves threaded connection through the inner thread and the outer thread at the cup mouth. The water purifying cup is simple in structure and good in water purifying efficiency. By means of the water purifying cup, a user can drink purified water at any time and any place. Besides, the filtering device is strong in universality, is convenient to replace and is combined with other cup bodies for use.

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.