79 results about "Selection diversity" patented technology

Certain embodiments of the invention may be found in a method and system for antenna and radio front-end topologies for a system-on-a-chip (SOC) device that combines Bluetooth and IEEE 802.11 b / g WLAN technologies. A single chip radio device that supports WLAN and Bluetooth technologies receives a WLAN signal in a WLAN processing circuitry of the radio front-end and in a Bluetooth processing circuitry of the radio front-end. Signals generated by the WLAN processing circuitry and the Bluetooth processing circuitry from the received WLAN signal may be combined in a diversity combiner that utilizes selection diversity gain combining or maximal ratio combining (MRC). When a generated signal is below a threshold value, the signal may be dropped from the combining operation. A single antenna usage model may be utilized with the single chip radio device front-end topology to support WLAN and Bluetooth communications.

Disclosed are systems and methods which provide high bandwidth data communication with respect to a large coverage area using smart antenna and / or directional antenna (referred to herein as multi-beam antenna) technology. Circuitry may be provided at a WLAN AP to provide selection of particular antenna beams used in the downlink and / or uplink, control of multicast transmission, control of unicast transmission, and to provide antenna pattern shaping techniques. Embodiments implement multi-beam antenna technology with little or no hardware modifications to AP circuitry. Other embodiments implement multi-beam technology using radio front-end and / or radio hardware modifications to AP circuitry. Various diversity techniques may be implemented, such as selection diversity, maximum ratio combining, and equal gain combing. To provide desired antenna pattern shaping, phase offsets with respect to a signal as transmitted in each antenna beam may be employed.

Techniques are provided to support successive interference cancellation (SIC) receiver processing with selection diversity whereby each of NT transmit antennas may be turned on or off. One symbol stream may be transmitted from each transmit antenna. A SIC receiver recovers the transmitted symbol streams in a specific order. Up to NT! orderings are evaluated. For each ordering, NT post-detection SNRs are obtained for NT transmit antennas and used to determine NT data rates, where the data rate is zero if the post-detection SNR is worse than a minimum required SNR. An overall data rate is computed for each ordering based on the NT data rates. The ordering with the highest overall data rate is selected for use. Up to NT symbol streams are processed at the data rates for the selected ordering and transmitted. The transmitted symbol streams are recovered in accordance with the selected ordering.

Certain embodiments of the invention may be found in a method and system for antenna selection diversity with prediction. An antenna diversity system may use information that it has stored on the antenna selection process in previous frames to predict the starting receiving antenna and the starting transmission antenna for the next frame. The prediction may be based on which antennas were selected in previous frames or may be based metrics associated with performance of the antennas. Prediction may be based on a majority polling scheme of previously selected antennas in a determined number of previous frames. Prediction may also be based on a weighted sum of at least one selection metric for all antennas in a determined number of previous frames. Antenna prediction provides a significant performance improvement by reducing the processing and operational overhead in cases where a transmit or a receive antenna dominates.

Disclosed are systems and methods which provide high bandwidth data communication with respect to a large coverage area using smart antenna and / or directional antenna (referred to herein as multi-beam antenna) technology. Circuitry may be provided at a WLAN AP to provide selection of particular antenna beams used in the downlink and / or uplink, control of multicast transmission, control of unicast transmission, and to provide antenna pattern shaping techniques. Embodiments implement multi-beam antenna technology with little or no hardware modifications to AP circuitry. Other embodiments implement multi-beam technology using radio front-end and / or radio hardware modifications to AP circuitry. Various diversity techniques may be implemented, such as selection diversity, maximum ratio combining, and equal gain combing. To provide desired antenna pattern shaping, phase offsets with respect to a signal as transmitted in each antenna beam may be employed.

A hardware is used to perform an SSDT processing, thereby avoiding performance degradation than otherwise would occur due to load increase caused by a software processing, and thereby realizing a base station that can instantaneously perform a transmission control and provide a high speed site selection. In order to perform a site selection diversity power control (SSDT) for the purpose of reducing the amount of interference that would be caused by transmitting the same data to a plurality of cells or antennas during soft-handover, an encode processing part (1) is used to add a transmission control bit to the transmitted data. In response to this transmission control bit, a transmission control signal selecting circuit (206) selects a transmission control signal of destination. An output control circuit (207) receives, as its inputs, a transmission spread signal and the transmission control signal to perform an output control and instantaneously perform a transmission control, thereby realizing a high-speed site selection.

A receiving diversity apparatus and method for a mobile station in an HDR mobile communication system measures C / I values of pilot channels on respective antennas, measures a C / I value of in-phase combined pilot channel, and then selectively performs one of a selection diversity receiving operation and an in-phase combining receiving operation according to the measured C / I values. An optimal diversity receiving status is then maintained according to changes of a presently received pilot channel, and the optimal diversity receiving operation between the selection diversity receiving operation and the in-phase combining diversity receiving operation is selected at a starting point of the pilot channel.

An apparatus and method for improving antenna diversity in a receiver of a broadband wireless communication system using multiple antennas are provided. The receiver with the diversity apparatus uses a structure of multiple analog front ends, a structure for measuring antenna-by-antenna reception power values / Carrier-to-Interference plus Noise Ratios (CINRs) after Fast Fourier Transform (FFT) using a single analog front end, and a structure based on a single analog front end for measuring antenna-by-antenna reception power values after Analog-to-Digital (A / D) conversion without use of FFT. When a receive antenna is selected, the measured reception power values / CINRs are used. In a system for transmitting pilot signals with preamble data in a regular pattern, the receiver can have improved performance through a suitable frequency modulation process and can be implemented at low cost, as compared with that of the conventional antenna selection diversity.

An antenna selection diversity apparatus capable of shortening, when antennas are switched in frame units, a measuring time of antennas and shortening the time of selecting an optimal antenna from among a plurality of antennas on standby. In this apparatus, an antenna selection section (109) selects one of three antennas as an antenna in actual use for a period of a plurality of frames consecutively according to selection priority stored in an antenna information storage section (108) and gives an instruction for selecting one of two antennas on standby as an antenna to be measured once at a period of a plurality of frames to an antenna selection switch (104). When the reception level of the antenna in actual use measured by a reception level measuring section (107) falls below the reception level of the antenna to be measured a predetermined number of times consecutively, the antenna selection section (109) gives an instruction for selecting the antenna to be measured as the antenna in actual use to the antenna selection switch (104).

The invention discloses a variable frequency air conditioner and a control method and a control device thereof. The control method is applied to an outdoor unit of the variable frequency air conditioner; no communication exists between the outdoor unit and an indoor unit; and the control method comprises the following steps: a variable frequency compressor is controlled to operate according to aninitial operation frequency; the continuous operation time and the stop working frequency of the variable frequency compressor are monitored; and the operation frequency of the variable frequency compressor is controlled according to the continuous operation time and the stop working frequency. The operation frequency of the variable frequency compressor can be adjusted according to the continuousoperation time and the stop working frequency of the compressor, so that the output capacity of the compressor is changed, no communication between the indoor and outdoor units is guaranteed when theadvantages of higher comfort of the variable frequency air conditioner, higher user experience and the like are considered, the mated use is not needed, and the user selection diversity is improved.

The invention applies to the field of voice recognition as well as terminals and provides a method for displaying an application. The method for displaying the application comprises the following steps: recognizing an input voice command; detecting at least one application matched with the voice command and installed in the terminal according to the input voice command; displaying the icon of theat least one application matched with the voice command. With adoption of the method for displaying the application provided by the embodiment, the applications installed in the terminal are detectedaccording to the input voice command, icons of the matched applications are displayed in a centralized manner, selection diversity of users is improved, the users can operate each type of the applications with the same class or function conveniently, voice matching meets users' demands better, and user experience is improved.

The invention discloses a temperature gradient energy storage heat exchanger. The temperature gradient energy storage heat exchanger comprises a front clamping plate, a rear clamping plate and at least two sets of plates overlapped between the front clamping plate and the rear clamping plate to form fluid channels in a sealed mode in sequence. The four corners of the front clamping plate, the fourcorners of the rear clamping plate and the four corners of the plates are provided with circular fluid through holes correspondingly. The spaces inside the at least sets of the plates are filled withthe same phase change materials. The phase change temperatures of the phase change materials in the different sets of the plates decrease progressively in the fluid flowing direction. The temperaturegradient energy storage heat exchanger gives full play to the advantages of a plate heat exchanger such as high heat transfer coefficient, small occupied space, light weight and convenient manufacturing and achieves the purpose of improving the energy utilization efficiency through combination with the phase change materials with the characteristics of large heat storage capacity, environmental protection and selection diversity. The operational suitability is improved through independent cold and hot fluid channels. The temperature gradient energy storage heat exchanger has the advantages ofbeing large in energy storage density, convenient to operate and high in adaptability and can be applied to the fields of solar thermal collectors, heat pump heat collectors and industrial waste heatrecovery.

A method and system for antenna selection diversity with dynamic gain control. A receiver selects a starting antenna and dwells on it until an incoming signal is detected. An AGC is applied on the received signal and an estimate of the received power is determined for the starting antenna. The receiver may dwell on other antennas if the signal in the first antenna is not strong enough for signal processing. The gain of an antenna may be set by the gain and power levels of the previously dwelled-on antennas and / or by a power coupling factor that exists between the antennas in an antenna switch. The receiver switches through the remaining antennas as long as necessary to select at least one of the antennas for signal processing. Dynamically adjusting the gain of antennas in a diversity system provides a more accurate and efficient antenna selection scheme.

A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a reception signal of a sub antenna is less than a predetermined threshold value, and when a difference in phase between the reception signal of the main antenna and the reception signal of the sub antenna exceeds another predetermined threshold value, a combination ratio of a combiner for combining outputs of a main tuner and of a sub tuner is set to 1:1, where in-phase combination type diversity is carried out. In other cases, the combination ratio of the combiner is switched between 1:0 and 0:1 depending on the occurrence of a multipath, where selection diversity is carried out.

An apparatus and method for antenna selection diversity are provided. Antennas are selected by summing moments of space-time block encoded signals received via each respective antenna and selecting at least one antenna with the largest moment sum.

The invention discloses a vase fish tank which comprises a fish tank and a vase, wherein the vase is arranged above the fish tank, the bottom of the vase is provided with a through hole communicated with an inner cavity of the fish tank, the inner part of the vase is provided with ice soilless nutrient body, the fish tank is arranged on a fish tank base internally provided with a circulating water pump, the bottom of the fish tank is provided with a water outlet communicated with the inner cavity of the fish tank and the circulating pump, and an outlet pipe of the circulating pump extends outside an opening of the vase from the outside of the vase. The vase and the fish tank can be placed in an overlapping way, i.e. plant landscape is arranged in the vase and water landscape is arranged in the fish tank, therefore, the vase fish tank can be used for planting various plants including land plant so as to have good selection variety; solid material produced by the water plant can be used as nutrient source of the plant, so the vase fish tank is easy to build and maintain natural balance, and has strong ornamentation effect because of strong integral sight and special model.

Certain embodiments of the invention may be found in a method and system for antenna selection diversity with prediction. An antenna diversity system may use information that it has stored on the antenna selection process in previous frames to predict the starting receiving antenna and the starting transmission antenna for the next frame. The prediction may be based on which antennas were selected in previous frames or may be based metrics associated with performance of the antennas. Prediction may be based on a majority polling scheme of previously selected antennas in a determined number of previous frames. Prediction may also be based on a weighted sum of at least one selection metric for all antennas in a determined number of previous frames. Antenna prediction provides a significant performance improvement by reducing the processing and operational overhead in cases where a transmit or a receive antenna dominates.

An obscuration ‘information’-aided mechanism controls which of a plurality of spatially diverse antennas having different views of a satellite is to be coupled to a receiver, by comparing respective spatial maps of quantized visibility values, representative of the abilities of the antennas to see the satellite, with information representative of the pointing directions of the antennas. The antenna having the best view of the satellite is selected.

A method and system for antenna selection diversity with dynamic gain control. A receiver selects a starting antenna and dwells on it until an incoming signal is detected. An AGC is applied on the received signal and an estimate of the received power is determined for the starting antenna. The receiver may dwell on other antennas if the signal in the first antenna is not strong enough for signal processing. The gain of an antenna may be set by the gain and power levels of the previously dwelled-on antennas and / or by a power coupling factor that exists between the antennas in an antenna switch. The receiver switches through the remaining antennas as long as necessary to select at least one of the antennas for signal processing. Dynamically adjusting the gain of antennas in a diversity system provides a more accurate and efficient antenna selection scheme.

The invention relates to a reduced graphene oxide / polyacrylonitrile composite fiber and a preparation method thereof. The method is that after graphene oxide is assembled onto the surfaces of amino group-containing polyacrylonitrile fibers by magnetic attraction and chemical bonding, reduction treatment is carried out, so that the reduced graphene oxide / polyacrylonitrile composite fiber is obtained. The average volume resistivity of the reduced graphene oxide / polyacrylonitrile composite fiber prepared by the method is less than or equal to 30 Omega.cm, reduced by 12 orders of magnitude in comparison with the average volume resistivity of the raw filament; moreover, the decrease rate of the breaking strength is less than or equal to 5 percent relative to the decrease rate of the breaking strength of the raw filament, the increase rate of the elongation at break is greater than or equal to 58 percent relative to the increase rate of the elongation at break of the raw filament, and afterdeionized water is utilized to wash the composite fiber for 10 to 20 times, the average volume resistivity of the fiber is less than or equal to 33 Omega.cm. The method disclosed by the invention hasthe advantages of reducing agent selection diversity, good reduction effect, low production cost and the like, the produced fiber has good conductivity and durability, and furthermore, the inherent excellent mechanical property of the fiber is kept.

The present invention provides a narrowband OFDM (NOFDM) system with frequency diversity redundant transmission and receiver diversity selection and combining scheme. The communication channel is segmented into independent plurality of sub-channels. The sub-channels can be used in an aggregated mode to transmit different data on every sub-channel or in a number of redundant modes, where the same data is sent on multiple sub-channels to achieve maximum robustness of communication. Redundant modes may include channel selection diversity and / or weighted channel combining diversity.

The invention discloses a multifunctional garment sewing machine which comprises a rack and a control system, wherein a worktable and a rotating mechanism are arranged on the rack; a plurality of working areas are formed in the worktable; the rotating mechanism comprises a rotating disc; the rotating disc is arranged in the middle of the worktable; a first rotating shaft which rotates along the rotating disc is longitudinally arranged on the rotating disc; the first rotating shaft is composed of a plurality of equally divided intervals; the number of the intervals is equal to that of the working areas; the bottom of each interval is connected with the rotating disc by virtue of a Y-axis transmission mechanism so as to realize Y-direction movement of the intervals on the rotating disc; a second rotating shaft is transversely arranged on each interval; a plurality of working groups with different using functions are arranged on the second rotating shaft; the plurality of working groups are respectively uniformly and fixedly distributed on the second rotating shaft by taking the second rotating shaft as an axis and are positioned just above the worktable; and function switching of the working groups is realized by virtue of rotation of the second rotating shaft. According to the invention, the rotating mechanism is combined with the plurality of working groups, so that function selection diversity and automatic operation are realized.

Methods and systems for choosing at least one signal path are disclosed. Aspects of the method may include determining a signal quality metric for each of a plurality of signal paths, modifying the signal quality metric for each of the plurality of signal paths, and selecting at least one signal path based on at least one modified signal quality metric. At least one of the signal paths may be cycled through and the signal quality metric may be biased and / or increased and / or decreased for each of the plurality of signal paths by a fixed amount and / or by a predetermined amount. The signal quality metric may also be dynamically changed for each of the plurality of signal paths.

Described herein is an apparatus for inclusion in a station of a wireless network, and a method implemented in a station of a wireless network. The method includes wirelessly receiving data via each of a plurality of antennas (703and 705), the data corresponding to a packet of information transmitted from a remote station, sampling the received data corresponding to the received packet to form data samples for each of the antennas, and determining a measure of signal quality from samples of the received data for each of the antennas. The method further includes selecting (1003) one of the plurality of receive antennas as the antenna for receiving from the remote station according to the determined measure of signal quality.

A receiving diversity apparatus and method for a mobile station in an HDR mobile communication system measures C / I values of pilot channels on respective antennas, measures a C / I value of in-phase combined pilot channel, and then selectively performs one of a selection diversity receiving operation and an in-phase combining receiving operation according to the measured C / I values. An optimal diversity receiving status is then maintained according to changes of a presently received pilot channel, and the optimal diversity receiving operation between the selection diversity receiving operation and the in-phase combining diversity receiving operation is selected at a starting point of the pilot channel.

The invention relates to methods for scheduling at least one out of K transmission channels k with respective Nt,k transmission interfaces and respective Nr,k reception interfaces for the transmission of data symbols that are matrix or vector modulated, the method comprising calculating a respective Channel Quality Indicator (CQI) qk for at least one of the K transmission channels, and scheduling at least one of the K transmission channels for the transmission of the matrix or vector modulated data symbols, wherein the scheduling is at least partially based on the calculated CQIs qk. The invention further relates to devices, transmitting stations, wireless communication systems, computer programs and computer program products.

The invention belongs to the field of building decoration spraying and discloses fluorocarbon paint for a building sheet material and a preparation method thereof. The fluorocarbon paint has high color fidelity, selection diversity, good wear resistance, excellent weatherability, good corrosion resistance, ultraviolet resistance, and long service life, can be dried at a normal temperature, can be used simply, is suitable for a plurality of base materials and has a low price.

The present invention discloses an information alternation combination method in multi-point collaboration receiving, and belongs to the design field of combined receiver in wireless communication. The collaboration point only transmits the bit information and signal-to-noise ratio of hard decision or the signal interference noise ratio after detection or the average value of absolute value of bit likelihood ratio to the master node. The master node firstly reconstructs bit soft information according to the hard decision information of collaboration node, and the signal-to-noise ratio or signal interference noise ratio or the average bit likelihood ratio. Then the soft decision of information is obtained after superposing the soft information itself with the soft information of reconstructed collaboration point. The method can reduce the rate of information alternating between the nodes and can obtain the capability which is better than the selection diversity.

The invention relates to a cache optimization method for an SCN cellular network supporting MEC, When the user finds the required request content, the content can be cached in the MEC server in the SCN, so that the user can accurately obtain the corresponding encoded data when switching between the base stations, the accuracy of data transmission and transmission efficiency are improved, and faster response time is ensured. The invention adopts the genetic algorithm to optimize the throughput expression result value obtained by the particle swarm algorithm and the discrete particle swarm algorithm to obtain the optimal solution, and fully considers the gain balance among the content diversity, the channel selection diversity and the mobile diversity, so as to realize the maximum throughput.