Abstract: An anti-freeze faucet structure contains: a first pipe, a second pipe, a first control valve, a spring, a check valve, and a second control valve. The first pipe includes an orifice, an outlet, an inlet, a stop rim, and an inner screwing section. The second pipe is disposed in the first pipe and includes an aperture and a rotatable knob. The first control valve is joined with the second pipe and includes a through hole, an outer screwing section, a water passage, and a water channel. The spring is mounted in the through hole and is stopped by a limiting rib. The check valve is secured in the through hole and includes a stopping plug and a water stop portion. The second control valve is connected with the water channel to position the spring and the check valve and includes an inlet channel and a close ring.

Abstract: An anti-freeze faucet structure contains: a first pipe, a second pipe, a first control valve, a spring, a check valve, and a second control valve. The first pipe includes an orifice, an outlet, an inlet, a stop rim, and an inner screwing section. The second pipe is disposed in the first pipe and includes an aperture and a rotatable knob. The first control valve is joined with the second pipe and includes a through hole, an outer screwing section, a water passage, and a water channel. The spring is mounted in the through hole and is stopped by a limiting rib. The check valve is secured in the through hole and includes a stopping plug and a water stop portion. The second control valve is connected with the water channel to position the spring and the check valve and includes an inlet channel and a close ring.

Abstract: An anti-freeze faucet structure contains: an outer pipe, an inner pipe, a control valve, a resilient element, a unidirectional sealing gasket, and a controlling assembly. The outer pipe includes an inlet, an outlet, an opening, an intake valve, and a channel, wherein the channel has plural inner threads. The inner pipe includes a connecting segment and a fitting segment opposite to the connecting segment, the fitting segment has a peripheral protrusion, and the peripheral protrusion has a plurality of outer threads screwing with the plural inner threads of the outer pipe. The control valve movably is fitted on the fitting segment to abut against and close the inlet; the resilient element is fixed in the inner pipe to push against the control valve; the unidirectional sealing gasket is fitted onto the inner pipe; and the controlling assembly is disposed on the opening of the outer pipe.

Abstract: An anti-freeze faucet structure contains: an outer pipe, an inner pipe, a control valve, a resilient element, a unidirectional sealing gasket, and a controlling assembly. The outer pipe includes an inlet, an outlet, an opening, an intake valve, and a channel, wherein the channel has plural inner threads. The inner pipe includes a connecting segment and a fitting segment opposite to the connecting segment, the fitting segment has a peripheral protrusion, and the peripheral protrusion has a plurality of outer threads screwing with the plural inner threads of the outer pipe. The control valve movably is fitted on the fitting segment to abut against and close the inlet; the resilient element is fixed in the inner pipe to push against the control valve; the unidirectional sealing gasket is fitted onto the inner pipe; and the controlling assembly is disposed on the opening of the outer pipe.

Abstract: A method for determining signal phase rotation of sub-channels within a contiguous transmission bandwidth comprises the steps of: determining a fundamental set of phase rotations; performing a cyclic shift operation for the fundamental set of phase rotations to generate a cyclic-shifted set of phase rotations; multiplying the cyclic-shifted set of phase rotations by a complex constant to generate a final set of phase rotations; and determining the phase rotation of each sub-channel within the contiguous transmission bandwidth according to the final set of phase rotations.

Abstract: A method and system is disclosed for grouping the multiple stations connected to an access point (AP). The system and method comprise sending a sounding packet to a plurality of stations, wherein the stations may be all or part of the stations that are located within the range of the AP. The stations that receive the sounding packets respond to the AP, and the AP determines the channel state information (CSI) from the responses. According to the CSI, the AP divides the multiple stations into several groups. According to an embodiment of the present invention, a confirmation step is performed to each group of stations, respectively. The AP sends a second sounding packet to each group of stations, and verifies the CSI between each station group by group. Therefore, the method and system provides for monitoring the validation of each group by periodically sending sounding packets to each group.

Abstract: A method and system is disclosed for grouping the multiple stations connected to an access point (AP). The system and method comprise sending a sounding packet to a plurality of stations, wherein the stations may be all or part of the stations that are located within the range of the AP. The stations that receive the sounding packets respond to the AP, and the AP determines the channel state information (CSI) from the responses. According to the CSI, the AP divides the multiple stations into several groups. According to an embodiment of the present invention, a confirmation step is performed to each group of stations, respectively. The AP sends a second sounding packet to each group of stations, and verifies the CSI between each station group by group. Therefore, the method and system provides for monitoring the validation of each group by periodically sending sounding packets to each group.

Abstract: A method, for determining a first amount of a plurality of high-throughput long training fields within a packet in a wireless communication system, includes determining a second amount of a plurality of space time streams needed by the wireless communication system transmitting the packet, and setting the first amount to be greater than or equal to 8 when the second amount is greater than 4.

Abstract: The present invention discloses a multi-user (MU) transmission method for a multiple input multiple output (MIMO) transmission system comprising a first station and a plurality of second stations. The MU transmission method includes the step of the first station performing simultaneous transmission to a first group of stations of the plurality of second stations in a first transmission interval.

Abstract: An anti-inundation and drainage structure for an anti-freeze faucet contains a tube body, a controlling valve, and a control assembly. The tube body includes a chamber, an inlet, an outlet, and a coupling hole. The controlling valve is fixed in the chamber and includes a housing, an axial bolt, a first check device, a connector, a second check device, a ceramic shifting piece, a ceramic fixing piece, and a positioning member. The control assembly is coupled with the coupling hole and includes a rotating member connecting with a rod in the chamber of the tube body, the rod has a hollow passage defined therein and an air port formed on one end thereof so as to couple with the rotating member, another end of the rod relative to the air port is inserted into the second segment of the slot of the connector of the controlling valve.

Abstract: A method of arranging a packet in a wireless communication system includes a preamble sequence and a data sequence. The preamble sequence includes a legacy training field (L-TF), a legacy signal field (L-SIG), a very high throughput signal field (VHT-SIG), a very high throughput short training field (VHT-STF) and at least one very high throughput long training field (VHT-LTF). The method includes generating a first VHT-SIG field and a second VHT-SIG field according to the VHT-SIG field; and arranging the L-TF field, the L-SIG field, the first VHT-SIG field, the VHT-STF field, one of the at least one VHT-LTF fields, the second VHT-SIG field and the rest of the at least one VHT-LTF fields in a predetermined sequence.

Abstract: A method of generating preamble sequence is disclosed. A channel used by a wireless device may be divided into four sub-channels, and the method includes forming a preamble sequence of a first sub-channel, making three replicas of the preamble sequence of the first sub-channel, each replica with a phase rotation of a first angle, a second angle, and a third angle respectively, for forming each preamble sequence of a second sub-channel, a third sub-channel, and a fourth sub-channel, and arranging the preamble sequences of the first, the second, the third, and the fourth sub-channels to form a preamble sequence of the channel.

Abstract: Disclosed is a method and apparatus for dynamic channel assignment (DCA) in a wireless network, which describes the complex channel assignment problem with a decoding problem. The invention describes the decoding problem with a normal graph and specifies all the local rules enforced by all the nodes at access point sides and subscriber sides. Then, the invention carries out the sum-product algorithm to solve the DCA. It is not only a fully-distributed low-complexity DCA technology, but also significantly increases the network throughput. The invention further adopts the concept of subscriber exclusive region to guarantee the link quality between a subscriber and an access point.

Abstract: A method of reducing a signal peak to average power ratio (PAPR) for a transmission channel in a wireless communication system is disclosed. The transmission channel is divided into a plurality of channel segments, and the method includes calculating PAPRs corresponding to the plurality of channel segments by a plurality of phase rotation vectors; selecting a plurality of specified phase rotation vectors from the plurality of phase rotation vectors according to the calculated PAPRs; and using one of the plurality of specified phase rotation vectors to rotate a phase of a signal to be transmitted.

Abstract: A method and related system of transmission channel detection condition in a wireless communication system are disclosed. The method includes receiving a symbol, performing a channel estimation operation to generate a channel estimation result according to the symbol, performing a cross correlation operation on the channel estimation result and an initial channel estimation result to generate an operation result, and determining whether the condition of the transmission channel have changed or not.

Abstract: The method for beamforming in a wireless communication system comprises the steps of: receiving a sounding packet so as to estimate channel state information between a transmitter and a receiver; generating a beamforming matrix in accordance with the channel state information; generating a beamforming steering matrix by multiplying the beamforming matrix by a rotation matrix; and feeding back the beamforming steering matrix.

Abstract: An approximation method for SNR soft information for a transmitter of a communications system includes obtaining a conditional probability density function (PDF) corresponding to a response message of a transmitted packet, obtaining a PDF of a probability distribution model, and a mean and a variance of the PDF, by approximating the conditional PDF corresponding to the response message with the probability distribution model, and calculating a second mean and a second variance of a second PDF approximated to a conditional PDF of SNR corresponding to the transmitted packet according to the mean and the variance of the PDF, and a first mean and a first variance of a first PDF approximated to a conditional PDF of SNR corresponding to another transmitted packet immediately preceding the transmitted packet.

Abstract: A block interleaving method for interleaving data of a transmitter in a wireless communication system is disclosed. The wireless communication system supports a multi-input multi-output (MIMO) technique for transmitting data via a plurality of spatial streams. The block interleaving method includes when the transmitter transmits a plurality of data through the MIMO technique, determining an order of the plurality of data according to the following equation, r = ( j - ( ( ( i SS - 1 ) × M ) ? mod ? q + q × floor ? ( i SS - 1 q ) ) × N ROT ? × BPSCS ? ( i SS ) ) ? mod ? N CBPSS ? ( i SS ) ; ? j = 0 , 1 , … ? , N CBPSS ? ( i SS ) - 1 ; ? M = 1 , 2 , … ? , q - 1.

Abstract: A block interleaving method for interleaving data of a transmitter in a wireless communication system is disclosed. The wireless communication system supports a multi-input multi-output (MIMO) technique for transmitting data via a plurality of spatial streams. The block interleaving method includes when the transmitter transmits a plurality of data through the MIMO technique, determining an order of the plurality of data according to the following equation, r = ( j - ( ( ( i SS - 1 ) × M ) ? mod ? 7 + 7 × floor ? ( i SS - 1 7 ) ) × N ROT × N BPSCS ? ( i SS ) ) ? mod ? N CBPSS ? ( i SS ) ; j = 0 , 1 , … ? , N CBPSS ? ( i SS ) - 1 ; M = 1 , 2 , … ? , 6.