Abstract: A paper rack with functions of accessing and playing multimedia files is provided, wherein a circuit board has transmission junctions, sockets, and a wireless receiver and emitter for connecting with a digital information equipment, a memory card, a wireless network, and a wireless receiving and emitting device, and transmitting a digital file and a multimedia file. A hard disk for storing a digital file and a multimedia file is also included in the paper rack. Moreover, a control and data processing for the aforementioned components connected can be performed through a touch screen and a control button, and the corresponding digital files and multimedia files can be further played with the touch screen, a liquid crystal display unit, and a speaker.

Abstract: A controller includes a power source unit, a drive circuit, and a state control circuit. The drive circuit is coupled to the power source unit, and includes a drive coil and a switching transistor unit. The switching transistor unit is operable in one of a circuit-making state for making an electrical circuit between the drive coil and the power source unit so as to enable the drive coil to drive rotation of a rotor of a brushless direct current motor, and a circuit-breaking state for breaking the electrical circuit between the drive coil and the power source unit. The state control circuit is coupled to the power source unit, and includes a pulse width modulator, a sensing coil, and a control transistor coupled electrically in series. The state control circuit controls operation of the switching transistor unit according to magnetic position of the rotor relative to the sensing coil.

Abstract: A chassis air guide thermal cooling solution including a fan to which protruding edges are wedged at wedge grooves of a locating assembly to locate the fan therein, locating notches of a flexible ring are positioned in the locating assembly, an accommodating ring is accommodated around the flexible ring, and the locating assembly is fastened with a locating plate by means of screws; a side panel is devised with ventilation openings for drawing external air or discharging hot air at the interior of the device. The locating assembly is provided with a plurality of flexible openings, and after having fixed the locating plate therein, an assembled position of the chassis air guide thermal cooling solution is adjusted; after having assembled the chassis air guide thermal cooling solution therein, a distance between the accommodating ring and the heat dissipating fan is adjusted using the flexible ring.

Abstract: A multipurpose extractable keyboard module cartridge, which is constructed to include a module cartridge and a keyboard. Structural characteristics include a plurality of connector ports configured at a side of the keyboard, wherewith enables connecting of digital products and devices, including electronic and electrical devices, computers, and so on. Furthermore, a connector terminal is configured on a circuit board of the module cartridge, whereby after inserting the module cartridge into a slot defined in the keyboard, the connector terminal inserts into a connector slot, whereupon the keyboard can directly read a memory card inserted into a connect slot of the module cartridge. In addition, a cover is configured atop the slot of the keyboard; whereby after removing the module cartridge, the cover can be placed over the slot and thereby prevent dust and miscellaneous objects from entering the slot.

Abstract: The present invention provides a multimedia connector reader device, wherein when a portable digital device is plugged into a connector interface within a holder slot, functionality of a transmission control circuit enables data stored in a memory card of the portable digital device to be accessed, and a connector port enables connectivity to another different type of portable digital device. Moreover, a switch controls whether the transmission control circuit of the multimedia connector reader device is actuated or not, while a controller enables accommodating different types of computer systems. An interior wireless transmission circuit and wireless transceiver interior enable wireless connection to the Internet. Furthermore, a touch display panel displays digital files stored in each connected digital device, and controls related file handling function.

Abstract: A carrier recovery apparatus for digital Quadrature Amplitude Modulation (QAM) receivers is disclosed. The carrier recovery apparatus includes a phase detector, a lock controller, a frequency locker and a phase loop filter, and provide phase/frequency error information for a numerically controlled oscillator (NCO) to generate recovered carrier frequency. The phase detector detects the symbol energy information and the phase error information of the extracted symbols from the I/Q extractor. The lock controller monitors the symbol energy from the phase detector, separates the extracted symbols into two groups: valid and non-valid, and outputs the control flag of valid symbols into both the frequency locker and the phase loop filter. To achieve a wide range acquisition and a good tracking performance, the lock controller controls the operation of the frequency locker and the phase loop filter in three operations.

Abstract: A systolic product-sum calculator for computing A*B+C over multi-basis in Galois fields GF(2m) includes a systolic architecture comprises a plurality of basic cells arranged in m rows and m columns, at least one row of n multiplexers disposed between two pre-determined rows, n and n-1, and a column of stacked multiplexers. At least one selection line is used to control the multiplexers for selecting the outputs over multi-basis including at least GF(2m) or GF(2n).

Abstract: A multipurpose extractable keyboard module cartridge, which is constructed to include a module cartridge and a keyboard. Structural characteristics include a plurality of connector ports configured at a side of the keyboard, wherewith enables connecting of digital products and devices, including electronic and electrical devices, computers, and so on. Furthermore, a connector terminal is configured on a circuit board of the module cartridge, whereby after inserting the module cartridge into a slot defined in the keyboard, the connector terminal inserts into a connector slot, whereupon the keyboard can directly read a memory card inserted into a connect slot of the module cartridge. In addition, a cover is configured atop the slot of the keyboard; whereby after removing the module cartridge, the cover can be placed over the slot and thereby prevent dust and miscellaneous objects from entering the slot.

Abstract: A chassis air guide thermal cooling solution including a fan to which protruding edges are wedged at wedge grooves of a locating assembly to locate the fan therein, locating notches of a flexible ring are positioned in the locating assembly, an accommodating ring is accommodated around the flexible ring, and the locating assembly is fastened with a locating plate by means of screws; a side panel is devised with ventilation openings for drawing external air or discharging hot air at the interior of the device. The locating assembly is provided with a plurality of flexible openings, and after having fixed the locating plate therein, an assembled position of the chassis air guide thermal cooling solution is adjusted; after having assembled the chassis air guide thermal cooling solution therein, a distance between the accommodating ring and the heat dissipating fan is adjusted using the flexible ring.

Abstract: A multipurpose media player memory card reader having a system flow that occurs upon inserting a memory card into a memory card reader slot, whereupon a circuit of the memory card reader reads data stored within the memory card or a control circuit reads data stored within memory. Multimedia data is transmitted to a multimedia player circuit and converted into sound signals for output through an outlet. When playing multimedia data the multipurpose media player memory card reader is further adapted to reciprocally connect to a computer port through a connector port of the multipurpose media player memory card reader, thereby the multipurpose media player memory card reader achieves functionality as a removable connected hard disk, whereby a user is able to save data within a memory card and memory through the multipurpose media player memory card reader.

Abstract: A metric generation scheme for use in OFDM receivers. In a preferred embodiment, an OFDM receiver of the invention includes a dynamic quantizer to compress a series of channel-state information values. Also, a bit de-interleaver is provided to de-interleave a series of symbol-based data inverse to interleaving operations at a transmitter end. The de-interleaved symbol-based data is further compressed by another dynamic quantizer to yield a complex signal according to a constellation scheme. Then a metric generator calculates a bit metric of a zero group and a bit metric of a one group for each received bit in which the constellation is divided into the one group and the zero group for each bit location.

Abstract: The present invention provides a multifunctional remote control device. It characterizes that after a memory card is inserted in the memory card slot, memory card control circuit instantly reads the audio/visual data in the memory card. Meanwhile the control button on the panel keyboard directs the commands to a control circuit through a panel circuit. Said control circuit drives the memory card control circuit to send audio/visual data to coding circuit which translates said data to wireless signals. The wireless signals are then sent by a transmitter and picked up by the receiving device of the receiver. A power source joint disposed at the rear side of the receiver is for the power supply. Said panel keyboard sends audio/visual viewing commands such as forwarding, rewarding and volume through the control circuit.

Abstract: An apparatus and method for estimation of channel state information in OFDM receivers. According to the invention, a noise power estimator is provided to evaluate an average noise power estimate on a sub-carrier of an OFDM symbol. Furthermore, a channel power calculator is provided to calculate a channel power on the sub-carrier from a channel response estimate. By calculating a ratio of the channel power to the average noise power estimate of the sub-carrier, a CNR calculator can estimate a carrier-to-noise ratio on the sub-carrier. Based on the carrier-to-noise ratio of the sub-carrier and a predetermined threshold, a CSI generator thus determines a CSI estimate for the sub-carrier. If the carrier-to-noise ratio of the sub-carrier is less than the predetermined threshold, the CSI estimate for the sub-carrier is set to the carrier-to-noise ratio of the sub-carrier divided by the predetermined threshold; otherwise, it is set to one.

Abstract: A method for estimating channels of an OFDM signal. The method comprises the steps of deriving responses of pilot channels, deriving responses of first data channels by time and frequency domain combined linear interpolation among the responses of the pilot channels, deriving each response of boundary channels by frequency domain linear interpolation between the responses of the nearest pilot and first data channels, and deriving responses of second data channels by frequency domain extrapolation using the responses of the pilot and first data channels.

Abstract: A multifunctional extractable card reading modular cartridge connectable to a wireless broad band network router comprises an adapter box; an extractable wide band router modular cartridge installed in the adapter box and having two connecting terminals. The two connecting terminals of the extractable wide band router modular cartridge are capable of being electrically connected to two connecting ports of a wireless extractable card reading route. A front end of adapter box further has a USB port and an IEEE 1394 port for connecting other external devices; the USB port and the IEEE 1394 port are extended into the extractable wide band router modular cartridge in the adapter box; and a rear end of the adapter box 2 is installed with a 2×5 port 21 and an IEEE 1394 port 22 for connecting external devices.

Abstract: A universal coupler device includes a housing for coupling to various computer facilities, a circuit board received in the housing, two IEEE couplers and two USB couplers attached to the circuit board, one or more processor devices coupled to the IEEE couplers and the USB couplers, and a coupling box having a coupler element for detachably coupling to a coupler member of the circuit board and having one or more sockets for plugging various card members, and for allowing various card members to be coupled to the computer facility with the coupling box.

Abstract: A universal coupler device includes a housing for coupling to various computer facilities, a circuit board received in the housing, two IEEE couplers and two USB couplers attached to the circuit board, one or more processor devices coupled to the IEEE couplers and the USB couplers, and a coupling box having a coupler element for detachably coupling to a coupler member of the circuit board and having one or more sockets for plugging various card members, and for allowing various card members to be coupled to the computer facility with the coupling box.

Abstract: A carrier recovery apparatus for digital Quadrature Amplitude Modulation (QAM) receivers is disclosed. The carrier recovery apparatus includes a phase detector, a lock controller, a frequency locker and a phase loop filter, and provide phase/frequency error information for a numerically controlled oscillator (NCO) to generate recovered carrier frequency. The phase detector detects the symbol energy information and the phase error information of the extracted symbols from the I/Q extractor. The lock controller monitors the symbol energy from the phase detector, separates the extracted symbols into two groups: valid and non-valid, and outputs the control flag of valid symbols into both the frequency locker and the phase loop filter. To achieve a wide range acquisition and a good tracking performance, the lock controller controls the operation of the frequency locker and the phase loop filter in three operations.

Abstract: A systolic product-sum calculator for computing A*B+C over multi-basis in Galois fields GF(2m) includes a systolic architecture comprises a plurality of basic cells arranged in m rows and m columns, at least one row of n multiplexers disposed between two pre-determined rows, n and n−1, and a column of stacked multiplexers. At least one selection line is used to control the multiplexers for selecting the outputs over multi-basis including at least GF(2m) or GF(2n).