Abstract: A voltage-controlled oscillator gain measurement system includes a voltage-controlled oscillator, a voltage detector, and a processor. The voltage-controlled oscillator, which is configured in a phase-locked loop circuit, generates an output signal with an output frequency according to a control signal. The control signal is generated according to the output signal divided by a scaling number. The voltage detector is configured to measure a voltage difference of the control signal. The processor adjusts the scaling number to generate an output frequency difference of the output signal, and obtains a reciprocal gain of the voltage-controlled oscillator by dividing the voltage difference by the output frequency difference.

Abstract: Methods and wireless communication devices for access procedure enhancement are provided. The wireless communication device for access procedure enhancement includes a transceiver module and a communication protocol module. The transceiver module performs wireless transmissions and receptions. The communication protocol module receives a page message from a base station via the transceiver module, transmits at least one access probe via the transceiver module, and terminates the transmission of the rest of an access probe payload of the at least one access probe according to a termination criterion. Moreover, the access probe is transmitted using a transmission power which is lower than a first threshold, and the access probe is transmitted at a data rate lower than a second threshold.

Abstract: A mobile communication device configured for Machine-to-Machine (M2M) communications is provided. In the mobile communication device, a wireless module performs wireless transmissions and receptions to and from a service network, and a controller module receives a message with an extension registration period only for the M2M communications from the service network via the wireless module and periodically performs a registration procedure according to the extension registration period only for the M2M communications.

Abstract: Methods and wireless communication devices for access procedure enhancement are provided. The wireless communication device for access procedure enhancement includes a transceiver module and a communication protocol module. The transceiver module performs wireless transmissions and receptions to and from a network. The communication protocol module divides an access channel into a plurality of narrow band frequency division multiplexing (FDM) channels, groups a plurality of reverse link FDM access channels (R-FACH) into a plurality of R-FACH groups, determines whether a base station in a network supports an access probe. If yes, the base station joins at least one R-FACH group. The wireless communication device sends the access probe in a chosen R-FACH during each access procedure.

Abstract: An apparatus supporting MTC in an LTE environment including an LTE modem and a CDMA modem. The LTE modem accesses a first wireless network and executes first data transactions, where the first wireless network comports with LTE standards. The CDMA modem is operationally coupled to the LTE modem, and accesses a second wireless network and executes second data transactions, where the second wireless network comports with one or more CDMA-based standards. The CDMA modem includes an inter-radio access technology (IRAT) API element and an inter-process communication (IPC) module. The IRAT API element is configured to send/receive IRAT messages via function calls to/from the LTE modem, where the IRAT messages remain the same regardless of interface requirements for the LTE modem. The IPC module is coupled to the IRAT API element, and is configured to generalize the function calls to enable the CDMA modem to interoperate with the LTE modem.

Abstract: A multi-phase signal generator and a multi-phase signal generating method thereof. The multi-phase signal generator includes a signal generator, a first comparator, a second comparator and a logic operation circuit. The signal generator generates a periodic signal. The first comparator receives the periodic signal and respectively compares the periodic signal with a first reference voltage and a second reference voltage to generate a first output signal. The second comparator receives the periodic signal and compares the periodic signal with a first threshold voltage to generate a second output signal. The logic operation circuit performs logic operations on the first output signal and the second output signal so as to generate a plurality of first phase output signals.

Abstract: An amplifier apparatus includes a differential input pair, a current source, and a load. The differential input pair includes first and second transistors, and an auxiliary transistor. A control terminal of the first transistor receives a reference voltage. A first terminal of the second transistor is coupled to the first terminal of the first transistor, and a control terminal of the second transistor receives an input voltage. A first terminal of the auxiliary transistor is coupled to a first terminal of the first transistor, a second terminal of the auxiliary transistor is coupled to a second terminal of the first transistor, a control terminal of the auxiliary transistor receives a control voltage, and a base terminal thereof receives a power supply voltage. The current source and load are respectively coupled to the first terminals and second terminals of the first and second transistors.

Abstract: A power control method and device for mobile communication are disclosed. The power control method, performed by a mobile communication device including a controller, a radio frequency (RF) circuit and a baseband circuit, includes receiving, by the RF circuit, a first signal; determining, by the controller, when a second signal is come; turning off, by the controller, the RF circuit when the first signal is received and the second signal has not yet arrived; and processing, by the baseband circuit, the received first signal.

Abstract: Mobile communication devices and integrated circuits thereof are provided. The mobile communication device, communicating with a packet switched network and a second network, includes a transceiver, a first PLL circuit and a controller. When exchanging an ongoing data transmission with the packet switched network, the transceiver transmits a first message to the packet switched network, which indicates the mobile communication device will be tuned away from the packet switched network, and performs a subsequent procedure for the second network. The first PLL circuit provides a first clock to the transceiver. When the ongoing data transmission with the packet switched network is not completed, the controller controls the first PLL circuit to switch the first clock from a first clock frequency to a second clock frequency after the transceiver transmits the first indication message.

Abstract: A mobile communication device configured for Machine-to-Machine (M2M) communications is provided. In the mobile communication device, a wireless module performs wireless transmissions and receptions to and from a service network, and a controller module receives a message with a Slot Cycle Index (SCI) only for the M2M communications from the service network via the wireless module and instructs the wireless module to monitor a paging channel according to the SCI only for the M2M communications.

Abstract: A mobile communication device for access procedure enhancement is provided. In the mobile communication device, a wireless module performs wireless transmissions and receptions to and from a service network. Also, a controller module transmits an access probe to the service network via the wireless module, and retransmits the access probe in response to not receiving an acknowledgement of the access probe from the service network via the wireless module in a waiting period of time. The waiting period of time is determined according to a coherence-time related offset. The controller module further repeats the retransmission of the access probe until the acknowledgement of the access probe is received from the service network via the wireless module.

Abstract: Communication transmission methods and systems are provided. Firstly, a base station broadcasts a message to a user equipment, wherein the message includes a priority threshold value. Then, the user equipment compares a priority value of the user equipment with the priority threshold value. Then, an initiation of an access procedure of the user equipment is disabled when the priority value of the user equipment is below the priority threshold value.

Abstract: A method is provided for coupling a plurality of access nodes wirelessly to a plurality of access terminals. The method includes dividing up a carrier frequency into a plurality of subbands; scheduling one or more access terminals to share one of the plurality of subbands; and via one of the plurality of access nodes, first communicating with the one or more access terminals over the one of the plurality of subbands. The communicating includes, within the one of the plurality of subbands, time division multiplexing interlaces corresponding to each of the one or more access terminals.

Abstract: A system and method of enhancing transmission of highly detectable pilots (HDPs). At least one base station transmits at least one cellular signal in which each cellular signal includes repetitive HDP cycles. Each HDP cycle has a duration of N power control groups (PCGs) and includes an HDP period having a duration of M PCGs in which N is greater than M. Traffic and overhead channels are gated during each HDP period. An enhanced HDP symbol is transmitted during a selected HDP period for each set of X HDP cycles of each cellular signal. For single carrier configurations, only one enhanced HDP is transmitted at a time, or multiple HDPs are transmitted in different directions. Standard 1x pilots may be transmitted. The enhanced HDP may be a boosted standard 1x pilot or an additional standard HDP pilot. Multicarrier configurations are described with PCG or sub-chip and/or phase offsets.

Abstract: A converting circuit for receiving an input voltage and generating an output current, including: a transistor, coupled to a supply voltage at a drain of the transistor, and a source of the transistor is coupled to a first voltage, and a gate of the transistor is coupled to the input voltage and a fixed voltage; and a resistor, coupled to the input voltage and the gate of the transistor, and the output current flows through the resistor, wherein the output current is related to the fixed voltage, the input voltage and the resistor.

Abstract: A mobile station is provided. The mobile station has a plurality of removable user identification modules, key generation logic, and hash logic. The plurality of removable user identification modules are each configured to store unique corresponding information associated with a corresponding plurality of cellular subscriptions. The key generation logic is configured generate a hash key. The hash logic is coupled to the key generation logic, and is configured to employ the hash key to determine parameters and attributes for continuing communication with a base station, where each of the parameters and attributes are determined to maximize use of common hardware and software within the mobile station to concurrently provide for communications in support of the corresponding plurality of cellular subscriptions.

Abstract: An acoustic shock protection device includes a prediction gain estimator and an audio compressor. The prediction gain estimator is configured to analyze a plurality of linear prediction coefficients of an audio signal and determine a category of the audio signal. The audio compressor is coupled to the prediction gain estimator, and the audio compressor is configured to adjust a signal level of the audio signal according to the category of the audio signal.

Abstract: A method for detecting a double-talk condition and an echo cancellation system using the same are introduced herein. According to an exemplary embodiment, the method may be adapted to an double-talk detector of an echo cancellation system and includes the following steps: obtaining an input signal with a first power; computing a second power, wherein the second power is a power combination of at least one estimated signal; determining whether the double-talk condition occurs according to a relationship between the first power and the second power, when the first power is larger than the second power, the double-talk condition occurs.

Abstract: An integrated circuit (IC) and a seal ring thereof are provided. The IC includes a first seal ring. The first seal ring is disposed in the IC. The first seal ring includes at least one stagger structure. The at least one stagger structure includes at least one stagger unit. The at least one stagger unit makes staggered connection with another neighboring stagger unit.

Abstract: A system for allocating PRACH (Physical Random Access Channel) resources is provided in the invention. The system comprises a plurality of wireless terminals and a base station. The base station is configured to allow the plurality of wireless terminals to share an access slot comprising a plurality of M2M (Machine to Machine) preambles and a plurality of H2H (Human to Human) preambles, and configured to separate the plurality of M2M preambles from the plurality of H2H preambles.