Abstract: The present invention discloses a terminal access method and an apparatus, to resolve a problem in an existing SCMA multi-terminal access mechanism that a conflict causes system performance degradation and may cause system retransmission. The method is as follows: determining, by a terminal, to enter a contention-based access phase; and determining, by the terminal during each transmission of binary data, a first signature according to a random number seed and a signature matrix, and mapping, according to the first signature, the binary data to a multi-dimensional symbol for transmission, where first signatures used during different transmissions of binary data are different.

Abstract: Systems, methods, and devices relating to short range wireless communications. A host device wirelessly communicates with a user device. The transceiver on the host device is of a greater complexity than the transceiver on the user device. The host device performs a number of signal processing steps on data to be exchanged with the user device such that the complexity of the processing to be done by the user device is significantly reduced. This approach thereby reduces the complexity of the transceiver on the user device. The host device processing includes pre-channel equalization and pre-synchronization.

Abstract: Embodiments of the present disclosure provide for materials that include a pre-designed patterned, porous membrane (e.g., micro- and/or nano-scale patterned), structures or devices that include a pre-designed patterned, porous membrane, methods of making pre-designed patterned, porous membranes, methods of separation, and the like.

Abstract: A method of manufacturing a protection frame used in a miniature microphone is provided.

Abstract: The present invention is an adaptive secure wireless communications system and method. Generally, the present invention may be operable to address challenges and threats to a secure communication session. The secure wireless communication system of the present invention may operate one or more of the following: multiple physical-layer attributes monitoring; multiple parameter confidence testing related to transceiver (Tx-Rx) specific environment and transmitter receiver hardware characteristics; continuous and interleaved authentication; and security enhancement using dynamic adaptation of the transmission system parameters based concurrent and/or conjugated transmission of data-carrying signal and security control information. The real-time physical-layer related monitoring and interaction between transmitter and receiver, using Tx-Rx related physical environment, of the present invention may effectively reduce many wireless security threats including interception and spoofing.

Abstract: The present invention is an integrated wireless system with multiple functionalities including robust (indoor/outdoor) position location, mobile receiver tracking and adaptive broadband communication. The present invention may be an adaptive position location system for local and indoor applications with improved accuracy, flexibility and security. The self-calibration technique of the present invention may cause, the position location system to be easily deployed. A master station may communicate with and control two or more slave stations and one or more user devices and thereby determine the position of a user device and track that user device, utilizing location reference sets, in accordance with the location of the master station and communication between the slave stations and the master station. The locationing operation of the present invention may be initiated by the user device.

Abstract: Systems, methods, and devices relating to short range wireless communications. A host device wirelessly communicates with a user device. The transceiver on the host device is of a greater complexity than the transceiver on the user device. The host device performs a number of signal processing steps on data to be exchanged with the user device such that the complexity of the processing to be done by the user device is significantly reduced. This approach thereby reduces the complexity of the transceiver on the user device. The host device processing includes pre-channel equalization and pre-synchronization.

Abstract: The present invention provides a condenser microphone. In one embodiment, the condenser microphone comprises: a frame of the microphone formed of a circuit board substrate and a casing, and an amplifier device, an elastic holding component and capacitance components provided inside the microphone. One or more sound holes are provided on the circuit board substrate or the casing. The capacitance components are provided on the side with the sound holes. The amplifier device is provided on the side opposite to the side with the sound holes. The elastic holding component is provided on the side with the amplifier device or on the side with the capacitance components.

Abstract: The present invention is an adaptive secure wireless communications system and method. Generally, the present invention may be operable to address challenges and threats to a secure communication session. The secure wireless communication system of the present invention may operate one or more of the following: multiple physical-layer attributes monitoring; multiple parameter confidence testing related to transceiver (Tx-Rx) specific environment and transmitter receiver hardware characteristics; continuous and interleaved authentication; and security enhancement using dynamic adaptation of the transmission system parameters based concurrent and/or conjugated transmission of data-carrying signal and security control information. The real-time physical-layer related monitoring and interaction between transmitter and receiver, using Tx-Rx related physical environment, of the present invention may effectively reduce many wireless security threats including interception and spoofing.

Abstract: A method for adaptive signal communication on a wireless or wireline network is disclosed including detecting the communication environment or determining the communication requirements, for communication on the wireless or wireline network. The method may include determining system parameter information for adaptive Orthogonal Frequency Division Multiplexing (OFDM) based on the communication environment or communication requirements and encoding the system parameter information into at least one precoded cyclic prefix (PCP) sequence. The method further provides for generating an OFDM symbol transmission by combining at least one PCP, and an adaptive OFDM symbol, using the system parameters, then transmitting the signal from at least one OFDM transmitter to at least one OFDM receiver followed by demodulating the at least one PCP, and demodulate the OFDM signal using the system parameters recovered.

Abstract: A miniature microphone is provided.

Abstract: A method for identifying a transmitter in a digital broadcasting system includes: receiving a broadcast signal in which a TxID sequence for identification of a transmitter is embedded; correlating the received broadcast signal with a plurality of elementary code sequences of a pseudo-random sequence sequentially; and identifying the transmitter by using the correlation results.

Abstract: To optimize the performance of DSL modems in the same cable bundle, the size and position of the group of subcarriers used for transmission is intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by all subcarriers. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the groups of subcarriers within the total available subcarriers, near-end crosstalk (NEXT) noise within the cable bundle may be minimized.

Abstract: The present invention is an integrated wireless system with multiple functionalities including robust (indoor/outdoor) position location, mobile receiver tracking and adaptive broadband communication. The present invention may be an adaptive position location system for local and indoor applications with improved accuracy, flexibility and security. The self-calibration technique of the present invention may cause, the position location system to be easily deployed. A master station may communicate with and control two or more slave stations and one or more user devices and thereby determine the position of a user device and track that user device, utilizing location reference sets, in accordance with the location of the master station and communication between the slave stations and the master station. The locationing operation of the present invention may be initiated by the user device.

Abstract: To optimize the performance of DSL modems in the same cable bundle, the size and position of the group of subcarriers used for transmission is intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by all subcarriers. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the groups of subcarriers within the total available subcarriers, near-end crosstalk (NEXT) noise within the cable bundle may be minimized.

Abstract: The invention provides a method and device for iterative hybrid time-frequency domain block equalization of signals received via a communication channel subject to multipath interference. The equalization method includes frequency-domain equalization of blocks of received signals in a forward path, and time-domain inter-block echo correction and intra-block cyclic echo addition in the feedback path. The invention can be used for equalizing signals transmitted without cyclic prefix and subjected to multi-path interference with long delay spread.

Abstract: To optimize the performance of DSL modems in the same cable bundle, the size and position of the group of subcarriers used for transmission is intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by all subcarriers. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the groups of subcarriers within the total available subcarriers, near-end crosstalk (NEXT) noise within the cable bundle may be minimized.

Abstract: The present invention provides a condenser microphone. In one embodiment, the condenser microphone comprises: a frame of the microphone formed of a circuit board substrate and a casing, and an amplifier device, an elastic holding component and capacitance components provided inside the microphone. One or more sound holes are provided on the circuit board substrate or the casing. The capacitance components are provided on the side with the sound holes. The amplifier device is provided on the side opposite to the side with the sound holes. The elastic holding component is provided on the side with the amplifier device or on the side with the capacitance components.

Abstract: A miniature microphone is provided.

Abstract: To improve the performance of DSL modems, a DSL duplexing ratio for a new communication is selected according to the communications needs of an application. A required upstream and downstream bit rate for application communications is determined. From the ratio of these bit rates, a desired duplexing ratio is calculated. The operation of the modem is then adapted to choose a duplexing ratio that approximates the desired duplexing ratio for the application. To optimize modem operation, the size and position of the upstream and downstream bandwidths used for transmission are intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by the chosen duplexing ratio. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated.