Abstract:
A multiplexing system enables communication between an array (2 and 6) of transducer elements (23, 24, 25 and 26; and 50, 53, 56 and 59) and a base unit (276) using a small number of wires (40; 70; and 176, 177, 178 and 179) or wireless channels. The transducer elements may be ultrasound transducer elements. For transmissions from the transducer elements to the base unit, one or more bimodal multiplexers (8; 35; 69 and 75; 172, 173, 174 and 175) are utilized. A "bimodal" multiplexer is one which provides two shifts, with one shift being in the relative timing of signals to enable "coherent summing" and the other shift being one that enables discrimination of signal energy generated by the different transducer elements. With respect to signaling generated at the base unit for controlling operations at the array, the number of connections is reduced by employing at least one transmit demultiplexer (232, 233, 234, 235, 236, 237 and 238) at the array for receiving a multi-element drive signal for sequencing the trans¬ ducer elements. The sequencing can be configured to achieve desired beam characteristics, such as beamforming.
Abstract:
무선 통신 시스템에서 short TTI의 주파수 대역에 다이나믹하게 자원을 할당하는 방법 및 기기가 제공된다. 구체적으로, 하나의 TTI에 상응하는 서브프레임 내에 포함되고 sTTI 동안 수신되는 복수의 제1 하향링크채널과 TTI 동안 수신되는 제2 하향링크채널을 수신한다. 복수의 제1 하향링크채널은 순차적으로 수신된다. 제2 하향링크채널을 위해 사용되는 하향링크제어정보(DCI) 내에 포함된 제어정보 및 RRC 메시지를 사용하여 복수의 제1 하향링크채널을 복조한다. 제어정보 및 RRC 메시지는 복수의 제1 하향링크채널의 주파수 자원을 지시한다.
Abstract:
Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information may be sent on an uplink carrier that may or may not be paired with a downlink carrier on which data transmission is sent. A user equipment (UE) may receive data transmission on a downlink carrier among a plurality of downlink carriers. The UE may determine feedback information for the data transmission, determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and send the feedback information on the uplink carrier. In another aspect, feedback information for multiple downlink carriers may be sent on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA). A UE may receive data transmissions on a plurality of downlink carriers, determine feedback information for the data transmissions, and send the feedback information on at least one uplink carrier using SC-FDMA.
Abstract:
Techniques for supporting multi-frequency range signal processing for a wireless device. In an aspect, a first antenna is provided to support first and third frequency ranges. A second antenna is separately provided to support a second frequency range, wherein the second is between the first and third frequency ranges. In other aspects, the second antenna can further support a fourth frequency range higher than the third frequency range. Other frequency range combinations, dual antenna aspects, and carrier aggregation features are further disclosed herein.
Abstract:
A method and system for transmitting electromagnetic signals are provided. Data signals including a first data signal conveying first data, a second data signal conveying second data, and a third data signal conveying third data are provided. One or more transmitting devices transmit the first data signal and an inverse of the first data signal in two orthogonal linear polarities of an antenna maintaining their inverted phase relationship as propagated. Transmitting devices also transmit the second data signal in a linear polarity with a 45 degree rotation around a transmit axis of the first data signal. Transmitting devices also transmit the third data signal in a linear polarity orthogonally from the second data signal and consequently +45 degrees from the first data signals. One or more receiving stations receive the transmitted first data signal, the inverse of the first data signal, the second data signal and the third data signal.
Abstract:
Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information may be sent on an uplink carrier that may or may not be paired with a downlink carrier on which data transmission is sent. A user equipment (UE) may receive data transmission on a downlink carrier among a plurality of downlink carriers. The UE may determine feedback information for the data transmission, determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and send the feedback information on the uplink carrier. In another aspect, feedback information for multiple downlink carriers may be sent on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA). A UE may receive data transmissions on a plurality of downlink carriers, determine feedback information for the data transmissions, and send the feedback information on at least one uplink carrier using SC-FDMA.
Abstract:
A multiplexing system enables communication between an array (2 and 6) of transducer elements (23, 24, 25 and 26; and 50, 53, 56 and 59) and a base unit (276) using a small number of wires (40; 70; and 176, 177, 178 and 179) or wireless channels. The transducer elements may be ultrasound transducer elements. For transmissions from the transducer elements to the base unit, one or more bimodal multiplexers (8; 35; 69 and 75; 172, 173, 174 and 175) are utilized. A "bimodal" multiplexer is one which provides two shifts, with one shift being in the relative timing of signals to enable "coherent summing" and the other shift being one that enables discrimination of signal energy generated by the different transducer elements. With respect to signaling generated at the base unit for controlling operations at the array, the number of connections is reduced by employing at least one transmit demultiplexer (232, 233, 234, 235, 236, 237 and 238) at the array for receiving a multi-element drive signal for sequencing the trans¬ ducer elements. The sequencing can be configured to achieve desired beam characteristics, such as beamforming.
Abstract:
A system for transporting radio frequency (RF) signals across an RF network comprises a central transport unit (30) and a remote transport unit (50). The frequencies of at least some of the RF signals to be transported may hop in accordance with predetermined hopping sequences. The central transport unit (30) uses the hopping sequences to convert the hopping frequencies into fixed frequencies for efficient transport through the RF network. The remote transport unit (50) uses the hopping sequences to convert the fixed frequencies back to the original hopping frequencies. The transport system is also capable of reverse operation in the direction from the remote transport unit (50) to the central transport unit (30).