摘要:
A method for performing multi-user joint-detection in a neighboring cell in a TDD-CDMA system presets slot types and includes: a network device configuring a slot type of each uplink slot in its administrated cells and a base station of each cell obtaining a slot type of each uplink slot in a neighboring cell from the network device; the network device configuring for each user a slot for transmitting uplink data and a midamble and channelization code to be used according to the slot type of each uplink slot and a service type of each user in each cell; each user in each cell using the configured midamble and channelization code to transmit uplink data in the configured slot; and the base station detecting activated code channels in the neighboring cell according to the received uplink data transmitted by users in the neighboring cell and obtaining midamble used by each user in the neighboring cell according to the channeliazation codes of the activated code channels and according to the slot type of each uplink slot in the neighboring cell so that the base station may perform the multi-user joint-detection in the neighboring cell.
摘要:
A method for performing multi-user joint-detection in a neighboring cell in a TDD-CDMA system presets slot types and includes: a network device configuring a slot type of each uplink slot in its administrated cells and a base station of each cell obtaining a slot type of each uplink slot in a neighboring cell from the network device; the network device configuring for each user a slot for transmitting uplink data and a midamble and channelization code to be used according to the slot type of each uplink slot and a service type of each user in each cell; each user in each cell using the configured midamble and channelization code to transmit uplink data in the configured slot; and the base station detecting activated code channels in the neighboring cell according to the received uplink data transmitted by users in the neighboring cell and obtaining midamble used by each user in the neighboring cell according to the channeliazation codes of the activated code channels and according to the slot type of each uplink slot in the neighboring cell so that the base station may perform the multi-user joint-detection in the neighboring cell.
摘要:
A distribution method of multi basic midamble includes following step A. determining the number of channelizing code of a cell or sector (s101); B. configuring more than one of basic midamble to the cell or sector (s102); C. generating midamble which is no less than said channelizing code using said more than one of basic midamble (s103); D. configuring said midamble to make each channelizing code correspond to different midamble respectively (s104). The invention can configure multi basic midamble code in a cell or sector to make midamble correspond to all of adoptable spread spectrum code one-to-one, can improve the accuracy of joint detection remarkably and efficiently, and can change the service speed more securely. Furthermore, acquiring channelizing impulse response and corresponding spread spectrum code using the exact corresponding of midamble and spread spectrum code can acquire user original signal exactly. The invention also includes a joint detection method.
摘要:
A tracer composite comprises a tracer disposed in a metal-based carrier which comprises: a cellular nanomatrix and a metal matrix disposed in the cellular nanomatrix, wherein the tracer is detectable at a range of from about 1 ppt to about 1,000 ppm.
摘要:
Method for multi-parameter inversion using elastic inversion. This method decomposes data into offset/angle groups and performs inversion on them in sequential order. This method can significantly speed up convergence of the iterative inversion process, and is therefore most advantageous when used for full waveform inversion (FWI). The present inventive approach draws upon relationships between reflection energy and reflection angle, or equivalently, offset dependence in elastic FWI. The invention uses recognition that the amplitudes of small angle (near offset) reflections are largely determined by acoustic impedance alone (1), independent for the most part of Vp/Vs. Large angle (middle and far offset) reflections are affected by Ip, Vp/Vs (2) and other earth parameters such as density (3) and anisotropy. Therefore, the present inventive method decomposes data into angle or offset groups in performing multi-parameter FWI to reduce crosstalk between the different model parameters being determined in the inversion.
摘要:
A lithium ion battery electrode includes an electrode material layer. The lithium ion battery electrode further includes a current collector. The current collector is located on a surface of the electrode material layer. The current collector is a carbon nanotube layer. The carbon nanotube layer consists of a number of carbon nanotubes.
摘要:
A downhole communications arrangement including one or more electromagnetic (EM) devices; and a shield disposed relative to the one or more devices. The shield preventing or reducing passage of one or more EM frequencies and being alterable by one or more selected conditions to allow passage of the one or more frequencies. A method for communicating in a downhole environment.
摘要:
A metal composite comprises: a matrix comprising periodic metal springs; and a filler material comprising one or more of the following: a carbon composite; a polymer; a metal; graphite; cotton; asbestos; or glass fiber; wherein the filler material is bounded to the matrix via one or more of the following: a mechanical interlocking; a chemical bond; a solid solution; or an active layer disposed between the periodic metal springs and the filler material.
摘要:
A system, method and apparatus for controlling a downhole operation is disclosed. A tool is operated to perform the downhole operation at a selected downhole location using a first value of an operation parameter of the tool. A magnetostrictive position sensor is used to determine a relative position along a section of a wellbore related to the operation being performed using the first value of the operation parameter. The determined relative position is compared to a selected threshold. The operation parameter is altered to a second value based on the comparison of the relative position to the selected threshold.
摘要:
The invention provides compounds, compositions, and methods for studying the Rohmer pathway and for treating bacterial infections or parasitic infections. The parasitic infection can be a protozoan infection, such as malaria. The compounds and compositions can also be used as antibiotics, for example, to kill bacteria or parasites, or to inhibit bacterial or parasite growth. The invention further provides inhibitors of isoprenoid biosynthesis enzymes, and methods of inhibiting the activity of isoprenoid biosynthesis enzymes. The compounds can be, for example, alkynes or allenes that bind to a unique Fe of an Fe4S4 cluster of an isoprenoid biosynthesis enzyme.