摘要:
A high capacity communication system and method, and a high capacity communications configuration system are provided. The high capacity communication system includes a transmitter. The transmitter includes a signal generator to generate a signal including, wherein for a first frame portion extending from zero to τ time the signal is generated per a first color reuse plan of a frequency spectrum and one or more polarizations, and for a second frame portion extending from τ to T the signal is generated per a second color reuse plan of the frequency spectrum and the one or more polarizations; and an RF system to beam the signal concurrently to a first geographic area and a second geographic area. In the high capacity communication system, τ is less than T, the first frame portion is intended for a first VSAT population disposed in the first geographic coverage area and the second frame portion is intended for a second VSAT population disposed in the second geographic coverage area, and the first color reuse plan maps the frequency spectrum and the one or more polarizations into fewer colors than the second color reuse plan.
摘要:
A user terminal (UT) to transmit small amounts of data, the UT including: a packet including the data, where the packet is less than 128 bytes; a frequency synchronizer to synchronize a transmission frequency of an ASCMA return link connecting the UT with a satellite gateway; and an ASCMA transmitter to transmit, without acquiring timing synchronization with the satellite gateway from the UT, the packet modulated over the synchronized transmission frequency as an ASCMA waveform including a preamble to indicate a start of a transmission. Other embodiments of this aspect include corresponding computer systems, apparatus, and computer programs recorded on one or more computer storage devices, each configured to perform the actions of the methods.
摘要:
A geolocation is estimated by tessellating a coverage area into a camping cell and adjacent cells; subdividing the camping cell into grid points where each grid point of the grid points has an associated relative offset from a camping beam center; illuminating, with a platform, the camping cell with a camping beam and each of the adjacent cells with adjacent beams; receiving a camping beam signal strength and adjacent beams signal strengths for each grid point of the grid points; profiling, at each grid point, ratios of the camping beam signal strength to each one of the adjacent beams signal strengths; mapping the ratios and the associated relative offset of each grid point; and estimating a relative geolocation of a User Terminal (UT) from the camping beam center based on a UT camping beam signal strength and UT adjacent beams signal strengths.
摘要:
A system and method for data transmissions in a wireless communications system, which accommodates for a periodic blockage of the transmission signal, is provided. A data stream is segmented into packets of a predetermined fixed-size for a burst-mode transmission over a channel of the communications system, wherein the transmission is subject to a periodic blockage. A forward error correction outer code is then applied to the packets of the data stream for recovery of packets subjected to the periodic blockage, and a unique word is added to each packet for acquisition of frequency, carrier phase and symbol timing of the respective packet. The packets of the data stream are interleaved based on an interleaver of a depth based at least in part on a ratio of a blockage free duration between two consecutive blockages of the periodic blockage to a duration of each blockage of the periodic blockage.
摘要:
A system and method for data transmissions in a wireless communications system, which accommodates for a periodic blockage of the transmission signal, is provided. A data stream is segmented into packets of a predetermined fixed-size for a burst-mode transmission over a channel of the communications system, wherein the transmission is subject to a periodic blockage. A forward error correction outer code is then applied to the packets of the data stream for recovery of packets subjected to the periodic blockage, and a unique word is added to each packet for acquisition of frequency, carrier phase and symbol timing of the respective packet. The packets of the data stream are interleaved based on an interleaver of a depth based at least in part on a ratio of a blockage free duration between two consecutive blockages of the periodic blockage to a duration of each blockage of the periodic blockage.
摘要:
A transport roller for transporting articles comprises a spindle (3) and a coil (5) on the spindle (3). The coil (5) comprises a flexible central section (17), and a first end section (13) and a second end section (15) that are affixed at two opposite sides of the flexible central section (17) to the spindle (3).
摘要:
A method for electrochemically depositing a metal electrode of a solar cell, comprising the steps of: making the surface of the solar cell having a cathode contact with an electrolyte solution, connecting an anode of the solar cell and a solid metal, illuminating the main light-receiving surface of the solar cell, wherein metal ions in the electrolyte solution accept electrons formed on the cathode surface of the solar cell so that a metal is formed and deposited on the cathode surface of the solar cell, meanwhile, the solid metal provides electrons to the anode of the solar cell so that the metal ions are formed and dissolved in the electrolyte solution. By using this method, a problem of a decreased cell efficiency due to a short circuit caused by the deposition of metal on the anode will be solved, meanwhile, a possibility of damaging the solar cell and depositing metal unevenly as a result of using any kind of plating fixtures is avoided, the electrochemical reaction rate is effectively controlled, an evenness of the deposition of metal is guaranteed, and the manufacture of a solar cell having a selective diffusion structure is promoted.
摘要:
A baud rate acquisition circuit (10) for synchronizing a sampling signal with an input signal operates in broad rate sweeping and a rate fine tuning phases. In the rate sweeping phase, a timing error detector (24) examines the sampling signal generated by a decimator (16). If the sampling signal is outside a rate acquisition range from the target rate, a rate sweeping algorithm selects a new sampling rate. In response to the sampling rate within the rate acquisition range, the timing error detector (24) examines the asymmetry thereof to generate a rate correction signal to synchronize the sampling signal with the input signal. Next in the rate fine tuning phase, a multiplexer (22) routes the sampling signal through a square root filter (18). By examining the waveform shaped signal, the time error detector (24) synchronizes the sampling signal with the input signal with high accuracy.
摘要:
The present invention PCM (phone computing machine) uses general purpose programmable device (101) as its core. Line-end interface (201), includes RJ11 jack (210), DAA (212) and CODEC (214), connects to telephone line. User-end interface (301), in one embodiment includes RJ11 jack (310), SLIC (312) and CODEC (314) connects to user apparatus/networks/systems. The functionality of PCM is defined when a portable data storage device with application software is plugged in the machine's external memory interface (401). PCM's great flexibility and low cost will open up new frontier in the telephone system. In addition, a general method similar as PCM can be applied to other cost-effective information processing applications between predetermined information sources. Examples are voice application in microphone system, audio/video processing in home entertain systems.
摘要:
The invention relates to a method and terminal equipment for planting vegetables on internet rental land, thereby enabling land lessees with idle land to cooperate with urban people seeking to eat green vegetables which are economical and practical, on the one hand, meeting the requirement that urban people eat green vegetables which are practical and reliable, on the other hand, enabling idle land to be reasonably utilized, especially wasting land in rural areas, and bringing considerable benefits to the land lessees; meanwhile, along with the popularization and application of the method and the terminal equipment, a large number of employment posts can be brought to rural areas, and the economic development of the rural areas can be promoted.