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174 results about "Fixed sequence" patented technology

A fixed-sequence robot is a robot that performs a single, preprogrammed task or set of tasks, making exactly the same movements each time. There is no exception or variation to the routine. Fixed-sequence robots are ideally suited to assembly-line work.

Generation method of preamble symbols and generation method of frequency-domain OFDM symbols

The invention discloses a generation method of frequency-domain OFDM symbols and a generation method of preamble symbols in physical frames. The generation method of the frequency-domain OFDM symbols includes the following steps that: the average power ratio of a fixed sequence and a signaling sequence is determined; fixed sequences and a signaling sequence set are respectively generated in the frequency domain according to the average power ratio R; one signaling sequence is selected from the signaling sequence set, and the fixed sequences and the signaling sequences fill effective sub carriers, odd-even staggered arrangement exists between the fixed sequences and the signaling sequences; two sides of the effective sub carriers are filled with zero-sequence sub carriers respectively to form a frequency domain OFDM symbol with a preset length; and the serial number of the selected signaling sequence in the set is the signaling information carried by OFDM symbols. With the generation methods provided by the technical scheme of the invention adopted, the problem of failure probability in low-complexity receiving algorithm detection on preamble symbols in a frequency selective fading channel in the current DVB_T2 standard and other standards can be solved.
Owner:SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION

Method and apparatus for forming layers of articles or multipacks

The invention relates to a method for forming palletizable layers (22, 28) of adjacent articles (16), multipacks (17) or the like at a layer-forming location using at least one program-controlled manipulator (20) for picking up one or more articles (16) or multipacks (17) at, and / or transferring them to, at least two spatially remote and / or spatially offset feeding stations and for positioning the articles (16) or multipacks (17), by rotation and / or displacement in predeterminable release positions at the layer-forming location, wherein, in dependence on a current supply situation of the articles (16) or multipacks (17) at the at least two feeding stations, the at least one manipulator (20) picks up the articles (16) or multipacks (17) selectively and without any fixed sequence, at the feeding stations and transfers them, with flexible adaptation of the respective transfer path, to the release position. The invention also relates to a corresponding apparatus for forming planar layers (22, 28) of articles (16) using a layer-forming location and at least one manipulator (20). The feeding stations are assigned sensor devices (52) which are intended for detecting the degree to which the feeding stations are occupied by conveyed articles (16) and which are coupled to a control device (54) for activating the at least one manipulator (20).
Owner:KRONES AG

Fixed-length time slot based dynamic channel allocation method for time division duplex/time division multiple access

ActiveCN103023822AImprove channel utilization efficiencyMeet granularityData switching networksDynamic channelCode division multiple access
The invention discloses a fixed-length time slot based dynamic channel allocation method for time division duplex/time division multiple access. The method mainly solves the problems of insufficient channel utilization rate or complexity of a scheduling algorithm and a planning frame, too high requirement on equipment and the like of an existing channel allocation method. The method includes the implementation steps: performing channel allocation once every a plurality of planning cycles by a central node, namely dividing the planning cycles into various fixed-length time slots; arranging the time slots according to the fixed sequence; dynamically determining a utilization method of each time slot, and presenting the utilization methods into a planning frame; enabling slave nodes to use various time slots according to stipulations of a previous planning frame; and enabling the central node to use various time slots according to stipulation of the previous planning frame. The fixed-length time slot based dynamic channel allocation method for time division duplex/time division multiple access is high in channel utilization rate, simple in scheduling algorithm and planning frame and low in requirement on equipment, and can be applied to the field of various local area networks and access networks adopting time division duplex/time division multiple access communication.
Owner:XIDIAN UNIV +3
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