摘要:
The invention relates to a repeater arrangement for amplifying a communication link between a base station and user equipment, wherein the communication link comprises an uplink and a downlink utilizing frequencies within a coherence bandwidth. The repeater arrangement comprises: a first antenna for communication with the base station; a second antenna for communication with the user equipment; an amplifying device operatively connected to the first antenna and to the second antenna for conveying and amplifying communication signals between the first antenna and the second antenna, the amplifying device comprising a first signal path for the uplink and a second signal path for the downlink, the first and second signal paths having equal electrical length, in order to affect said communication signal identically in both uplink and downlink, providing same phase and amplitude characteristics to said communication signal.
摘要:
An antenna arrangement comprising at least a first and a second elongated structure, e.g., a coaxial cable, for guiding an electromagnetic wave is provided. Each of said structures comprises a plurality of radiation elements. The structures are positioned alongside each other in their longitudinal direction of extension forming a bundle. The elongated structures are arranged within the bundle such that the radial positions of said structures are alternated in the longitudinal direction of extension.
摘要:
A functional, primary display means comprises a number of first, small pixel elements and comprises or communicates with image generating means for generation of a high resolution miniature image. A main display means comprises a dielectric material which is transparent to radio-, and/or millimeter waves and/or microwaves and comprises a number of second, passive, pixel elements substantially corresponding to, and considerably larger than, the first pixel elements. Each first pixel element is connected to a second pixel element by an optical transmission means for transfer of optical image information. The main display means is adapted to visually represent the transferred optical information as an enlarged image and receiving/transmitting means for communication of radio-, millimeter wave or microwave signals are arranged in or on the main display means such that reception/transmission can take place substantially independently of the optical representation.
摘要:
The invention relates to a repeater arrangement for amplifying a communication link between a base station and user equipment, wherein the communication link comprises an uplink and a downlink utilizing frequencies within a coherence bandwidth. The repeater arrangement comprises: a first antenna for communication with the base station; a second antenna for communication with the user equipment; an amplifying device operatively connected to the first antenna and to the second antenna for conveying and amplifying communication signals between the first antenna and the second antenna, the amplifying device comprising a first signal path for the uplink and a second signal path for the downlink, the first and second signal paths having equal electrical length, in order to affect said communication signal identically in both uplink and downlink, providing same phase and amplitude characteristics to said communication signal.
摘要:
The present invention relates to an antenna arrangement comprising a constant current electrical loop, which is arranged to provide a first essentially toroid-shaped radiation pattern, where the antenna arrangement further comprises a first and a second electrical dipole. The electrical dipoles are arranged essentially orthogonal to each other, and are arranged to provide a second and third essentially toroid-shaped radiation pattern which each is essentially orthogonal to the other and to the first essentially toroid-shaped radiation pattern. The constant current electrical loop comprises at least two current path parts, where a current can be applied to each one of the parts, so that the current in each one of the parts essentially will be in phase with each other.
摘要:
The present invention relates to a motion detector device comprising a receiver arranged for reception of at least one electromagnetic signal constituted by a corresponding transmitted electromagnetic signal being transmitted by a corresponding source and influenced by a corresponding channel. The motion detector device comprises predetermined information regarding each transmitted electromagnetic signal. The motion detector device further comprises analyzing means arranged to analyze all components of the received signal to determine how certain parameters of each transmitted electromagnetic signal are influenced by each corresponding channel by means of the predetermined information. The analyzing means is also arranged to analyze the temporal variation of said certain parameters during a certain time. It is determined if said temporal variation exceeds a predetermined threshold.The present invention also relates to a corresponding method.
摘要:
Throughput conditions limited by multiplicative noise may be improved by distributing a transmission power across MIMO data streams communicated between MIMO communication nodes. In particular, the transmission power is distributed based on knowledge at the transmitter of the MIMO channel to decrease the transmission power allocated to one or more of the data streams associated with a dominant signal path relative to the transmission power allocated to one or more data streams associated with a weaker signal path to increase at least one of a quality and a throughput condition of the MIMO channel.
摘要:
The method and apparatus disclosed herein improve throughput conditions limited by multiplicative noise by determining precoder weights for each data stream communicated between a MIMO transmitter node and a MIMO receiver node. The precoder weights are determined based on information derived from non-precoded reference symbols to decrease the energy allocated to the dominant signal path relative to the energy allocated to the non-dominant signal paths.
摘要:
An antenna (100,200,300, 400, 500) comprising first (110, 210, 310, 410, 430) and second (120, 220, 320, 420, 440) structures for guiding electromagnetic waves, each comprising groups (111, 130, 150, 230, 330; 140,160, 240, 340, 445, 470) of radiation elements. For adjacent sections in 5 the structures, at least one applies: ?Groups of radiation elements are distributed along the two structures such that a group (110, 130, 150) in the first structure overlaps a group (120, 140,160) in the second structure partially or not at all. ?Radiation elements within said groups (230; 240) exhibit a common 10 main direction of extension within the group, and differs between the first and the second groups by an angle of at least 10 degrees. ?The radiation elements of the groups (330, 340) are distributed along the structures (310, 320) on sides of the structures which face different directions.
摘要:
The present invention relates to a display arrangement comprising display means (304) and receiving and/or transmitting means for radio waves, millimeter waves or microwaves. An electrically conductive structure (6A) is adapted to form said receiving and/or transmitting means. The display means (3O4) comprises an emission layer with a number of light emitting elements or pixel elements (531, . . . , 535). The electrically conductive structure (6A) is provided between said light emitting elements (531, . . . , 535) to form said receiving and/or transmitting means such that they are integrated with the display means (3O4). Light conducting means (731, . . . , 735) are provided to conduct light through the electrically conductive structure (6A) to represent imaging information on top of the display means.