A distributed antenna system (DAS) includes host that receives downstream signals corresponding to radio frequency (RF) channel and remote antenna units (RAUs) communicatively coupled to host. Host communicates downstream transport signal derived from downstream signals received at host to RAUs. Each RAU uses downstream transport signal to generate downstream RF signal for radiation from antenna associated with RAU. Downstream RF signal comprises a subset of plurality of downstream frequency bands. Each RAU receives upstream RF signal including respective RF channel. Each RAU communicates upstream transport signal derived from upstream RF signal to host. Host uses upstream transport signal to generate upstream signal including at least one upstream frequency band. Host analyzes attribute of downstream and upstream transport signals associated with RAUs, correlates analyzed attribute for each RAU with profile, and determines current capacity usage of RAUs based on correlation. Host dynamically allocates capacity amongst RAUs based on current capacity usage.

Distributed antenna system with dynamic capacity allocation and power adjustment

The present application discloses a method for transmitting, at a transmitting end, a signal to a receiving end in a wireless communication system. Specifically, the method for transmitting a signal comprises the steps of: receiving preferred beam identifier information from a representative receiving end of a plurality of receiving ends comprising the receiving end; configuring, on the basis of the preferred beam identifier information, a first precoder for aiming the direction of the signal in a first beam direction and a second precoder for aiming the direction of the signal in the direction of the receiving end with respect to the first beam direction; and transmitting the signal to the receiving end using a hybrid beamformer comprised of the first precoder and the second precoder.

Method for user cooperation-based beam scanning for hybrid beamforming in wireless communication system, and apparatus therefor

The invention discloses a hybrid precoding processing method and related equipment, which are suitable for base station equipment of a millimeter wave large-scale MIMO system, the millimeter wave large-scale MIMO system comprises the base station equipment and terminal equipment, the millimeter wave large-scale MIMO system comprises K user terminals, and the number of transmitted data streams is Ns. The method comprises the following steps: obtaining KNs data streams to be transmitted; And performing digital pre-coding processing on the KNs data streams based on the baseband digital pre-codingmatrix to obtain KNs digital pre-coding data streams. Performing analog precoding on the KNs digital precoding data streams based on an analog precoding matrix, and obtaining a transmission signal transmitted to each user terminal. According to the embodiment of the invention, the universal sub-array architecture is utilized to carry out data flow to be transmitted at the base station equipment.According to the invention, the universal sub-array architecture is utilized to carry out data flow transmission on the base station equipment; and analog pre-coding and digital pre-coding are carriedout, so that the number of hardware and the number of iterations of hybrid coding can be reduced, and the hardware cost and the power consumption are effectively reduced.

hybrid precoding processing method and related equipment

The present invention relates to a pattern/polarization antenna device and a method to form a beam by using the same According to an embodiment of the present invention, the pattern/polarization antenna device comprises radial patterns to use a spherical vector wave mode in which two kinds of unit antennas have at least N degrees A distance between the unit antennas is placed below a half-wave length The unit antenna includes: an electric field antenna, having radial patterns distributed in an even mode among the spherical vector wave modes; and a magnetic field antenna having radial patterns distributed in an odd mode among the spherical vector wave modes The electric field antenna and the magnetic field antenna are integrated to face different directions Since an N port pattern/polarization antenna uses N spherical vector wave modes beyond the use of only two spherical vector wave modes, a pattern/polarization gain is improved, as compared to existing technology

Beamforming method using pattern/polarization antenna

Provided herein is a backpack-type mobile base station system based on a TVWS and satellite backhaul, including a mobile base station configured to wirelessly perform matching with any one of a backhaul donor and a backhaul bridge through a TVWS, and provide an emergency disaster mobile communication service to a terminal. The mobile base station may include: a backhaul wireless matching unit configured to wirelessly perform matching with any one of the backhaul donor and the backhaul bridge through the TVWS; a terminal wireless matching unit configured to wirelessly perform matching with the terminal; and a base station signal processing unit configured to process a signal of the mobile base station between the backhaul wireless matching unit and the terminal wireless matching unit. The backhaul donor, the backhaul bridge and the mobile base station may receive power from any one of a commercial power supply, a battery, sunlight, wind power, and a power generator.

Backpack-type mobile base station system and method based on tvws and satellite backhaul

The present invention discloses a communication device based on the beam-space MIMO and an operation method thereof. According to an embodiment of the present invention, the communication device includes: a beam space MIMO antenna which includes a dynamic antenna and multiple parasitic antennas mutually coupled to the dynamic antenna; a beam-space MIMI baseband circuit which uses a signal to generate load impedance vectors for the parasitic antennas in a time area transmitted from a modem circuit; and a beam space MIMO RF circuit which loads load impedance values respectively corresponding to the parasite antennas based on the load impedance vector onto the parasite antennas.

Communication device based on beamspace mimo, and method thereof

A beamforming device for a communication system using a multi-antenna is disclosed. The present invention can implement a beamforming device combing digital and analog methods by including a plurality of phase controllers corresponding to each of the plurality of D/A converters or A/D converters instead of having a plurality of D/A converters or A/D converters less than the number of antennae. Therefore, the plurality of D/A converters or A/D converts are made to correspond to multiple data streams, and the size and manufacturing costs can be reduced by decreasing the number of D/A converters or A/D converters. [Reference numerals] (100) Transmission control unit; (210,220,230) Weighted factor controller

Beamforming apparatus for communication system using multi-antenna

Disclosed are a method for managing wireless backhaul resource in mobile communication system utilizing distributed small base station and a mobile communication system using it. According to the present invention, at least one macro base station of a mobile communication system receives information for allocating resource collected during a predetermined period and allocating wireless backhaul resource capacities for each of a plurality of dispersed small base stations through antenna grouping and beam power allocation based on the received information. Thus, resources of a capacity needed for each of the plurality of dispersed small base stations can be allocated. Also, the dispersed small base station can request additional wireless backhaul resource to a macro base station when the traffic is dramatic increased, even during the information collecting period, to receive additional resource allocation. Thus, by effectively using limited wireless backhaul resource between a macro station and a dispersed small base station, a fine mobile communication service can to provide for a mobile communication terminal.

Method for managing wireless backhaul resource in mobile communication system utilizing distributed small base station and mobile communication system using it

The present invention discloses a mixed beam forming method and devices executing the same. According to an embodiment of the present invention, the mixed beam forming method used in the communication device includes the steps of: obtaining statistic channel relationship matrices for the channels between an array antenna of the communication device and respective terminal devices; determining an RF beam forming coefficient corresponding to each of the terminal devices based on the statistic channel relationship matrices; and executing an RF beam forming operation with the symbol streams to be transmitted to the respective terminal devices based on the RF beam forming coefficients.

Method for hybrid beamforming on statistical channel informaion, and apparatuses performing the same

Disclosed are a mixed beamforming method and apparatuses performing the same. A mixed beamforming method of a communication device according to an embodiment may comprise the steps of: obtaining statistical channel correlation matrixes for a channel between a array antenna of the communication device and each terminal device; determining an RF beamforming coefficient corresponding to the each terminal device on the basis of the statistical channel correlation matrixes; and performing an RF beamforming for symbol streams to be transmitted to the each terminal device on the basis of the RF beamforming coefficient.

Yim Han Young

Papers

Communication device based on beamspace mimo, and method thereof

Beamforming apparatus for communication system using multi-antenna

Method for managing wireless backhaul resource in mobile communication system utilizing distributed small base station and mobile communication system using it

Method for hybrid beamforming on statistical channel informaion, and apparatuses performing the same

Statistical channel information-based mixed beamforming method and apparatuses performing same