Patent application number | Description | Published |
20090029663 | Frequency Source Synchronization And Redundancy - A system and method for ensuring proper synchronization of a plurality of frequency sources used in reception diversity-based radio reception. The frequency sources are concatenated in a synchronization loop, through which one frequency source having a high performance oscillator is configured as a master source. Through its oscillator, the master provides an internal synchronization signal that synchronizes all other sources, which have lower performance oscillators and are configured as slaves. Upon a failure in the master oscillator or in the synchronization loop, a slave source takes over as an alternative master source and provides its internal oscillator signal as an alternative synchronization signal to all other frequency sources. | 01-29-2009 |
20090154621 | MIMO-ADAPTED DISTRIBUTED ANTENNA SYSTEM - Methods and systems for carrying different signals required for MIMO communication using a single coaxial cable between two endpoints of a distributed antenna system (DAS) network. Original MIMO signals having the same frequency are frequency-separated at a first endpoint of the network. The frequency-separated signals are propagated together over the single coaxial cable and then reconstructed to their original frequency at a second endpoint of the network. | 06-18-2009 |
20100093391 | Multiple Data Services Over a Distributed Antenna System - The invention is directed to a method and system for supporting multiple time division duplexed (TDD) based wireless services or frequency division duplexed (FDD) wireless services on a Distributed Antenna System (DAS). A DAS can support a many wireless services, including voice and data services using the same physical equipment. TDD based services use a common clock signal to synchronize the components of the DAS for transmission and reception of TDD signals. In accordance with the invention, the DAS can include a GPS receiver which can extract a timing signal (such as a 1 pps signal) from a GPS signal and distribute the timing signal to any and all components of the DAS to enable synchronization of the components for transmitting and receiving TDD signals. The GPS receiver can be part of the interface that connects a TDD based service to the DAS or separate component of the DAS. In accordance with the invention, the DAS can distribute a reference clock signal to all of the components of the DAS in order to maintain zero frequency shift while manipulating with the carrier frequencies of the various wireless services carried by the DAS. In addition, and in accordance with the invention, two analog architectures for better integration between the services sources (BTS) and the DAS are disclosed. | 04-15-2010 |
20100099451 | Method and System for Real Time Control of an Active Antenna Over a Distributed Antenna System - The invention is directed to a method and system for supporting wireless medical telemetry services (MTS) on a Distributed Antenna System (DAS). A DAS can support a many wireless services, including voice and data services using the same physical equipment. WMTS systems can include one or more active antenna units which can be controlled by the MTS access point. The DAS can include one or more control channels for transferring the MTS control and status information between the MTS access point and the antenna. The control channels can be transferred over a separate cable. Alternatively, the control channel signals can be transferred using one or more intermediate frequency signal that is transferred over the existing cables of the DAS between the MTS access point and the antenna. The control channels can be used to configure and control and receive status from the managed components of the DAS including active antennae, control in real time the amplifiers used to process TDD signals, and control in real time the switching of the diversity antenna systems. The original frequency of the WMTS can be converted to an IF signal in order to be combined without interfering with the other services transferred over the DAS. The DAS can also carry a reference clock signal that can be used to synchronize the frequency conversion to and from an IF signal for transmission over the DAS without interfering with other signals. The reference clock signal can be used to control the operation of the antenna units, including controlling the operation of diversity antenna configurations and controlling antenna broadcast operations to reduce interference when two or more antenna units broadcast on the same frequency band at the same time. | 04-22-2010 |
20100291949 | EXTENDING OUTDOOR LOCATION BASED SERVICES AND APPLICATIONS INTO ENCLOSED AREAS - Methods and systems for indoor mobile unit positioning, for seamlessly toggling a mobile unit positioning between outdoor positioning and indoor positioning and for providing location based services or application generated by an external location server to the mobile unit while the mobile unit is indoors. The indoor mobile unit positioning includes mobile unit-based positioning which makes use of reception of access point signals by the mobile unit | 11-18-2010 |
20120236790 | METHOD AND SYSTEM FOR REAL TIME CONTROL OF AN ACTIVE ANTENNA OVER A DISTRIBUTED ANTENNA SYSTEM - A method and system suitable for supporting wireless medical telemetry services (WMTS) on a Distributed Antenna System (DAS). A DAS can provide wireless services including voice and data services using the same equipment. WMTS systems can include one or more active antenna units controlled by the MTS access point. The DAS includes control channels for transferring the MTS control and status information between the MTS access point and the antenna. The control channels can be transferred over a separate cable, or transferred using one or more intermediate frequency signals transferred over existing cables DAS between the MTS access point and the antenna. The control channels can be used to configure and control and receive status from the managed components of the DAS including active antennas, control the amplifiers used to process TDD signals, and control the switching of the diversity antenna systems. | 09-20-2012 |
20120281622 | MULTIPLE DATA SERVICES OVER A DISTRIBUTED ANTENNA SYSTEM - A system for supporting multiple time division duplexed (TDD) based wireless services or frequency division duplexed (FDD) wireless services on a Distributed Antenna System (DAS). TDD based services use a common clock signal to synchronize the components of the DAS for transmission and reception of TDD signals. The DAS includes a GPS receiver which extracts a timing signal from a GPS signal and distribute the timing signal to components of the DAS to enable synchronization of the components for transmitting and receiving TDD signals. The GPS receiver can be part of the interface that connects a TDD based service to the DAS. The DAS distributes a reference clock signal to the DAS components to maintain zero frequency shift while manipulating with the carrier frequencies of the various wireless services carried by the DAS. | 11-08-2012 |
20130058281 | METHOD AND SYSTEM FOR REAL TIME CONTROL OF AN ACTIVE ANTENNA OVER A DISTRIBUTED ANTENNA SYSTEM - A method and system suitable for supporting various wireless services on a Distributed Antenna System (DAS). The DAS can provide wireless services including voice and data services using the same equipment. The DAS can include one or more active antenna units controlled by an access point, and includes control channels for transferring control and status information between the access point and the antenna. The control channels can be transferred over a separate cable, or transferred using one or more intermediate frequency signals transferred over existing cables. The control channels can be used to configure and control and receive status from the managed components of the DAS including active antennas, control the amplifiers used to process TDD signals, and control the switching of diversity antenna systems. | 03-07-2013 |
20130295980 | DETERMINING NOISE LEVELS IN FREQUENCY BAND(S) IN DISTRIBUTED ANTENNA SYSTEMS AND ADJUSTING FREQUENCY BAND(S) OF COMMUNICATIONS SIGNALS IN RESPONSE, AND RELATED COMPONENTS, SYSTEMS, AND METHODS - Determining noise levels in frequency band(s) for communications paths in distributed antenna systems. Noise may be induced in communications paths in distributed antenna system as a result of electromagnetic interference from communications media located in close proximity and/or from other electronic devices. Noise induced on communications media may not be evenly distributed across the frequency spectrum, but instead concentrated in certain portions of the frequency spectrum. The frequency band(s) of communication signals distributed in the distributed antenna systems may be adjusted to be provided outside of frequency band(s) having unacceptable noise levels. In this manner, the communications performance (e.g., the signal-to-noise (S/N) ratio) of communications signals communicated in the distributed antenna systems may be improved. | 11-07-2013 |
20140064399 | DISTRIBUTED ANTENNA SYSTEM FOR MIMO TECHNOLOGIES - A method and system for supporting M1MO technologies which can require the transport of multiple spatial streams on a traditional Distributed Antenna System (DAS). According to the invention, at one end of the DAS, each spatial stream is shifted in frequency to a pre-assigned band (such as a band at a frequency lower than the native frequency) that does not overlap the band assigned to other spatial streams (or the band of any other services being carried by the DAS). Each of the spatial streams can be combined and transmitted as a combined signal over a common coaxial cable. At the other “end” of the DAS, the different streams are shifted back to their original (overlapping) frequencies but retain their individual “identities” by being radiated through physically separate antenna elements. | 03-06-2014 |
20140072071 | DISTRIBUTED ANTENNA SYSTEM FOR MIMO TECHNOLOGIES - A method and system for supporting MIMO technologies which can require the transport of multiple spatial streams on a traditional Distributed Antenna System (DAS). According to the invention, at one end of the DAS, each spatial stream is shifted in frequency to a pre-assigned band (such as a band at a frequency lower than the native frequency) that does not overlap the band assigned to other spatial streams (or the band of any other services being carried by the DAS). Each of the spatial streams can be combined and transmitted as a combined signal over a common coaxial cable. At the other “end” of the DAS, the different streams are shifted back to their original (overlapping) frequencies but retain their individual “identities” by being radiated through physically separate antenna elements. | 03-13-2014 |
20140135038 | EXTENDING OUTDOOR LOCATION BASED SERVICES AND APPLICATIONS INTO ENCLOSED AREAS - Methods and systems for indoor mobile unit positioning, for seamlessly toggling a mobile unit positioning between outdoor positioning and indoor positioning and for providing location based services or application generated by and external location server to the mobile unit while the mobile unit is indoors. The indoor mobile unit positioning includes mobile unit-based positioning with makes use of reception of access point signals by the mobile unit. | 05-15-2014 |
20140211875 | DISTRIBUTED ANTENNA SYSTEM FOR MIMO TECHNOLOGIES - The invention is directed to a method and system for supporting MIMO technologies which can require the transport of multiple spatial streams on a traditional Distributed Antenna System (DAS). According to the invention, at one end of the DAS, each spatial stream is shifted in frequency to a pre-assigned band (such as a band at a frequency lower than the native frequency) that does not overlap the band assigned to other spatial streams (or the band of any other services being carried by the DAS). Each of the spatial streams can be combined and transmitted as a combined signal over a common coaxial cable. At the other “end” of the DAS, the different streams are shifted back to their original (overlapping) frequencies but retain their individual “identities” by being radiated through physically separate antenna elements. | 07-31-2014 |
20140212144 | DISTRIBUTED ANTENNA SYSTEM FOR MIMO TECHNOLOGIES - The invention is directed to a method and system for supporting MIMO technologies which can require the transport of multiple spatial streams on a traditional Distributed Antenna System (DAS). According to the invention, at one end of the DAS, each spatial stream is shifted in frequency to a pre-assigned band (such as a band at a frequency lower than the native frequency) that does not overlap the band assigned to other spatial streams (or the band of any other services being carried by the DAS). Each of the spatial streams can be combined and transmitted as a combined signal over a common coaxial cable. At the other “end” of the DAS, the different streams are shifted back to their original (overlapping) frequencies but retain their individual “identities” by being radiated through physically separate antenna elements. | 07-31-2014 |
20140233442 | POWER MANAGEMENT IN DISTRIBUTED ANTENNA SYSTEMS (DASs), AND RELATED COMPONENTS, SYSTEMS, AND METHODS - Power management in a distributed communications system, such as a distributed antenna system (DAS), that includes determining user activity at remote units of the DAS. When user activity in one or more remote units falls below or above a specified threshold, power usage by the one or more remote units is reduced or increased accordingly. The power usage may reduced and/or increased by turning select remote units on or off, by increasing or reducing an operating voltage of one or more power amplifiers, and/or by turning select multiple-in, multiple-out (MIMO) front ends on or off. Power may be reduced such that wireless coverage within a specified area is maintained. | 08-21-2014 |
20140293894 | DISTRIBUTING DYNAMICALLY FREQUENCY-SHIFTED INTERMEDIATE FREQUENCY (IF) RADIO FREQUENCY (RF) COMMUNICATIONS SIGNALS IN DISTRIBUTED ANTENNA SYSTEMS (DASS), AND RELATED COMPONENTS, SYSTEMS, AND METHODS - Distributed antenna systems (DASs) distributing dynamically frequency-shifted intermediate frequency (IF) radio frequency (RF) communications signals are disclosed. In embodiments disclosed herein, a dynamic bandwidth control unit (DBCU) is configured to provide a plurality of IF RF communications signals for distribution over a communications medium to one or more remote units (RUs) in a DAS. The DBCU is configured to instruct a frequency conversion controller to shift a frequency of each of a plurality of RF communications signals to non-overlapping intermediate frequencies. For at least one of the plurality of RF communications signals, the shifted, intermediate frequency is dynamically selected by the DBCU based on the frequency of at least one other RF communications signals. In this manner, the frequencies of the RF communications signals may be shifted to dynamically selected IFs in order to optimize available bandwidth of the communications medium in the DAS. | 10-02-2014 |
20150038185 | RADIO-FREQUENCY INTEGRATED CIRCUIT (RFIC) CHIP(S) FOR PROVIDING DISTRIBUTED ANTENNA SYSTEM FUNCTIONALITIES, AND RELATED COMPONENTS, SYSTEMS, AND METHODS - Radio-frequency (RF) integrated circuit (RFIC) chip(s) allow for the integration of multiple electronic circuits on a chip to provide distributed antenna system functionalities. RFIC chips are employed in central unit and remote unit components, reducing component cost and size, increasing performance and reliability, while reducing power consumption. The components are also easier to manufacture. The RFIC chip(s) can be employed in distributed antenna systems and components that support RF communications services and/or digital data services. | 02-05-2015 |