公开(公告)号：US10063308B2

公开(公告)日：2018-08-28

申请号：US15804240

申请日：2017-11-06

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04B1/04 ,  H04B7/14 ,  H03F3/24 ,  H04B7/155 ,  H04W72/04 ,  H04B1/525

CPC classification number: H04B7/14 ,  H03F1/3223 ,  H03F3/24 ,  H03F2200/111 ,  H03F2200/408 ,  H04B1/04 ,  H04B1/525 ,  H04B7/155 ,  H04B2001/0408 ,  H04W72/0453

Abstract: A radio frequency transmitter device, constituted for transmitting a radio frequency signal in a frequency band comprising at least one transmit subband and at least one receive subband, comprises: a transmit chain for processing a transmit signal associated with the at least one transmit subband; a power amplifier for amplifying the transmit signal; an output port for transmitting the amplified transmit signal; a processing unit for calculating, from the transmit signal associated with the at least one transmit subband, a correction signal in the at least one receive subband making use of a power amplifier model modelling the behavior of the power amplifier; and a coupler for adding the correction signal to the amplified transmit signal for cancelling intermodulation products in the amplified transmit signal produced by the power amplifier.

公开(公告)号：US10063294B2

公开(公告)日：2018-08-28

申请号：US15118581

申请日：2015-01-30

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04B7/024 ,  H04B7/0456 ,  H04W88/08

CPC classification number: H04B7/0456 ,  H04B7/022 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0639 ,  H04W88/085

Abstract: Certain aspects involve a spatial separation sub-system for a distributed antenna system (“DAS”). The spatial separation sub-system can include input ports that are communicatively connectable to a base station, output ports that are communicatively connectable to remote antenna units of the DAS, and RF circuitry that communicatively connects the input ports and the output ports. The spatial separation sub-system can receive at least two downlink signals via at least two of the input ports. A phase difference between the downlink signals can correspond to a codebook index used to encode the downlink signals for multiple-input/multiple-output (“MIMO”) transmission. The RF circuitry can provide a combined signal power from the downlink signals to one of the output ports based on the phase difference between the downlink signals.

公开(公告)号：US09722675B2

公开(公告)日：2017-08-01

申请号：US14655606

申请日：2015-03-05

Applicant: COMMSCOPE TECHNOLOGIES LLC

Inventor： Keld Knut Lange

IPC: H04B7/08 ,  H04B7/155 ,  H04B7/022

CPC classification number: H04B7/022 ,  H04B1/1027 ,  H04B7/0868 ,  H04B7/155 ,  H04B7/15507 ,  H04W88/085

Abstract: A multistage combining sub-system for a distributed antenna system (“DAS”) is disclosed. The combining sub-system can receive broadband uplink signals from remote units of the DAS. The sub-system can divide the received broadband uplink signals into sets of narrowband uplink signals. The combining sub-system can select subsets of narrowband uplink signals from the sets of narrowband uplink signals. The subsets can be selected based on the narrowband signals in the subsets having signal powers above a threshold signal power. The combining sub-system can combine the selected subsets of narrowband uplink signals for routing to a base station. Combining the selected subsets of narrowband uplink signals can involve excluding narrowband uplink signals that are not included in the selected subsets of narrowband uplink signals.

公开(公告)号：US09680556B2

公开(公告)日：2017-06-13

申请号：US14540375

申请日：2014-11-13

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04B7/155

CPC classification number: H04B7/15507 ,  H04B7/155

Abstract: Certain aspects involve narrowband signal transport sub-systems for a distributed antenna system (“DAS”). The narrowband signal transport sub-system includes one or more filter banks that are communicatively coupled to a port of a unit in the DAS. The input port can receive a broadband downlink signal that includes multiple carriers. Each filter bank can generate a set of narrowband downlink signals corresponding to a carrier from the broadband downlink signal. Each filter bank can include demodulators and filters. The demodulators can generate respective frequency-shifted downlink signals from the carrier. Each frequency-shifted downlink signal can have a respective frequency shift from the carrier's frequency that is based on a respective bandwidth for the carrier. Each filter can have a passband corresponding to the bandwidth of a narrowband channel associated with the carrier and can generate one of the narrowband downlink signals by filtering a respective one of the frequency-shifted downlink signals.

公开(公告)号：US20170041936A1

公开(公告)日：2017-02-09

申请号：US15304047

申请日：2015-04-14

Applicant: CommScope Technologies LLC

Inventor： Luigi Tarlazzi ,  Keld Knut Lange

IPC: H04W72/04 ,  H04W24/08

CPC classification number: H04W72/0486 ,  H04B17/318 ,  H04W24/08 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/048

Abstract: A traffic load can be determined in a telecommunications system using narrowband signal monitoring. Narrowband signals can be generated from a wideband uplink signal. A resource utilization profile can be estimated for a remote unit based on measured power profiles associated with the narrowband signals. Traffic load can be determined based on the resource utilization profile.

Abstract translation: 可以在使用窄带信号监测的电信系统中确定业务负载。 可以从宽带上行链路信号生成窄带信号。 可以基于与窄带信号相关联的测量功率分布来为远程单元估计资源利用率曲线。 流量负载可以根据资源使用情况确定。

公开(公告)号：US20200382199A1

公开(公告)日：2020-12-03

申请号：US16995519

申请日：2020-08-17

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04B7/155 ,  H04W56/00

Abstract: A digital multichannel interface for a first unit of a radio distribution system, the digital multichannel interface comprising a first uplink interface and a first downlink interface. The first uplink interface is configured to receive uplink transmit frames from a second unit of the radio distribution system, the uplink transmit frames including frame timing information, the radio distribution system including a plurality of remote units communicatively coupled to at least one of the first unit or the second unit. The first downlink interface is configured to: generate a plurality of reformatted wideband downlink I/Q data streams based on the frame timing information extracted from the uplink transmit frames received from the second unit; generate downlink transmit frames including the plurality of reformatted wideband downlink I/Q data streams; and provide the downlink transmit frames to the second unit.

公开(公告)号：US10554290B2

公开(公告)日：2020-02-04

申请号：US15302334

申请日：2015-04-07

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange ,  Luigi Tarlazzi

IPC: H04B7/155 ,  H04J3/08

Abstract: A digital repeater system for repeating RF signals comprises: a receiving section for receiving an RF input signal, the RF input signal comprising at least one frequency band including a multiplicity of subbands associated with a multiplicity of communication channels; and at least one transmitting section for transmitting the RF output signal. The receiving section is constituted to digitize the RF input signal to obtain a digital input signal and to isolate, within the digital input signal, the multiplicity of subbands from each other to obtain a multiplicity of digital subband signals. The at least one transmitting section is constituted to combine the digital subband signals to obtain a digital output signal and to convert the digital output signal to an RF output signal. In addition, the receiving section comprises a power profile estimation unit for determining a power estimate for each digital subband signal associated with the multiplicity of subbands and a muting device for muting a digital subband signal of a particular subband based on the power estimate. In this way a digital repeater system for repeating RF signals is provided which allows for a detection of unused portions of a frequency band in order to improve the performance of the overall system.

公开(公告)号：US10355769B2

公开(公告)日：2019-07-16

申请号：US15620307

申请日：2017-06-12

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04W88/08 ,  H04B7/155

Abstract: A circuit for use within a distributed antenna system includes: demodulators configured to generate respective frequency-shifted downlink signals from a carrier of a plurality of carriers included within a broadband downlink signal received at the circuit, each of the frequency-shifted downlink signals having a respective frequency shift from a frequency of the carrier, wherein the respective frequency shift is based on a bandwidth of a narrowband channel associated with the carrier, and filters communicatively coupled to the demodulators and configured to output a set of narrowband downlink signals, wherein each of the filters has a passband corresponding to the bandwidth of the carrier and is configured to generate a respective narrowband downlink signal of the set of narrowband downlink signals by filtering a respective one of the frequency-shifted downlink signals.

公开(公告)号：US20180026704A1

公开(公告)日：2018-01-25

申请号：US15679247

申请日：2017-08-17

Applicant: CommScope Technologies LLC

Inventor： Keld Knut Lange

IPC: H04B7/155 ,  H04L25/03 ,  H04W88/08

CPC classification number: H04B7/15585 ,  H04B1/525 ,  H04L25/03012 ,  H04L25/03082 ,  H04L2025/03496 ,  H04W88/085

Abstract: Certain features relate to a remote antenna unit having a multi-stage isolation sub-system for isolating uplink and downlink signal paths. A multi-stage isolation sub-system in the remote antenna unit can include a first stage device that is configured to generate a cancellation signal for canceling unwanted downlink signals received at the uplink antenna. The isolation sub-system can also include a second stage device configured to generate a cancellation signal that attenuates residual noise and intermodulation products generated in the downlink path and received in the uplink path. The multi-stage isolation sub-system can combine the cancellation signals with signals received on the uplink path in order to cancel or attenuate downlink leakage signals and residual noise present on the uplink path.

公开(公告)号：US09860863B2

公开(公告)日：2018-01-02

申请号：US14717642

申请日：2015-05-20

Applicant: COMMSCOPE TECHNOLOGIES LLC

Inventor： Keld Knut Lange

IPC: H04W56/00

CPC classification number: H04W56/004 ,  H04B10/00 ,  H04J3/0647 ,  H04J3/0682

Abstract: Certain features relate to compensating for a roundtrip delay caused by a distributed antenna system. A delay unit communicatively coupled to a base station can intercept the delay compensation signaling communicated between the digital baseband unit of the base station and the radio transmitter unit of the base station. The delay unit can adjust the delay compensation signaling by adding to the delay compensation signaling the pre-determined fiber delay caused by the DAS. In some aspects, the delay unit can delay the control words for a base station operating under the Common Public Radio Interface standard. In other aspects, the delay unit can delay the roundtrip time measurement message for a base station operating under the Open Base Station Architecture Initiative standard.