[Problem] Providing a reception device and a communication system capable of preventing signal quality degradation and improving signal transmission efficiency in a case where a data signal is transmitted via a transmission line that connects a plurality of transmission devices and a reception device.

[Solution] Provided is a reception device including: a compensation circuit connected to a transmission line connected to each of a plurality of transmission devices and configured to compensate a signal transmitted from each of the transmission devices in time division; and an adjustment circuit configured to adjust operation of the compensation circuit, in which the adjustment circuit adjusts the operation of the compensation circuit by using a first adjustment value that adjusts the operation of the compensation circuit and is read from a recording medium storing the first adjustment value.

Apparatus and methods for signal booster systems with compensation for cable loss are provided herein. In certain configurations, a signal booster system includes two or more antennas for wirelessly communicating RF signals and a signal booster including booster circuitry for providing amplification to at least a portion of the RF signals. At least one of the antennas is connected to the signal booster via a cable. Additionally, the signal booster includes a cable loss compensation circuit that adjusts a gain of the booster circuitry to compensate for a loss of the cable.

Apparatus and methods for signal booster systems with compensation for cable loss are provided herein. In certain configurations, a signal booster system includes two or more antennas for wirelessly communicating RF signals and a signal booster including booster circuitry for providing amplification to at least a portion of the RF signals. At least one of the antennas is connected to the signal booster via a cable. Additionally, the signal booster includes a cable loss compensation circuit that adjusts a gain of the booster circuitry to compensate for a loss of the cable.

This application relates to a method, an apparatus, and a system of power line communication (PLC) for the internet of things (IoT). The method includes: A sending device receives a first request from a receiving device, where the first request requests to perform channel assessment in a first time window in a power line communication periodicity; in response to the first request, the sending device sends a sounding signal required for performing channel assessment to the receiving device; the sending device receives a modulation parameter from the receiving device, where the modulation parameter is determined by performing channel assessment based on the sounding signal; and the sending device performs data transmission with the receiving device in the first time window based on the modulation parameter.

This application relates to a method, an apparatus, and a system of power line communication (PLC) for the internet of things (IoT). The method includes: A sending device receives a first request from a receiving device, where the first request requests to perform channel assessment in a first time window in a power line communication periodicity; in response to the first request, the sending device sends a sounding signal required for performing channel assessment to the receiving device; the sending device receives a modulation parameter from the receiving device, where the modulation parameter is determined by performing channel assessment based on the sounding signal; and the sending device performs data transmission with the receiving device in the first time window based on the modulation parameter.

Disclosed in the present application are a pilot sending and receiving method and device, configured to reduce a delay of receiving pilot data at a terminal, thus improving efficiency of channel estimation based on the pilot data. The pilot sending method provided in the present application comprises: determining a pilot data pattern configured for a user equipment device, the pilot data pattern comprising time-frequency position information of pilot data, and the time-frequency position information comprising position information of an initial time point of the pilot data in a subframe; and sending to the user equipment device, according to the pilot data pattern, the pilot data.

Disclosed in the present application are a pilot sending and receiving method and device, configured to reduce a delay of receiving pilot data at a terminal, thus improving efficiency of channel estimation based on the pilot data. The pilot sending method provided in the present application comprises: determining a pilot data pattern configured for a user equipment device, the pilot data pattern comprising time-frequency position information of pilot data, and the time-frequency position information comprising position information of an initial time point of the pilot data in a subframe; and sending to the user equipment device, according to the pilot data pattern, the pilot data.

Methods and systems for modulating an amplifier power supply to efficiently attain amplified RF output power with much lower power dissipation than existing amplifiers.

Methods and systems for modulating an amplifier power supply to efficiently attain amplified RF output power with much lower power dissipation than existing amplifiers.

Apparatus and methods for signal booster systems with compensation for cable loss are provided herein. In certain configurations, a signal booster system includes two or more antennas for wirelessly communicating RF signals and a signal booster including booster circuitry for providing amplification to at least a portion of the RF signals. At least one of the antennas is connected to the signal booster via a cable. Additionally, the signal booster includes a cable loss compensation circuit that adjusts a gain of the booster circuitry to compensate for a loss of the cable.