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Communications system using adaptive frequency notching

A communication system and communication signal technology, applied in the field of communication systems, can solve problems such as interference with broadcast signal reception

Active Publication Date: 2014-11-12
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Communications and power line wiring adapted to receive broadcast signals and transmit signals on the same frequency band may interfere with reception of broadcast signals at radio receivers

Method used

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  • Communications system using adaptive frequency notching
  • Communications system using adaptive frequency notching
  • Communications system using adaptive frequency notching

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Figure 1A A communication system 100 is shown. The communication system 100 may be a wireless or wired communication system, eg xDSL (Universal Digital Subscriber Line) or DVB-C2 (Digital Video Broadcasting-Cable). According to one embodiment, the communication system is based on an OFDM (Orthogonal Frequency Division Multiplexing) modulation scheme. According to another embodiment, the communication system 100 is a system for performing data communication using power distribution wires. For example, communication system 100 is power line communication (PLC), mains communication, power line telecommunications (PLT), broadband power line (BPL) or powerband or power line networking (PLN) utilizing a modulated carrier superimposed onto a power line of 50 Hz or 60 Hz alternating current, respectively. ). The transmission line 105 represents a transmission channel between two communication devices of the wired communication system. The communication device can be a sende...

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Abstract

A communications system includes a receiver unit connected with a transmission channel. The receiver unit determines a signal power of a first communications signal received over the transmission channel. A transmitter unit is connected with the transmission channel and transmits a second communications signal, wherein a gain of the communications signal being output by the transmitter unit is controllable. A control unit controls the gain of the transmitter unit in response to the determined signal power. At the receiver unit, detection of broadcast signal ingress during data communication is improved and methods for avoiding disturbances between coexisting communications systems may become more reliable. Different distances between successive training symbols suitable for channel estimation may be provided to enhance the noise measurement.

Description

technical field [0001] Embodiments of the invention relate to communication systems utilizing adaptive frequency notching, and to adaptation of transmit power for assisting noise measurements during communication. Further embodiments relate to an arrangement of a communication system utilizing adaptive frequency notching and adaptive transmit power management and a method for operating a communication system utilizing adaptive frequency notching and adaptive transmit power management for noise measurements during communication . Background technique [0002] PLT (Power Line Telecommunications) in the prior art may lead to coexistence limitations with broadcasting services. Publication ETSI TS 105 578; Power Line Telecommunications; "Coexistence between PLT modems and short wave radio broadcasting services"; ETSI2008 describes an adaptive frequency notching technique which, on the one hand, has a significant impact on data throughput and QoS (Quality of Service ) requires m...

Claims

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Application Information

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IPC IPC(8): H04B3/54
CPCH04L5/0051H04L27/2605H04L5/0048H04L27/2626H04L25/0226H04L25/03828H04B3/54H04L27/3411H04L25/0204H04L5/0023H04B2203/5425H04B17/29H04B15/005H04L27/26265
Inventor 安德里亚斯·斯楚瓦格尔让德·斯帕林克
Owner SONY CORP