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Method and apparatus for reducing interference to a desired signal

A technique of desired signal and interference signal, applied in the field of estimation and suppression of interference signal to improve receiver performance

Inactive Publication Date: 2017-10-17
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Interference from other cells is often the dominant impairment, even for wireless terminals not located at or near cell boundaries

Method used

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  • Method and apparatus for reducing interference to a desired signal
  • Method and apparatus for reducing interference to a desired signal
  • Method and apparatus for reducing interference to a desired signal

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Embodiment Construction

[0026] The invention now will be described more fully hereinafter with reference to the accompanying drawings, in which examples of embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should also be noted that these embodiments are not mutually exclusive. Thus, it may be assumed that a component or feature from one embodiment is present or used in another embodiment where such inclusion is appropriate.

[0027] For purposes of illustration and explanation only, described herein in the context of a radio access network (RAN) operating in communication with wireless terminals (also referred to as user equipment, or "UE") over radio communication channels These and other embodiments of the invention. However, it will be appreciated that the invention is not limited to such embodiments and may generally be embodied in any type of communication networ...

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Abstract

Techniques are described for extending the set of addressable interfering signals in an interference cancellation receiver, where the task of control message detection from interfering cells is integrated in an iterative receiver process, where information from previous iterations on received Better and better a priori information of the data signal is used to detect further control messages and successively grow the set of interfering signals involved in the receiver interference mitigation process. In an example method, first estimated symbols for a desired signal are generated. A control channel corresponding to a first interfering signal is detected, wherein the detection is based on the first estimated symbols. Signal characteristic information for the first interfering signal is then derived from the detected control channel signal and used to generate a second estimated symbol for the desired signal, using interference mitigation techniques to mitigate the impact of the interfering signal.

Description

Background technique [0001] The present invention relates generally to wireless communication receivers, and more particularly to techniques for suppressing interfering signals to improve receiver performance. [0002] The data rate that can be supported between two devices in a wireless communication system is very often limited by interference from nearby transmitters using the same spectrum. In particular, for the downlink (base station to wireless terminal transmission) in wireless cellular networks, the performance of the receiver at the target wireless terminal is often limited by interference from other cells. For uplink transmissions, similar issues apply to base station receivers. [0003] The impact of interference from other cells is characterized in terms of a "geometry factor". The geometry factor is defined as the total received power from the serving cell divided by the receiver power from all other neighbor cell base stations on the same carrier frequency. T...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04B1/7103
CPCH04B1/7103H04B1/7107H04J11/005H04J11/0059
Inventor A.赖亚尔A.瓦伦
Owner TELEFON AB LM ERICSSON (PUBL)