Method and communication device for interference cancellation in a cellular communication system

A communication channel and channel coefficient technology, applied in the field of conflict elimination, can solve problems such as reducing the complexity of Viterbi equalization and not considering co-channel conflicts

Inactive Publication Date: 2007-03-21
QUALCOMM INC
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  • Abstract
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  • Claims
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Problems solved by technology

In addition, in K.D.Kammeyer's "Timetruncation of channel impulse responses by linear filtering: A method to reduce the complexity of Viterbi equalization (shortening the time of the channel impulse response through linear filtering: a method for reducing the complexity of Viterbi equalization)" AEU, Vol. 48, No. 5, pp. 237-243, 1994, discloses Kammeyer's pre-filter, which is designed to disconnect a single inter-symbol collision (ISI) channel, but does not consider co-channel collisions ( CCI)

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  • Method and communication device for interference cancellation in a cellular communication system
  • Method and communication device for interference cancellation in a cellular communication system
  • Method and communication device for interference cancellation in a cellular communication system

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Embodiment Construction

[0038] A preferred embodiment relates to a method and a communication device for single-antenna collision cancellation for message TDMA networks by decoupling linear filtering and in particular non-linear detection.

[0039] As can be seen in FIG. 1, a mobile station MS serving as a subscriber station communicates via a radio channel with a first base station BS1 of the cellular communication network GSM. The mobile station is located in a first radio cell c1 surrounding the first base station BS1. There are some objects that interfere with the communication between the mobile station MS and the base station BS1. A first object 0 interrupts the straight channel path s1 between the first base station BS1 and the mobile station MS. A second object 0 is arranged beside the straight communication path to serve as a reflector for radio waves. Thus, a second communication path s2 transmits radio waves sent by the first base station BS1 and reflected by the second object 0 . Thus,...

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Abstract

The invention relates to a method for interference cancellation of received data (y) being received via a communication channel (s1, s2,...) in a cellular communication system (GSM) and having corresponding channel impulse response coefficients (h), said method comprising the steps of linear filtering of said received data (y) (S1), and thereafter of executing a non-linear detection to get detected data (a) by non-linear signal processing. According to the preferred embodiment there is provided the step of determining of filter coefficients (w) for linear pre-filtering of said received data (y) to suppress non-Gaussian interference when filtering said received data (y). Further, preferred method comprises the step of processing of the pre-filtered data (z) by non- linear detection to get detected data (a).

Description

technical field [0001] The invention relates to a method for eliminating collisions in a cellular TDMA (Time Division Multiple Access) communication system according to the preamble of claim 1 . The invention also relates to a communication device for eliminating collisions in a cellular TDMA communication system according to the preamble of claim 14 . Background technique [0002] Currently, Single Antenna Co-Channel Collision Cancellation (SAIC) is a hot topic, especially for the downlink of Global System for Mobile Communications / Enhanced Data (GSM / EDGE). In field tracking, especially for synchronous networks in urban areas, huge capacity gains have been confirmed, [1] 3GAmericas "SAIC and synchronized networks for increased GSM capacity (SAIC and synchronous networks for increasing GSM capacity)" www.3gamericas. org, September 2003. Therefore, the upcoming GSM / EDGE release will have more urgency in deconfliction. [0003] Especially if there is only one receive antenn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03267H04L25/03261
Inventor S·巴德里-赫赫尔P·A·赫赫尔C·克拉科夫斯基许文
Owner QUALCOMM INC
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