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1. US20130077720 - Multi-stage turbo equalization and interference cancellation receiver for wireless systems

Office
United States of America
Application Number 13402297
Application Date 22.02.2012
Publication Number 20130077720
Publication Date 28.03.2013
Grant Number 08681835
Grant Date 25.03.2014
Publication Kind B2
IPC
H04B 1/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
CPC
H04W 72/1278
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
12Dynamic; Wireless traffic scheduling ; ; Dynamically scheduled allocation on shared channel
1278Transmission of control information for scheduling
H04B 1/71075
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7097Interference-related aspects
7103the interference being multiple access interference
7107Subtractive interference cancellation
71075Parallel interference cancellation
H04B 1/712
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
712Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
H04W 72/082
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
04Wireless resource allocation
08where an allocation plan is defined; based on quality criteria
082using the level of interference
Applicants Wang Yi-Pin Eric
Telefonaktiebolaget LM Ericsson (publ)
Grant Stephen
He Ning
Johansson Niklas
Samuel Bebawy Michael
Inventors Wang Yi-Pin Eric
Grant Stephen
He Ning
Johansson Niklas
Samuel Bebawy Michael
Agents Nixon & Vanderhye, P.C.
Title
(EN) Multi-stage turbo equalization and interference cancellation receiver for wireless systems
Abstract
(EN)

In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. The receiver performs code-averaged equalization and chip chip-level code-specific interference over-cancellation on the received signals. This can result in a unified interference cancellation processing, and can avoid cumbersome calculations of code cross correlations that is required in symbol-level interference cancellation. A symbol-level code-averaged desired signal add-back is performed to address the over-cancellation of some desired signals.


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