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Method for generating reliability information for decoding channel of radio receiver and corresponding radio receiver

A radio receiver, channel decoding technology, applied to the transmitter/receiver shaping network, other decoding technologies, encoding, etc., can solve the problems of large calculations, memory requirements, and different states, so as to save power and reduce Difficulty of implementation, effect of saving computing power

Inactive Publication Date: 2002-09-04
INTEL MOBILE COMM GMBH
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Problems solved by technology

The last mentioned bits are obtained by a single so-called "surveyor" path in the 2L' states of the trellis diagram, however a series of states differ, thus requiring large computation and memory requirements, since the equalizer has to A directory that holds 2L' states for each time μ

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  • Method for generating reliability information for decoding channel of radio receiver and corresponding radio receiver
  • Method for generating reliability information for decoding channel of radio receiver and corresponding radio receiver
  • Method for generating reliability information for decoding channel of radio receiver and corresponding radio receiver

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Embodiment Construction

[0017] Relevant theoretical explanations which form the basis of the present invention can be found in the documents cited above, namely "Optimum and Sub-optimum Detection of Coded Data Disturbed by Time-Varying Intersymbol Interference" by Wolfgang Koch and Alfred Baier, 1990 IEEE, with particular reference to figure 1 The transmission model of the mobile radio system shown in figure 1 A mobile radio transmitter 1 and a mobile radio receiver 7 communicating with each other via a channel 6 are shown in .

[0018] In the transmitter 1, the information to be sent, such as speech information, is first converted into a digital signal by a source coder 2, that is, a sequence of symbols '1' and '0', and the source code data word or data vector b Form output, a single symbol or symbol has the value '1' or '0' in each case. The channel encoder 3 maps each data word into a code word C, and uses an interleaver 4 to replace, ie interleave, these symbols. Ideally interleaving is perform...

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Abstract

An equalizer of a radio receiver for generating reliability information (q) that specifies probabilities of a received data symbol (z) being based on a particular transmitted value. The reliability information (q) is determined for each received data symbol (z) by evaluating trellis state transitions through use of a particular metric, both trellis-based symbols and decision-feedback symbols being evaluated. The decision-feedback symbols used are state-independent symbols that have previously been decided by means of a hard decision.

Description

technical field [0001] The invention relates to a method for generating reliability information for a channel decoder in a radio receiver, in particular a mobile radio receiver, and to a corresponding receiver. Background technique [0002] Transmission channels in mobile radio systems are characterized by their time-dependent multipath reception, which in digital transmission systems leads to intersymbol interference. In order to be able to control such inter-symbol interference, the received data needs to be equalized at the receiving end. At the sending end, due to the rapidly changing transmission conditions, and in order to suppress the interference of adjacent channels and co-channels, the data to be sent is sent by means of interleaving and channel coding. [0003] In order to perform channel decoding at the receiving end, it is necessary to have information specifying the reliability of the equalization performed by the equalizer. This reliability information is in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/00H03M13/27H03M13/39H03M13/41H03M13/45H04B3/06H04B7/005H04L1/00
CPCH03M13/3905H04L1/0054H04L1/0071H04L27/14
Inventor 瑞尔夫·哈德曼彼得·波宏
Owner INTEL MOBILE COMM GMBH
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