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

A radio receiver and channel decoding technology, which is applied in the field of reliable information generated by the channel decoder in mobile wireless receivers, can solve the problems of large amount of calculation, memory requirements, and different states, so as to save power, reduce implementation difficulty, The effect of saving storage space

Inactive Publication Date: 2007-05-30
INTEL MOBILE COMM GMBH
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These latter bits are obtained by individual so-called "survivor" paths in the 2L' states of the trellis graph, 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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[0031]Relevant theoretical explanations forming 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" 1990 IEEE by Wolfgang Koch and Alfred Baier, with particular reference to Figure 1 In the transmission model of the illustrated mobile radio system, a mobile radio transmitter 1 and a mobile radio receiver 7 communicating with each other via a channel 6 are shown in FIG. 1 .

[0032] 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 performe...

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Abstract

The invention relates to a method for generating reliability information for decoding channel of radio receiver and corresponding radio receiver. The equaliser (8) of a radio receiver generates reliability information (q) indicating the probability that a received data symbol (z) depends on a given transmitted value. Said reliability information (q) is determined for each received data symbol (z) by means of trellis-state transitions according to a given metric, whereby trellis-based symbols and decision feedback symbols are used. State-independent symbols previously determined by means of a hard decision are used as decision feedback symbols.

Description

technical field [0001] The invention relates to a method of generating reliability information for a channel decoder in a radio receiver, in particular a mobile radio 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 information obtained by so-called so...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/00H03M13/00H03M13/27H03M13/39H03M13/41H03M13/45H04B3/06H04B7/005
CPCH04L1/0054H04L1/0071H03M13/3905H04L27/14
Inventor 瑞尔夫·哈德曼彼得·波宏
Owner INTEL MOBILE COMM GMBH
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