Method and arrangement for implementing intra-frame interleaving

Abstract

A method and radio device are provided for interleaving a stream of data ( 201) including digital information symbols prior to transmission over a radio interface. A permutation is performed ( 202 203 401 402) to the steam of digital data thus producing a permutated stream of digital data (204). From the permutated stream of digital data there are provided at least two component streams (404) for mapping each component stream into a spreading code ( 406). The order of information symbols is reversed (405) in at least one component stream prior to mapping it into a spreading code.

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3G	20/12/2001	ISLD-200201-001	NOKIA CORP	S1 TS Number: TS 125 222 Version No: Illustrative part: ---- Release: + -	No	Family Member
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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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-----	-----	-----	-----	-----	S1 TS Number: ----- Version No: ----- Section No:----- Release:----- + -				-----	-----	-----	-----

Technologies

Channel Arrangement/Coding

Product

Not Available

Use Cases

Wireless communication

Services

Not Available

Claim

1. A method for interleaving a stream of data consisting of digital information symbols:
performing a permutation to the stream of digital data, thus producing a permutated stream of digital data,
producing, from the permutated stream of digital data, at least two component streams,
reversing the order of information symbols in at least one component stream and
mapping each component stream into a spreading code used for spread spectrum transmission over a radio interface.', 'performing a permutation to the stream of digital data, thus producing a permutated stream of digital data,', 'producing, from the permutated stream of digital data, at least two component streams,', 'reversing the order of information symbols in at least one component stream and', 'mapping each component stream into a spreading code used for spread spectrum transmission over a radio interface.

2. A method according to claim 1, comprising the step of reversing the order of information symbols in every second component stream prior to mapping these component streams into their corresponding spreading codes.

3. A method according to claim 1, wherein the step of performing a permutation to the stream of digital data comprises the steps of
writing the information symbols of a certain passage of the stream of data into a permutation matrix and
reading the information symbols from the columns of said permutation matrix in a column order which is different than the order of continuous columns in said permutation matrix;
so that the steps of producing at leant two component streams and reversing the order of information symbols in at least one component stream are performed on a discrete sequence of information symbol obtained as a result of said reading of the information symbols from the columns of said permutation matrix.', 'writing the information symbols of a certain passage of the stream of data into a permutation matrix and', 'reading the information symbols from the columns of said permutation matrix in a column order which is different than the order of continuous columns in said permutation matrix;', 'so that the steps of producing at leant two component streams and reversing the order of information symbols in at least one component stream are performed on a discrete sequence of information symbol obtained as a result of said reading of the information symbols from the columns of said permutation matrix.

4. A radio device comprising means for interleaving a stream of data consisting of digital information symbols prior to transmission over a radio interface, comprising:
a permutator adapted to perform a permutation to the stream of digital data, thus producing a permutated stream of digital data,
a component stream producer adapted to produce, from the permutated stream of digital data, at least two component streams,
symbols order reverser adapted to reverse the order of information symbol in at least one component stream and
a mapper adapted to map each component stream into a spreading code used for spread spectrum transmission over a radio interface.', 'a permutator adapted to perform a permutation to the stream of digital data, thus producing a permutated stream of digital data,', 'a component stream producer adapted to produce, from the permutated stream of digital data, at least two component streams,', 'symbols order reverser adapted to reverse the order of information symbol in at least one component stream and', 'a mapper adapted to map each component stream into a spreading code used for spread spectrum transmission over a radio interface.

5. A radio device according to claim 4, the radio device being a mobile terminal of a 3GPP radio communication system.

6. A radio device according to claim 4, the radio device being a base station of a 3GPP radio communication system.']

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