Coding device and communication system using the same

Abstract

A coding device includes a coding circuit for converting a digital input into a coded output having a greater number of bits than the input an interleaving circuit for combining a plurality of words of the coded output and producing therefrom a data block having a plurality of the interleaved words and a puncturing circuit or repeating circuit for puncturing or repeating bits from the data block. The puncturing or repeating circuit uses a deleting or repeating pattern to provide data words for transmission during respective frames of a transmission channel. The deleting or repeating pattern is selected depending upon the characteristics of the coding circuit and of the interleaving circuit. The coding device is for use in a cordless communication system.

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TW451560B	3G	27/08/2003	ISLD-200309-005	KONINKLIJKE PHILIPS NV	S1 TS Number: TS 125 212 Version No: ---- Section No: Release : ---- S2 TS Number: TS 125 222 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
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Technologies

Channel Arrangement/Coding

Product

Not Available

Use Cases

Wireless communication

Services

Not Available

Claim

1. A rate matching circuit for adjusting the number of bits in a data block, the data block comprising a plurality of interleaved words generated by the action of an interleaving circuit on a coded output generated by the action of a coding circuit on a digital input, the coded output having a greater number of bits than the digital input, the rate matching circuit having means for adjusting the number of bits in the data block using a rate matching pattern to provide data bits for transmission during respective frames of a transmission channel, and means for selecting the rate matching pattern as a function of an interleaving depth, a bit deletion/repetition rate and said digital input, wherein a bit deletion/repetition pattern is selected to ensure that the deleted or repeated bits are not required to enable all bits from the digital input to be reconstructed.

2. A rate matching circuit as claimed in claim 1, wherein the rate matching pattern is selected as a function of the interleaving depth of the interleaving circuit.

3. A coding device comprising a rate matching circuit as claimed in claim 1, further comprising an interleaving circuit and a coding circuit.

4. A decoding device comprising for decoding a signal coded by a coding device as claimed in claim 3, and comprising a data reconstruction circuit for reconstructing the interleaved words, a de-interleaving circuit and a channel decoder.

5. The rate matching circuit of claim 1, wherein said coding circuit has one of a fixed code rate and a predetermined number of rates for a variable data source.

6. The rate matching circuit of claim 1, wherein said interleaving circuit is not adaptive.

7. The rate matching circuit of claim 1, wherein said interleaving circuit has a constant bit rate.

8. The rate matching circuit of claim 1, wherein said coding circuit has one of a fixed code rate and a predetermined number of rates for a variable data source, and wherein said interleaving circuit is not adaptive.

9. The rate matching circuit of claim 1, wherein said rate matching circuit alters a coding rate of said coding circuit

10. A rate matching circuit for adjusting the number of bits in a data block, the data block comprising a plurality of interleaved words generated by the action of an interleaving circuit on a coded output generated by the action of a coding circuit on a digital input, the coded output having a greater number of bits than the digital input, the rate matching circuit having means for adjusting the number of bits in the data block using a rate matching pattern to provide data bits for transmission during respective frames of a transmission channel, and means for selecting the rate matching pattern depending on the characteristics of the coding circuit and of the interleaving circuit, wherein the rate matching pattern is selected as a function of an interleaving depth, a bit deletion/repetition rate and said digital input, wherein a bit deletion/repetition pattern is selected to ensure that the deleted or repeated bits are not required to enable all bits from the digital input to be reconstructed

11. The rate matching circuit of claim 10, wherein the rate matching pattern forms a matrix including change bits that indicate change of corresponding bits of said interleaved words within said data block, wherein each row of said matrix includes a maximum of one of said change bits

12. A method of operating a rate matching circuit to adjust the number of bits in a data block, the data block comprising a plurality of interleaved words generated by the action of an interleaving circuit on a coded output generated by the action of a coding circuit on a digital input, the coded output having a greater number of bits than the digital input, the rate matching circuit adjusting the number of bits in the data block using a rate matching pattern to provide data bits for transmission during respective frames of a transmission channel, and selecting the rate matching pattern as a function of an interleaving depth, a bit deletion/repetition rate and said digital input, wherein a bit deletion/repetition pattern is selected to ensure that the deleted or repeated bits are not required to enable all bits from the distal input to be reconstructed

13. The method of claim 12, wherein change bits of said rate matching pattern for deleting or repeating bits of said data block are offset with respect to the each other

14. The method of claim 12, wherein change bits of said rate matching pattern for deleting or repeating bits of said data block are offset with respect to the each other along adjacent columns of a matrix of said rate matching pattern

15. The method of claim 12, wherein change bits of said rate matching pattern for deleting or repeating bits of said data block are offset with respect to the each other along adjacent rows of a matrix of said rate matching pattern

16. The method of claim 12, wherein change bits of said rate matching pattern for deleting or repeating bits of said data block are offset with respect to the each other along adjacent rows and columns of said rate matching pattern

17. The method of claim 12, wherein said interleaving circuit forms said data block by filling said matrix row by row with row bits of said coded output and outputs column bits of said matrix column by column to form said interleaved words

18. A decoding device for decoding a coded digital signal comprising a received data block including interleaved words, said received data block having been processed by a rate matching circuit using a rate matching pattern to adjust a number of bits in said received data block, the decoding device comprising:', 'a data reconstruction circuit having means for adjusting the number of bits in said received data block to reverse action of said rate matching circuit, thereby reconstructing said interleaved words;', 'a de-interleaving circuit having means for generating each of said interleaved words; and', 'a channel decoder which receives said interleaved words provided by said de-interleaving circuit;', 'wherein change bits of said rate matching pattern are selected as a function of an interleaving depth, a bit deletion/repetition rate and said digital input, a bit deletion/repetition pattern having been selected to ensure that the deleted or repeated bits are not required to enable all bits from the digital input to be reconstructed

19. The decoding device of claim 18, wherein said change bits are offset with respect to the each other along adjacent rows or columns of a matrix of said rate matching pattern.']

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