Base-band interleaver for code division multiple access mobile t

Details Base-band interleaver for code division multiple access mobile t Base-band interleaver for code division multiple access mobile t

1997-09-22

2000-05-16

Ton, Dang

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370320, H04J 1300

Patent

active

060646640

ABSTRACT:
A base-band interleaver for forward traffic and paging channel for CDMA mobile telecommunication system with reduced memory size for data interleaving and more simplified construction. Modulo-16 circuit divides an index by a numeral 16, the index being a selected one of successive indexes 0 to 383 corresponding to input data, and provides a remainder. Bit invertor makes bit inversion of an output from the modulo-16 circuit and determines a column position to write in the data with interleaving taken. Quotient-16 circuit produces a quotient of dividing of the index by the numeral 16. Code converter has a row table by which the quotient is respectively matched to a row position to be written with interleaving taken, for generating a row position corresponding to the quotient. 24-based counter provides a 24-based counted value corresponding to a selected row of output data to read out. 16-based counter provides a 16-based counted value corresponding to a selected column of output data to read out. Memory has an interleaving table inclusive of 32 rows and 16 columns, the input data being written to a selected position of the interleaving table according to an output of the bit invertor and an output of the code converter, the output data being data read out from a position corresponding to the output of the 16-based counter and the output of the 24-based counter.

REFERENCES:
patent: 4394642 (1983-07-01), Currie et al.
patent: 4559625 (1985-12-01), Berlekamp et al.
patent: 4677626 (1987-06-01), Betts et al.
patent: 4742517 (1988-05-01), Takagi et al.
patent: 5042033 (1991-08-01), Costa
patent: 5056112 (1991-10-01), Wei
patent: 5063533 (1991-11-01), Erhart et al.
patent: 5136588 (1992-08-01), Ishijima
patent: 5241563 (1993-08-01), Paik et al.
patent: 5276827 (1994-01-01), Delaruelle et al.
patent: 5535220 (1996-07-01), Kanno et al.
patent: 5537420 (1996-07-01), Huang
patent: 5636224 (1997-06-01), Voith et al.
patent: 5659580 (1997-08-01), Partyka
patent: 5898698 (1999-04-01), Bross
Rikkinen et al. "A Data Transmission Method, CDMA Transmitter, and CDMA Receiver" abstract Jun. 15, 1995.

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