Bit interleaving for orthogonal frequency division multiplexing

Details Bit interleaving for orthogonal frequency division multiplexing Bit interleaving for orthogonal frequency division multiplexing

1997-06-19

2000-11-21

Vu, Huy D.

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

370206, 375340, H04J 1100, H04L 2706

Patent

active

061512966

ABSTRACT:
In an orthogonal frequency division multiplexing (OFDM) system which uses an outer Reed-Solomon encoder and interleaver an inner convolutional encoder, after the inner convolutional encoding the data bits are interleaved, and then grouped into symbols, each symbol having "m" bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver. A receiver performs a soft decision regarding the value of each bit in each complex QAM symbol received.

REFERENCES:
patent: 4881241 (1989-11-01), Pommier et al.
patent: 5197061 (1993-03-01), Halbert-Lassalle et al.
patent: 5392299 (1995-02-01), Rhines et al.
patent: 5416801 (1995-05-01), Chouly et al.
patent: 5682376 (1997-10-01), Hayashino et al.
patent: 5790550 (1998-08-01), Peeters et al.

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