Method and apparatus for near-optimal scaling of...

Details Method and apparatus for near-optimal scaling of... Method and apparatus for near-optimal scaling of...

2008-05-20

2008-05-20

Odom, Curtis B. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C370S912000, C714S795000

Reexamination Certificate

active

10456148

ABSTRACT:
A method and an apparatus for scaling demodulated data symbols contained in a packet to generate scaled log-likelihood ratios for Turbo decoding are disclosed. A packet consists of one or more subpackets depending on the type of packet. Each subpacket is identified by a subpacket identification number. The payload size of the packet and the subpacket identification number may be determined by decoding a reverse rate indicator (RRI) channel. A scale factor which is associated with a specific subpacket identification number and a specific payload size results in a performance measure that is closest to an expected performance measure. The scale factor is used for scaling the demodulated data symbols to generate scaled log-likelihood ratios for Turbo decoding.

REFERENCES:
patent: 7003709 (2006-02-01), Wengerter et al.
patent: 2003/0076870 (2003-04-01), Moon et al.
patent: 2003/0097629 (2003-05-01), Moon et al.
Worm, Alexander et al. “Turbo-Decoding Without SNR Estimation,” IEEE Communications Letter, 4(6): 193-195, 2000.

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