Compensation based bit-error-rate estimation for...

Details Compensation based bit-error-rate estimation for... Compensation based bit-error-rate estimation for...

2006-06-20

2006-06-20

Chin, Stephen (Department: 2634)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S324000, C375S346000, C370S332000, C370S334000, C714S704000, C714S746000, C714S754000

Reexamination Certificate

active

07065159

ABSTRACT:
In a UMTS (universal mobile telecommunications system) based system, a wireless receiver comprises a convolutional decoder, a processor and memory. The convolutional decoder processes a received signal and provides a Yamamoto-Itoh (YI) metric to the processor. The processor (a) retrieves, from a look-up table stored in the memory, a compensation factor as a function of the YI metric value provided by the Viterbi decoder; (b) retrieves, from another look-up table stored in the memory, an initial BER estimate as a function of the YI metric; and (c) modifies the initial BER estimate with the retrieved compensation value to provide a BER estimate.

REFERENCES:
patent: 5710784 (1998-01-01), Kindred et al.
patent: 5751725 (1998-05-01), Chen
patent: 5917837 (1999-06-01), Stein
patent: 6175590 (2001-01-01), Stein
patent: 6222830 (2001-04-01), Padovani et al.
Yamamoto, H., and Itoh, K., “Viterbi Decoding Algorithm for Convolutional Codes with Repeat Requests”,IEEE Transactions on Information Theory, vol. IT-26, No. 5, Sep. 1980.

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