Motorola Corporation

Niels Vinggaard

Arvind S Arora

Brian Keith Classon

Brett L Robertson

Joseph F Thome

Ashish Batra

A window error detector for a receiver capable of operating in a discontinuous transmit mode includes a soft decision decoder (,) producing soft output and generating window error signals. A detector (,) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit state. A turbo decoder (,) for a receiver includes a soft decision decoder and a window error detector (,) coupled to the soft decision decoder. The window error detector generates a bad frame indication. The turbo decoder stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.

Bad frame detector and turbo decoder

An error detector circuit (300) for a discrete receiver indicates bad frames of binary information signals which contain distorted bits of data in numbers so great as to prevent a convolutional decoder (738) from generating, accurately, a decoded signal. A variable threshold generator (440) generates a variable threshold level according to the signal quality estimate for the received signal. When bit errors are detected in numbers beyond the variable threshold or when a first preselected value of the signal quality of a received signal combined with the detected number of bit errors forms a signal beyond a second preselected value, a bad frame is indicated.

Error detector circuit for digital receiver using variable threshold

An error detector circuit, and an associated method, for a discrete receiver. The error detector circuit indicates bad frames of binary information signals which contain distorted bits of data in numbers so great as to prevent a convolutional decoder from generating, accurately, a decoded signal. When bit errors are detected in numbers beyond a first preselected value of the signal quality of a received signal combined with the detected number of bit errors forms a signal beyond a second preselected value, a bad frame is indicated.

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Arlington Heights, IL, United States of America

Niels Vinggaard