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SIMPLIFIED DATA DEMODULATION SCHEME USING DECIMATION PHASE CONTROL

IP.com Disclosure Number: IPCOM000005594D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2001-Oct-18

Publishing Venue

Motorola

Related People

Authors:
Lester Longley

Abstract

An important operation in data demodulation is sampling the filtered, received waveform at the decision instant, so that intersymbol interference is minimized and so that the signal-to-noise ratio of the sampled out- put is maximized. Most conventional datademodulation systems operate on a continuous-time analog signal, performing pulse-shaping filtering followed by a threshold unit to obtain adata sample. Alternatively, an integrate- and-dump operation may be used toobtain the datasample. In either case, the decision instant is continuously controlled by time-synchronization circuitry.