Pulse-shaping look-up table with transient suppression

Details Pulse-shaping look-up table with transient suppression Pulse-shaping look-up table with transient suppression

1998-07-28

2000-11-07

Tsang, Fan

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 84, 455563, 455296, 455222, 375285, 375346, 381 66, 381 941, 381 945, 381 93, H04Q 732

Patent

active

061448621

ABSTRACT:
The pulse-shaping look-up table with transient suppression (530) avoids hard turn-on and turn-off transients by modifying word segments of initial and final digital words during transmission of a digital data sequence. A controller (570) sends a mode signal and a digital data sequence to the pulse-shaping look-up table with transient suppression (530). A mode buffer and command block (560) uses the mode signal to control the creation of initial and final digital words created by a data buffer and control block (550) from the digital data sequence. The digital words are used by a look-up table (540) to create a sampled digital output waveform sequence. The pulse-shaping look-up table with transient suppression (530) provides an accurate output waveform sequence with reduced spectral emissions even during start-up and shut-down of digital data transmissions.

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patent: 5832022 (1998-11-01), Scott
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