Title:
GMSK MODULATION TECHNIQUES
Document Type and Number:
WIPO Patent Application WO2004082231
Kind Code:
A3
Abstract:
This disclosure is directed to digitally implemented GMSK modulation techniques. The digital GMSK modulation techniques make use of a lookup table (LUT) and mapping logic to digitally generate GMSK waveforms. The mapping logic can significantly reduce the size of the LUT, and thereby reduce memory requirements needed for effective digitally implemented GMSK modulation. A disclosed method comprises : selecting a first GMSK waveform from a LUT based on a first subset of an input bit stream; inverting the first GMSK waveform to generate a second GMSK waveform; and selecting one of the first and second GMSK waveforms based on a second subset of the input bit stream.
Inventors:
O'SHEA HELENA DEIRDRE (US)
Application Number:
PCT/US2004/006758
Publication Date:
October 28, 2004
Filing Date:
March 05, 2004
Export Citation:
Assignee:
QUALCOMM INC (US)
O'SHEA HELENA DEIRDRE (US)
O'SHEA HELENA DEIRDRE (US)
International Classes:
H04L25/03; H04L27/20; (IPC1-7): H04L27/20; H04L25/03
Foreign References:
| EP0494696A2 | 1992-07-15 | |||
| US4686688A | 1987-08-11 | |||
| EP0388381A1 | 1990-09-19 |
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