Engineering topics

Weber, Charles

Publications and source records attributed to Weber, Charles.

3 records

NASA NTRS1995

N-Consecutive-Phase Encoder

N-consecutive-phase encoder (NCPE) is conceptual encoder for generating alphabet of N consecutive full-response continuous-phase-modulation (CPM) signals. Enables use of binary preencoder of higher rate than used with simple continuous-phase encoder (CPE). NCPE makes possible to achieve power efficiencies and bandwidth efficiencies greater than conventional trellis coders with continuous-phase frequency-shift keying (CPFSK).

Divsalar, Dariush↗

NASA NTRS1993

Trellis Coding of Two Consecutive Full Response 4-ary CPFSK with Modulation Index 1/4

It is well known that trellis codded modulation schemes using multidimentional constellations for MPSK and QAM have a number of advantages, such as improved performance, over the more common two dimensional schemes [1,2].

Trellis Coding↗

NASA NTRS1993

Trellis Coding of Two Consecutive Full Response 4-ary CPFSK with Modulation Index 1/4

It is well known that trellis codded modulation schemes using multidimensional constellations for PSK and QAM have a number of advantages over the more common two dimensional schemes.

Trellis Coding↗