Title :
Coded M-DPSK with built-in time diversity for fading channels
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
Good coded modulation for fading channels requires built-in time diversity. Under a constraint on the interleaving delay, the authors construct and compare three categories of coded M-DPSK (M-ary differential phase-shift keying) schemes with 4⩽M⩽16 for fading channels: two-dimensional trellis-coded, multidimensional trellis-coded, and block-coded. General rules for designing these schemes and their matched bit or symbol interleavers are given. A universal two-state interleaver is shown. These schemes have been extensively evaluated, using computer simulations, for a narrow-band cellular radio channel at different vehicle speeds, with and without twofold antenna diversity
Keywords :
block codes; cellular radio; delays; diversity reception; fading; phase shift keying; telecommunication channels; trellis codes; M-ary differential phase-shift keying; antenna diversity; block-code; coded M-DPSK; computer simulations; fading channels; interleaving delay; matched bit interleaver; multidimensional trellis-code; narrowband cellular radio channel; symbol interleaver; time diversity; two-dimensional trellis-code; universal two-state interleaver; vehicle speeds; Computer simulation; Delay; Differential phase shift keying; Fading; Interleaved codes; Land mobile radio cellular systems; Modulation coding; Multidimensional systems; Narrowband; Vehicles;
Journal_Title :
Information Theory, IEEE Transactions on
