FIELD: mobile communication systems. SUBSTANCE: mobile station device and method thereof use preamble generator to shape preamble signal conveyed during preamble interval preceding interval of return access channel message transmission and transmitter that functions to expand and modulate preamble signal coming from preamble generator and to transmit it to base station. EFFECT: enhanced reliability of preamble signal transmission. 31 cl, 11 dwg
Authors
Dates
2002-10-20—Published
1999-08-17—Filed