Broad spectrum modulation method, improvement in code division multiple access systems, method for transferring data to a plurality of radio apparatus, method for providing a communication service packet, base station and radio communication system. multiple code division access

摘要

"METHOD OF LARGE SPECTRUM MODULATION, IMPROVEMENT IN MULTIPLE SYSTEM ACCESS DIVISION CODE, METHOD FOR TRANSFERING DATA FOR A PLURALITY OF RADIO DEVICES, METHOD FOR PROPORTION DE SERIES DEPARTMENT, BASS DEPORTS ACCESS BY CODE DIVISION ". The present invention relates to improvements in a code division multiple access (CDMA) system using broad spectrum modulation, with the system (CDMA) having a base station (BS) and a plurality of remote stations. The base station has a BS broad spectrum transmitter and a BS broad spectrum receiver. The remote station has an RS broadband transmitter and an RS broadband receiver. The BS transmitter transmits a common synchronized transmission channel which includes a time synchronization signal. The synchronized common transmission channel has a common fragmented sequence signal, which is common to a plurality of remote stations. In response to the RS broadband receiver receiving the synchronized common transmission channel, and determining time synchronization from the time synchronization signal, an RS broadband transmitter transmits a suddenly increasing access signal to its amplitude which RS power control signals are transmitted in time at increased power levels. The BS broadband transmitter, in response to the BS broadband receiver receiving the suddenly increasing access signal at its amplitude, and detecting an RS preamble signal, transmits a receive signal. In response to the first RS broadband receiver receiving the receive signal, the first RS broadband transmitter transmits a broad spectrum signal having data. The BS broadband transmitter transmits both data and power control information to the RS broadband receiver.