TRANSMISSION POWER CONTROL METHOD, MOBILE TERMINAL DEVICE AND BASE STATION

摘要

PROBLEM TO BE SOLVED: To obtain a system which enables each terminal to communicate with a base station with high S/N by allowing the base station to allocate at least one of orthogonal code sequences for spread spectral to power control which is not applied to modulation of a pilot signal and a transmission signal to a terminal as a dedicated code. SOLUTION: A receiving signal that is subjected to primary inverse spreading in a multiplier 304 is inputted to multipliers 313 and 310. The signal inputted to a multiplier 303 is subjected to secondary inverse spreading by an orthogonal code WO generated from an orthogonal code generator 306. The code WO corresponds to an orthogonal code for spread of a pilot signal that is periodically outputted by a base station, the signal that undergoes inverse spreading by the code WO is inputted to an accumulator 314 and the pilot signal can be demodulated by accumulating it in a fixed period. The pilot signal is squared by a squaring device 315, becomes a signal that shows momentary electric power of pilot signal success and is inputted to a 1st terminal of an S/N measurement circuit 316.