| 摘要 |
PROBLEM TO BE SOLVED: To exclusive the concentration of burden on a base station by performing the coherent demodulation of a backward link with simple constitution and to increase channel capacity by sending out a burst pilot to a prescribed time slot from each mobile station in a wideband CDMA mobile communication system. SOLUTION: In the backward link, a traffic signal is outputted by applying QPSK modulation to I and Q signals by prescribed processing. While, burst pilot processing is applied to a pilot channel, and it is transmitted to the backward link in a form of burst pilot as a pilot symbol. At this time, the width of the burst pilot 70 is adjusted to appropriate width required for sampling, and the burst pilot is excluded to be concentrated on the base station by providing the offsets 72 with different slots in each mobile station and setting different time slots sent from the burst pilot in each mobile station, then, mutual interference between the pilots is excluded. |
