Patent ID: 8208862

Claim:
A wireless system for performing wireless communication, the wireless system comprising: a wireless transmitting unit including a basic pilot signal sender to send out a basic pilot signal whose power and spreading ratio are greater than those of a data channel, a specific pilot signal generator to generate a specific pilot signal whose power and spreading ratio are identical with those of the data channel, a data channel generator to receive propagation environment information and generating the data channel with a transmission format corresponding to the received propagation environment information, and a wireless transmitter to determine a reception quality level of a receiving side based on a value of the received propagation environment information, transmitting the data channel if the reception quality level is judged to be of an ordinary quality level when the value is out of a certain range, and transmitting a specific radio signal including the specific pilot signal and the data channel if the reception quality level is judged to be of a high quality level when the value is within the certain range; and a wireless receiving unit including a propagation environment information notifier to measure a signal-to-interference ratio of the basic pilot signal if the specific pilot signal is not detected, measuring a signal-to-interference ratio of the specific pilot signal if the specific pilot signal is detected, generating propagation environment information corresponding to a measurement result, and notifying the wireless transmitting unit of the generated propagation environment information, and a data channel receiver to receive the data channel and processing the received data channel.