| 摘要 |
<p>PURPOSE:To further accelerate transmission speed without deteriorating error rate characteristic and interference wave elimination capacity, etc. CONSTITUTION:At a transmitter, a serial data symbol as information to be transmitted is converted to parallel data in which the symbol is shifted at every two chip time interval 2Tc, and after that, a spread signal is affected on each parallel data, and those data are added by an added means ADD, and a carrier wave is modulated by those added output and is transmitted. Also, a receiver, after demodulating a transmission signal from the transmitter, inputs a demodulation signal to a matched filter MF in accordance with a spread code used in the transmitter, and samples the output of the matched filter MF at the time interval 2Tc, and reproduces a data symbol.</p> |
