Patent ID: 6778586
Filing Date: 2004-08-17
Classification: H04B,H04J

Abstract:
A radio communication apparatus using spectrum spread, comprising a transmission circuit which generates modulated signals by use of primary modulation and spreading of data to be sent and a receiving circuit which obtains data by use of de-spreading and demodulation of received signals, the apparatus comprising:a data divider which divides the data to be sent into a plurality of data rows each having a prescribed length; and a data generator which receives said data rows and generates data sets each including a prescribed preamble and the data row, said transmission circuit repeatedly transmitting the data sets each including the preamble and data row, and said receiving circuit receiving the data sets and capturing a portion of the received signal which corresponds to the preamble to accomplish acquisition, wherein said prescribed length of the data row is determined based on an error between a clock speed or clock frequency used in the transmission circuit and another clock speed or clock frequency which is expected to be used in a destination receiving circuit.