| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for implementing high speed data communications in a cellular environment. <P>SOLUTION: There are provided a method and apparatus for transmitting digital data in a cellular environment. Adjacent cells of a cellular system 1, 2A-2F are prevented from simultaneously transmitting data. Because the noise from transmissions of adjacent cells is a primary source of interference, the transmission rate of power limited base stations 1-3 can be dramatically increased when the noise from adjacent cells is eliminated. The transmissions to each subscriber station 6 are made at a fixed transmission power level. However, the data rate of transmitted signals differs from one subscriber station 6 to another depending on the path loss differences. In a first exemplary embodiment, the data rate of transmissions to a subscriber station 6 is determined by selecting an encoding rate for the transmitted signal while holding the symbol rate constant. In a second exemplary embodiment, the data rate of transmissions to a subscriber station 6 is determined by selecting a modulation format for the transmitted signal which directly changes the symbol rate of transmission to a subscriber station. <P>COPYRIGHT: (C)2012,JPO&INPIT |
