To provide a method and apparatus for providing high speed data communication in a cellular environment.
Adjacent cells, of the cellular system, 1 and 2A-2F are prevented from simultaneously transmitting data. Because the noise from transmission 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 the path loss differences. In a first exemplary embodiment, the data rate of transmissions to the 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 transmission to the subscriber station 6 is determined by selecting a modulation format for the transmitted signal which directly changes the symbol rate of transmission to the subscriber station 6.
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama