| 摘要 |
The invention provides a system and method for transmitting information to multiple users simultaneously, over a wireless communications network, and for receiving, demodulating, downloading and storing the information at user bases, for access at any future time. The system comprises: one or more content providers (16), such as a news company, stock brokerage firm, Internet service provider, publisher or university; one or more service providers (18) that manage the information into channels; existing wireless transmission infrastructure (12), for example, that used by radio companies, and; a plurality of PC-based receivers (14) at user bases. The user base typically comprises an antenna (20), in conjunction with a specialised radio card designed to implement modulation techniques such as GMSK, QPM and Galaxy Modulation; a modem for demodulating the broadcast signal, and; processing means, such as a personal computer. |
