| 摘要 |
The invention is concerned with providing a wireless transmitting and receiving system such that an information stream may be exchanged in both directions over a relatively short range and with a high level of robustness and tolerance to propagation conditions. Several applications are envisaged, such as a hand-off internet radio system in which the user equipment may resemble a traditional domestic analogue radio set combining features of robustness and high audio quality but able to play audio streams from internet radio stations, talking books and encoded music together with a transmitting command system. Other envisaged applications include robust tracking and location systems, range extension of wireless systems such as WiFi, Bluetooth and a robust video streaming system. The unlicensed low power Instrument Scientific Medical (ISM) and Short Range Devices (SRD) frequency bands are well suited to be used by the invention. The invention matches the baseband bandwidth and number of baseband channels to the propagation conditions of the wireless link, provides low peak to average spectral power density and automatic error correction without synchronisation dependency. These features make the invention extremely tolerant to the high variability in propagation conditions which are commonly experienced in indoor wireless reception. wireless hand-off transmitting and receiving system such that a radio station streamed over the internet may be received wirelessly using a receiver which to the user may resemble a traditional domestic analogue radio set combining features of robustness and high audio quality. A return communication channel provides an automatic means of adapting to changing propagation conditions of the wireless link as well as providing the user with the ability to control the information being received. |
