专利名称：Multi-Carrier Communication Systems
Employing Variable Symbol Rates andNumber of Carriers
发明人：William J. McFarland申请号：US14550999申请日：20141122
公开号：US20150078157A1公开日：20150319
专利附图：
摘要：A multi-carrier communication system such as an OFDM or DMT system hasnodes which are allowed to dynamically change their receive and transmit symbol rates,
and the number of carriers within their signals. Changing of the symbol rate is done bychanging the clocking frequency of the nodes' iFFT and FFT processors, as well as theirserializers and deserializers. The nodes have several ways of dynamically changing thenumber of earners used. The selection of symbol rate and number of earners can beoptimized for a given channel based on explicit channel measurements, a prioriknowledge of the channel, or past experience. Provision is made for accommodatinglegacy nodes that may have constraints in symbol rate or the number of carriers they cansupport. The receiver can determine the correct symbol rate and number of earnersthrough a priori knowledge, a first exchange of packets in a base mode that all nodes canunderstand, or an indication in the header of the data packet which is transmitted in abase mode of operation that all nodes can understand.
申请人：The Connectivity Patent Trust
地址：Rancho Santa Fe CA US
国籍：US
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