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    • 9. 发明申请
    • HEADER REPETITION IN PACKET-BASED OFDM SYSTEMS
    • 基于分组的OFDM系统中的主干重现
    • WO2011022593A1
    • 2011-02-24
    • PCT/US2010/046088
    • 2010-08-20
    • AWARE, INC.KIM, Joon, BaeTZANNES, Marcos, C.
    • KIM, Joon, BaeTZANNES, Marcos, C.
    • H04L1/08
    • H04L27/2601H04B1/38H04L1/08H04L27/2613H04L69/22
    • An OFDM communication system is described that allows different values of D in a single domain where nodes are operating in different portions of frequency bands. For the power-line medium, G.9960 has defined two overlapped baseband bandplans, 50MHz-PB and 100MHz-PB. In this exemplary scenario, the level of frequency diversity is different depending on the bandplan, hence providing different header decodibility if D is fixed to 1. If D is fixed to 2, then it increases reliability for the narrowband devices, but may also unnecessarily increase overhead for the wide-band devices. An exemplary aspect is therefore directed to techniques to accommodate different repetitions schemes (D = 1,..., DMAX and H = I,..., H MAX ) in a single domain, and still allow devices to communicate with one another where D MAX and H MAX can be larger than 2.
    • 描述了OFDM通信系统,其允许在节点在频带的不同部分中操作的单个域中的D的不同值。 对于电力线路媒体,G.9960已经定义了两个重叠的基带频带计划,50MHz-PB和100MHz-PB。 在该示例性场景中,根据频带规划,频率分集​​的电平是不同的,因此如果D固定为1,则提供不同的报头解码。如果D固定为2,则增加窄带设备的可靠性,但也可能不必要地增加 宽带设备的开销。 因此,示例性方面涉及在单个域中适应不同重复方案(D = 1,...,DMAX和H = I,...,HMAX)的技术,并且仍然允许设备彼此通信,其中DMAX HMAX可以大于2。