Robust modulation techniques and detection algorithms for optical OFDM in passive optical networks

无源光网络标准目前正在发展中[1]。第一次演进寻求通过部署的光纤基础设施增加容量，该光纤基础设施具有树状分层结构，具有用于分发的光学拆分。第二次演进，或所谓的NG-PON2(下一代PON2)，将允许部署新的基础设施，以更容易地支持波分复用(WDM)。WDM的典型部署涉及向频域中的所有用户分配相同的带宽，并动态分配时隙以提供稳健的供应。另一种WDM策略是使用正交频分多路复用(Ofdm)作为频率时隙(子载波)以及时隙的动态分配，以实现用于动态资源分配的更大粒度。

The PON standard is currently in evolution [1]. The first evolution seeks increased capacity with the deployed optical infrastructure featuring a tree hierarchy with optical splitting for distribution. The second evolution, or so-called NG-PON2 (next generation PON2), will allow for deployment of a new infrastructure to more readily support wavelength division multiplexing (WDM). Typical deployment of WDM involves identical bandwidth allocations to all users in the frequency domain, with dynamic allocation of time slots to provide robust provisioning. An alternative WDM strategy is to use orthogonal frequency division multiplexing (OFDM) as a dynamic allocation of frequency slots (subcarriers) as well as time slots to achieve even greater granularity for dynamic resource allocation.