一种适合5G的新型多载波技术——FB-OFDM

[摘要] 提出了一种适合5G的新型多载波技术——基于滤波器组的正交频分复用（FB-OFDM）技术，即在收发端通过多相滤波器进行子载波级滤波，简化实现的复杂度，与LTE系统兼容。认为在FB-OFDM系统中，根据不同场景的需求侧重点，选择合适的波形函数调制发射数据，能够灵活地适用于不同的业务。最后以扩展根升余弦函数为例，通过仿真验证了FB-OFDM系统的带外泄露小，异步性能好。

[关键词] 多载波；滤波器组；多相滤波器；波形函数

[Abstract] In this paper, a new type of multi-carrier technology—filter bank- orthogonal frequency division multiplexing (FB-OFDM) technology, which is suitable for 5G, is proposed. Subcarrier level filtering is carried out at the transceiver through polyphase filter, so as to simplify the implementation and be compatible with LTE system. According to the focuses of requirements in different scenes, FB-OFDM system can select appropriate waveform function modulation to transmit data which can be flexibly applied into different businesses. At last, taking expanding raise roof cosine as an example, it is verified through simulation that the out-of-band leakage of the FB-OFDM system is low and the asynchronous performance is good.

[Keywords] multicarrier; filter bank; polyphase filter; pulse function