子载波功率资源分配，OFDM技术将信道分成许多正交子信道，在每个子信道上使用一个子载波进行调制，并且各个子载波并行传输-Power resource allocation of the sub-carriers, OFDM technology will channel into a number of orthogonal subchannels, in each subchannel to use a sub-carrier modulation, and the respective su