jason25013080的专栏

Interference alignment is evaluated as a technique to mitigate inter-cell interference in the downlink of a cellular network using OFDMA. The sum mutual information achieved by interference alignment together with a zero-forcing receiver is considered, and upper and lower bounds are derived for the case of imperfect channel knowledge. The sum mutual information achieved by interference alignment when the base stations share their information about the channels is shown to compare favorably to the achievable sum-rate of methods where the base stations do not cooperate, even under moderately accurate knowledge of the channel state.

软频率复用（Soft Frequency Reuse，SFR）继承了部分频率复用的优点，同时采用动态的频率复用因子，比较显著的提高了频率利用率

协同中继系统中的多个通信实体间通过协作协议共享系统资源，使得系统具有较高的容量，本文提出的将预编码技术应用到协同系统中来有效地提高频谱效率。