试论独占加共享的频谱划分模式

Spectrum partition model of monopolization and sharing

有限的频谱资源制约了许多国家的可持续发展,而基于传统矩形频谱划分的经典信道容量和频谱利用率极限,已不能解释某些类正弦调制方法的高效性.针对超窄带调制类似正弦波的信号特征,提出了以超窄"频谱树"独占加较宽"频谱草"共享为特征的非矩形频谱划分模式,论证了该模式在充分利用现有频谱资源及合理容纳密集多载波信息传输体制方面的技术合理性,并指出了平行导出所提出的非矩形频谱划分模式下的信道容量表达式和单位频谱利用率极限的必要性.

The limited spectrum resource has restricted continuing developments of many nations, while the classical channel capacity and spectrum utilization limit based on typical rectangular spectra partition, can not explain the high-efficiency of some sine-like modulations already. Aiming at the sine-like signal characteristic of the ultra narrow band（UNB） modulations, a non-rectangular spectra partition mod- el is proposed which has a monopolized ultra narrow ＂spectrum tree＂ plus shared broad ＂spectrum grasses＂. Its technique reasonability is demonstrated in aspects of the full use of existing spectrum resources and the rational toleration of dense multi-carrier information transmission scheme. The necessity is pointed out for par-allelism derivation of the channel capacity expression and the unit spectrum utiliza tion limit, based on the proposed non-rectangular spectrum partition model.