Along with the estimation scheme, pilot tone placement is studied. 此外,還研究了所提算法中的導頻分布問(wèn)題。
It is better to group pilot tones together into clumps that are equispaced in the frequency domain. 可以證明,在快時(shí)變環(huán)境下,分組且每組等間隔分布于頻域上的導頻序列有著(zhù)更好的系統性能。