Measures of spectral efficiency in land mobile radio

Measures of spectral efficiency are very important to the resolution of contemporary issues in Land Mobile Radio (LMR), because they (a) allow the comparison of existing and proposed systems in terms of their spectral efficiency; (b) permit estimates to be made of the ultimate capacity of various system types at different levels of development; and (c) are useful in setting minimum standards for spectral efficiency. The purpose of this paper is to review the advantages, disadvantages, and limitations of various measures of spectral efficiency that have been proposed.