## Electrical and Computer Engineering ETDs

#### Publication Date

Fall 9-30-1966

#### Abstract

Excerpt from the introduction:

This paper presents an analysis of the signal processing in a continuous wave, fixed-range, radio altimeter which utilizes random angle modulation, i.e., the modulating function is a sample function from a random process. The mathematical model of the altimeter is shown in block diagram form in Figure 1, and the physical situation in which the altimeter operates is illustrated in Figure 2. As shown in Figure 2, the altimeter is assumed to be on the vehicle "V" which has a relative velocity v with respect to the reflecting plane P. The velocity vector might have any orientation, but for simplicity we shall assume that it is colinear with the unit vector i_{y}. We assume that the altimeter is turned on when "V" reaches an altitude h_{o }+ Δh, so that the first reflected signal reaches "V" at altitude h_{o}. It is then required to provide an indication when "V" reaches altitude h_{1}. Regardless of whether or not the altimeter functions properly, we assume that it ceases to operate when "V" reaches plant P. Thus we consider only the interval of time required for "V" to travel from h_{o} to the plant P.

#### Document Type

Dissertation

#### Degree Name

Electrical Engineering

#### Level of Degree

Doctoral

#### Department Name

Electrical and Computer Engineering

#### First Committee Member (Chair)

Arnold H. Koschmann

#### Second Committee Member

Ahmed Erteza

#### Third Committee Member

Jovan Djuric

#### Recommended Citation

Post, Donald F.. "An Analysis of the Signal Processing in a Radio Altimeter Utilizing Random Angle Modulation." (1966). https://digitalrepository.unm.edu/ece_etds/504