Spread spectrum. In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.
Lipids are one of the four major groups of organic molecules; the other three being proteins, nucleic acids (DNA), and carbohydrates (sugars). Lipids are made up of the same elements as carbohydrates: carbon, hydrogen, and oxygen.
Quick Answer. Dr. Ananya Mandal explains on News Medical that lipids are mainly composed of hydrocarbons, and they are highly reduced forms of carbon. They make up the building blocks of the structure and function of living cells. According to About.com's Regina Bailey, lipids have diverse structures and functions. The main lipid groups are fats, phospholipids, steroids and waxes. Fats contain glycerol and three fatty acids. They can be either liquid or solid at room temperature. Those in liquid form are classified as oils, while those in solid form are called fats.