Sideband

and 1520KHz 3.If a carrier is amplitude modulated what causes the sideband frequencies? - The non-linear mixing of the carrier and intelligence frequencies. 
 4.What determines the bandwidth of emission for an AM transmission? - It is twice the frequency of the highest audio frequency transmitted. The upper sideband is fc +FM where fc is the carrier frequency and FM is the modulation (audio) frequency .The lower sideband is fc – FM. The total bandwidth is 2*FM 5.Explain

Design of Non optical Carrier Single Sideband and wavelength reused DWDM passive optical network with Wired/Wireless Services Incorporating OFDM Abstract- In this work, an integrated passive optical network and free space optical communication system based on no-carrier single sideband modulation is proposed. Optical orthogonal frequency multiplexing is employed with dense wavelength division multiplexing to support 16 channels over 300 km bidirectional single mode fiber to enhance spectral efficiency

lower sideband, and a single sideband (SSB) signal may be generated by filtering or by using a single sideband mixer. Single sideband modulation may be viewed as the removal or reduction of the amplitude modulation signal component. In order to see how the SSB is created, it is necessary to use an amplitude modulated signal as a starting point. (Rosu, NA) Amplitude modulated carrier It shows sidebands on either side of the carrier From this it can be seen, the signal having the two sidebands, each

Radio: A Form of Communication Physics Idoh Gersten Mr. Zambizi Physics March 12, 1995 Radio is a form of communication in which intelligence is transmitted without wires from one point to another by means of electromagnetic waves. Early forms of communication over great distances were the telephone and the telegraph. They required wires between the sender and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation

In this work, we discussed the role of parallel flow shear in controlling the secondary pattern selection problem in drift wave turbulence. The principal results of this paper are summarized as follows. (-- removed HTML --) (-- removed HTML --) (-- removed HTML --) 1. (-- removed HTML --) (-- removed HTML --) The generation of zonal flows and streamers is formulated within the modulational instability framework. The effect of parallel flow shear has been included. The overall dynamics is governed

Orthogonal Frequency Division Multiplexing or OFDM is a modulation format that is being used for many of the latest wireless and telecommunications standards. OFDM has been adopted in the Wi-Fi arena where the standards like 802.11a, 802.11n, 802.11ac and more. It has also been chosen for the cellular telecommunications standard LTE / LTE-A, and in addition to this it has been adopted by other standards such as WiMAX and many more. Orthogonal frequency division multiplexing has also been adopted

Introduction Radio Stations within the UK are listened to frequently by large audiences throughout the country. This is achieved through the use of a number of different network media platforms either in Analogue or Digital form; including the Internet and traditional wired and wireless broadcasting such as AM/ FM networks. The objective of this report is to choose two examples of a broadcast radio platform – one being digital with the other being analogue and then describe in detail of the modulation

Define and explain the processes of frequency modulation (FM) and phase modulation (PM) and state their differences. 2. Calculate the modulation index given the maximum deviation and maximum modulating frequency, determine the significant number of sidebands in an FM signal, and calculate the bandwidth of an FM signal. 3. Define pre-emphasis and de-emphasis, state their benefits, and show how they are accomplished. 4. Name the advantages and disadvantages of FM and PM compared to AM. Angle modulation

creates electrical signals that are called a carrier signal. The carrier signal frequency is determined by the wave length. The carrier signal is modulated to carry voice by adding a contrast signal to the wave form. The receiver gets the pair of sidebands and transforms them into speech or other sounds. RF in a wireless environment can have dead spots due to line of sight issues. FDMA Frequency Division Multiple Access (FDMA) is a technique in which each user is assigned to a different frequency;

After the real time data is collected from the sensors, the first important step for condition monitoring and faults detection is to develop efficient signal analysis algorithm that can be used to extract useful information from raw data for further diagnostic and prognostic purpose. Several useful algorithms that widely used for faults detection purpose will be discussed in this section which includes time-domain analysis, frequency domain analysis, time-frequency analysis and wavelet transform