Concatenated Codes is a type of error-correcting code formed by the series combinations of two or even more codes to form a complex one. By this approach, a long length code is produced that increases the randomness thereby increasing the encryption ability. This facilitates more secured data communication. Basically, the word ‘concatenation’ is used in …
Convolutional code is another type of error-correcting code where the output bits are obtained by performing a desired logical operation on a present bitstream along with considering some bits of the previous stream. This coding technique rather than depending on the block of bits shows dependency on bitstream. It is also a linear code that …
Linear block code is a type of error-correcting code in which the actual information bits are linearly combined with the parity check bits so as to generate a linear codeword that is transmitted through the channel. Another major type of error-correcting code is convolution code. In the linear block code technique, the complete message is …
The earth segment in the satellite communication system consists of earth stations (earth terminals) with their respective equipment, circuits and various links to the terrestrial network. Earth stations are a major part of the earth segment and can be of fixed or mobile nature. Earth stations are structurally quite complex as it includes the necessary …
The space segment is known to be another crucial aspect of satellite communication systems other than the control and user segment. The space segment undoubtedly includes satellites however it also comprises the ground-based units that help to maintain the operationality of satellites orbiting the earth. The space segment is designed to receive, store and retransmit …
The term attitude relative to satellite communication corresponds to the orientation of satellite (vehicle) in space. Attitude control is defined as controlling the orientation of the axis of satellites that are orbiting in space. So, the complete set of devices forming a system that helps to analyze and control the orientation of satellites in space …
Interleaving in communication is a process by which the ordering sequence of the encoded bits is changed so that the burst of errors gets distributed across various codewords present in the data rather than being bound to a single codeword. The process of interleaving is a crucial aspect of data communication. In other words, interleaving …
A satellite constellation is a collection of similar types of man-made satellites operating as a single unit in space. The satellites in the constellation are synchronized as a unit to orbit the earth in an optimal manner. Thus, we can say, satellite constellation consists of a group of various satellites deployed at the same altitude …
Geostationary Orbit refers to a circular orbit present above the earth’s equatorial plane possessing a period of revolution equivalent to the period of rotation of the earth. Here the term ‘geostationary’ corresponds to the orbit where the satellite appears to remain fixed at a point or stationary with respect to the surface of the earth. …
Global Positioning System commonly in trend as GPS is a type of satellite navigation system designed to provide the position and timing information of the user. Here the name itself is indicating that GPS includes a set of elements that forms a system that helps in globally locating the presence of users at a specific …