by admin | Jun 7, 2015 | sem3
Phase Shift Keying Phase shift keying (PSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a reference signal (the carrier wave). Any digital modulation scheme uses a finite number of distinct signals to represent digital...
by admin | Jun 7, 2015 | sem3
Minimum Shift Keying In digital modulation, minimum-shift keying (MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s and 1960s.Similar to OQPSK, MSK is encoded with bits alternating between quadrature components, with the Q...
by admin | Jun 7, 2015 | sem3
Frequency Shift Keying Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave.The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to...
by admin | Jun 7, 2015 | sem3
Amplitude Shift Keying Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. In an ASK system, the binary symbol 1 is represented by transmitting a fixed-amplitude carrier wave and...
by admin | Jun 7, 2015 | sem3
multimedia databases In addition to the standard numeric, date and text data types, there are a number of data types that are regarded as the basic building blocks of MM applications. These data types, which are elements of more complex MM objects, are: text –...
by admin | Jun 7, 2015 | sem3
Spatial databases Spatial RDBMS is an RDBMS that can process spatial data. Popular RDBMSs, such as Oracle, offer their own Spatial RDBMS features or add-ons so that spatial data can be processed. Since each DBMS has a different architecture, it is difficult to show...
