Why are different modulation and coding schemes used in EDGE?
The different EDGE modulation coding schemes are used as required to provide the optimum balance between high data rate and low error rate. As signal levels fall and noise levels rise, the higher levels of error correction are needed to maintain the integrity of the link.
What modulation scheme does EDGE use?
In addition to Gaussian minimum-shift keying (GMSK), EDGE uses higher-order PSK/8 phase-shift keying (8PSK) for the upper five of its nine modulation and coding schemes. EDGE produces a 3-bit word for every change in carrier phase. This effectively triples the gross data rate offered by GSM.
What is modulation and coding scheme?
MCS (Modulation and Coding Scheme) defines how many useful bits can be transmitted per Resource Element (RE). MCS depends on radio link quality. And vice versa the worse radio conditions the lower MCS and the less useful data can be transmitted. In other words MCS depends on error probability.
Which of the following modulation format is used in EDGE for high data rates?
8PSK
In order to enable data to be transmitted a form of phase modulation known as Octonary Phase Shift Keying, 8PSK was used. This form of modulation has a number of advantages that meant it was chosen for carrying high speed EDGE data: Able to operate within the existing GSM / GPRS channel structure.
What is MCS and where it is used?
For any communication technology, Modulation and Coding Scheme (MCS) defines the numbers of useful bits which can carried by one symbol. In contrast with 5G or 4G, a symbol is defined as Resource Element (RE) and MCS defined as how many useful bits can be transmitted per Resource Element (RE) .
What are the main features of Evolved EDGE?
EDGE features both a packet capability, EGPRS (Enhanced General Packet Radio Service), and a circuit switched capability, ESCD (Enhanced Circuit Switched Data). EDGE packs up to 69.2Kbps into eight timeslots, for a total theoretical bandwidth of 473.6Kb.
Which modulation is used in 5G?
Orthogonal Frequency Division Multiplexing (OFDM) is an efficient modulation format used in modern wireless communication systems including 5G.
What is MCS 5G?
MCS stands for Modulation and Coding Scheme and TBS stands for Transport Block Size. Introduction: 5G NR (New radio) is latest cellular wireless technology which follows 3GPP specifications similar to LTE. MCS, TBS are used in physical layer of 5G NR system.
Which modulation scheme will have higher data rate?
In general, higher order modulation schemes such as 64-QAM offers a higher bandwidth efficiency at the expense of more complex receiver structure requirements and higher cell-to-cell interference that impacts frequency reuse while simple techniques such as QPSK offers better BER but lower data rate.
What is EDGE and CDMA?
Speed: EDGE Has the Advantage 3G network. Three times faster than GSM. 3G network. 2G system. CDMA shows an effective download speed of about 1 megabit per second, while GSM claims speeds of up to 7 Mbps.
What are the different modulation schemes for edge?
For EDGE, nine Modulation and Coding Schemes (MCS) are introduced (MCS1 to MCS9) and optimized for different radio environment. Four EDGE coding schemes are using GMSK and five are using 8 PSK Modulation. Mobile Station (MS) − MS should be EDGE enabled.
How many modulation coding schemes are there for GSM?
There are nine different GSM EDGE modulation coding schemes used to provide a variety of different error coding levels and data rates. GSM EDGE includes: GSM EDGE introduction Network architecture RF interface Modulation coding schemes Evolved EDGE.
How is channel modulation and Coding Scheme ( MCS ) used?
EDGE modulation and coding scheme (MCS) The channel encoding process in GPRS as well as EGPRS/EDGE consists of two steps: first, a cyclic code is used to add parity bits, which are also referred to as the Block Check Sequence, followed by coding with a possibly punctured convolutional code.
Why is GMSK used in GSM EDGE Evolution?
GSM EDGE modulation. One of the ways in which 2G GSM EDGE evolution is able to provide higher data rates is to use a different modulation scheme for higher data rates. However the GMSK modulation scheme used for the basic GSM system is still used for the lower data rates. It is resilient to noise when compared to many other forms of modulation.