The 2G GSM technology uses a carrier separation ofa.300 KHzb.200 KHzc.1.25 MHzd.30 KHz

Discuss the components of a GSM architecture

The type of access used in GSM technology isa.TDMAb.OFDMAc.CDMAd.FDMA

Describe the following CDMA 3G OFDM Multi-user detection GSM

Relembrando o 4G, ele tem um espaçamento de subportadoras de 15 kHz e pode ter as seguintes largurasde banda: 1,4; 3; 5; 10; 15 e 20 MHz. Para a largura de banda de 15 MHz indique quantos símbolos OFDM(Orthogonal Frequency Division Multiplexing) vão em paralelo e qual a duração de cada símbolo (nãoconsidere a duração do cyclic prefix).

By flexibly allocating bandwidth on the air interface, GPRS exceeds the slow dataratesof GSM circuit‐switched connections of 9.6 or 14.4 kbit/s. Datarates of up to 170kbit/s are theoretically possible. Multislot class 10 mobile devices (see below) reachspeeds of about 85 kbit/s and are thus in the range of the fixed‐line analog modemsthat were in widespread use at the time GPRS was introduced.