FDM in LTE Conventional multi-carrier operation as it is used for FDM works simply by selecting a number of center frequencies - one for each carrier
Read MoreThe price for the optimum subcarrier spacing is the sensitivity of OFDM to frequency errors. If the receiver’s frequency is some fractions of the subc
Read MoreRF engineering is a trade off between: required radio spectrum (bandwidth), speed of data transmission (bit rates) and complexity of implementation. T
Read MoreThere Are Three Codes in CDMA PN Long Code,PN Short Code & Walsh Code. PN Long Code The Long Code is a PN sequence that is 242 - 1 bits (chips)
Read MoreWiMAX antennas, just like the antennas for car radio, cell phone, FM radio, or TV, are designed to optimize performance for a given application. The f
Read MoreIn an actual application, the system implements the modulation in this way: as shown above, I and Q channel sequences in the figure represen
Read MoreThe Handover is the process of transferring an ongoing call or data session fromone cell connected to the core network to another It is transparent fo
Read MoreTo provide the most critical information to the UEs, the eNodeB uses the BCH channel The information is sent on pre-defined time-frequency resou
Read MoreThe original release of the EIA/TIA-95-B standard defined the protocol messages and formats to be used in the CDMA system. This release is know as Rev
Read MoreThe 3G LTE uses 3 Quadrature Amplitude Modulations (QAMs) depending on the radio quality. QAM uses both the amplitude and the phase. LTE dev
Read MoreThe radio waves are distributed in 3Hz ~ 3000GHz. This spectrum is divided into 12 bands, as shown in the above table. The frequencies in each
Read MoreIf the voice signal is modulated and transmitted directly after channel coding, due to the condition changes in mobile communication channel
Read More