WIRELESS NETWORKS AND MOBILE IP
WIRELESS NETWORKS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
4G
|
|
|
Wifi
|
|
|
WiMax
|
|
|
AMPS
|
Detailed explanation-1: -6. Which of the following technology does not use MIMO? Explanation: MIMO is used in mobile radio telephone standards such as recent 3GPP and 3GPP2. In 3GPP, High-Speed Packet Access plus (HSPA+) and Long Term Evolution (LTE) standards take MIMO into account.
Detailed explanation-2: -MIMO can be sub-divided into three main categories: precoding, spatial multiplexing (SM), and diversity coding. Precoding is multi-stream beamforming, in the narrowest definition. In more general terms, it is considered to be all spatial processing that occurs at the transmitter.
Detailed explanation-3: -Drawbacks or disadvantages of MIMO ➨The resource requirements and hardware complexity is higher compare to single antenna antenna based system. Each antenna requires individual RF units for radio signal processing. Moreover advanced DSP chip is needed to run advanced mathematical signal processing algorithms.
Detailed explanation-4: -Examples of MIMO systems include heat exchangers, chemical reactors, and distillation columns. These systems can be complicated through loop interactions that result in variables with unexpected effects.