by admin | Jun 7, 2015 | sem3
Cellular Concept and Frequency Reuse CELLULAR CONCEPT AND FREQUENCY REUSE In the cellular concept, frequencies allocated to the service are re-used in a regular pattern of areas, called ‘cells’, each covered by one base station. In mobile-telephone nets...
by admin | Jun 7, 2015 | sem3
Code division multiple access Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single...
by admin | Jun 7, 2015 | sem3
data warehousing testing Testing is very important for data warehouse systems to make them work correctly and efficiently. There are three basic levels of testing performed on a data warehouse: Unit testing Integration testing System testing Unit Testing In unit...
by admin | Jun 7, 2015 | sem3
data warehousing tuning and testing A data warehouse keeps evolving and it is unpredictable what query the user is going to post in the future. Therefore it becomes more difficult to tune a data warehouse system. In this chapter, we will discuss how to tune the...
by admin | Jun 7, 2015 | sem3
Global System for Mobile Communications GSM Introduction: GSM is the short form of Global System for Mobile Communications. It is called 2G or Second Generation technology. It is developed to make use of same subscriber units or mobile phone terminals throughout the...
by admin | Jun 7, 2015 | sem3
data warehousing backup A data warehouse is a complex system and it contains a huge volume of data. Therefore it is important to back up all the data so that it becomes available for recovery in future as per requirement. In this chapter, we will discuss the issues...
