Sharif Digital Repository

In modern wireless mobile telephony networks, DS-CDMA based physical layers has gained much attention due to their ease of implementation at relatively low overall cost, ability to provide high speed data services, increased user capacity, and many other outstanding features. One of the challenges facing these systems is the synchronization of the users’ signature codes (received via communication channel) to the receiver’s locally generated replica, as the only distinguishing feature between users in such systems is the pseudo-orthogonal properties of these signature codes. To fully utilize this orthogonality, all sequences need to have a common time reference. But when relative sequence... 

Mergers and acquisitions are one of the easiest and sometimes the only way to stay in the market for small or low performing companies. In this research, which consists of two main parts, the impact of merger and acquisition on the stock price and financial statements of the involved companies that were listed in Iran stock exchange market was studied between 2007 and 2012.The first step, through an event study, abnormal stock returns of the targeted companies were studied in time spans of five and ten days before and after the merger and acquisition event. Then a t test was applied in order to examine whether this transaction had resulted in positive abnormal return for the shareholders or...