The cyclic prefix is commonly used in the context of frequency domain equalization in DMT channels. In this paper we observe that it can be used in more general contexts and show its advantages in blind equalization, especially for non minimum phase channels.

In this report, we study the diversity-multiplexing tradeoff(DMT) in MIMO channels. DMT in MIMO channels is first introduced by Zheng and Tse. Based on their ideas, other researchers extended to different aspects. We will study DMT in two different aspects. In the first aspect, we will introduce DMT in different MIMO fading channels. In the second aspect, we will study different codes which wil...

The United States and most other advanced countries are closing on five years of flat-out expansionary monetary policy that has failed in all cases to restore normal conditions of employment and output. These countries have been in liquidity traps, where monetary policies that normally expand the economy by enlarging the monetary base are ineffectual. Reserves have become near-perfect substitut...

T here is always uncertainty about the soundness of an economic model’s structure and parameters. Therefore, central banks normally face with uncertainty about the key economic explanatory relationships. So, policymaker should take into account the uncertainty in formulating monetary policies. The present study is aimed to examine robust optimal monetary policy under uncertainty, by ...

This is a special conference for the Federal Reserve Bank of Boston, and for me personally. The role of monetary aggregates in monetary policy was intensely controversial when I joined the staff of the Board of Governors in May 1969. I was immediately asked to join the staff of the newly formed FOMC Committee on the Directive. Governor Sherman Maisel chaired that committee; the other two member...

the history of monetary policy in iran, judging by their performance in keeping the value of the currency, maintaining a steady growth in the gross domestic product, faltering investment, show that monetary policy has not been a portrait of consistent successes, to say the least. as a result of the recent studies two rules have emerged as guideline for policy makers: taylor rule and mccallum ru...

Time-cost trade-off is one of the most important subjects in project management and of interest to contractors. The goal of time-cost trade-off is sensivity analysis of project costs to changes in activity duration in order to obtain the best combination of activity duration decrease, in a way that the sum of project costs is minimized. In the heuristics presented in this area, time crashing is...

this paper tries to evaluate the nature of open market operation in the conventional banking system and to compare the usage of government securities and central bank securities for conducting this operation. in addition, the experience of the iranian central bank in using central bank musharakah certificates is reviewed. the main results of the paper, derived from an analytical- descriptive ap...