Concept for Common European TV Channel

channel estimation for mimo-ofdm systems

تخمین دقیق مشخصات کانال در سیستم های مخابراتی یک امر مهم محسوب می گردد. این امر به ویژه در کانال های بیسیم با ‏خاصیت فرکانس گزینی و زمان گزینی شدید، چالش بزرگی است. مقالات متعدد پر از روش های مبتکرانه ای برای طراحی و آنالیز ‏الگوریتم های تخمین کانال است که بیشتر آنها از روش های خاصی استفاده می کنند که یا دارای عملکرد خوب با پیچیدگی ‏محاسباتی بالا هستند و یا با عملکرد نه چندان خوب پیچیدگی پایینی...

Available Channel Measurement in TV Whitespace with Adjacent Channel Interference

When using the sharing spectrum with others communication system, the most important thing is considering about harmful interference from unlicensed to licensed systems. With TV-band also, the digital television (DTV) can tolerate the interference from other system with their threshold and sharing spectrum regulations can guarantee the interference between communications system was characterize...

Standard Compliant Channel Selection Scheme for TV White Space Networks

In television white space networks, secondary users are required to query an authorised geo-location spectrum database (GSDB) in order to determine the vacant channels or white spaces. While recent development of the Protocol to Access White Spaces (PAWS) by the Internet Engineering Task Force (IETF) is intended to standardize communication between the GSDB and white space devices for sharing s...

An algorithm for determining common weights by concept of membership function

Data envelopment analysis (DEA) is a method to evaluate the relative efficiency of decision making units (DMUs). In this method, the issue has always been to determine a set of weights for each DMU which often caused many problems. Since the DEA models also have the multi-objective linear programming (MOLP) problems nature, a rational relationship can be established between MOLP and DEA problem...

The business concept of utilizing the interactive TV