نتایج جستجو برای: internet and broadcast channels
تعداد نتایج: 16875267 فیلتر نتایج به سال:
We introduce the problem of a single source attempting to communicate information simultaneously to several receivers. The intent is to model the situation of a broadcaster with multiple receivers or a lecturer with many listeners. Thus several different channels with a common input alphabet are specified. We shall determine the families of simultaneously achievable transmission rates for many ...
Rateless codes, also known as fountain codes, are a class of erasure error-control codes that are particularly well suited for broadcast/ multicast systems. Raptor codes, as a particularly successful implementation of digital fountain codes, have been used as the applicationlayer forward error correction (FEC) codes in the third generation partnership program (3GPP) Multimedia Broadcast and Mul...
Recently there has been increasing interest in the application of broadcast networks as high-bandwidth downstream channels of hybrid asymmetric communication platforms. This interest stems from an increasing number of mobile internet users demanding for high quality services whereas wireless networks still lack in bandwidth substantially. In this paper we introduce a proxy architecture enabling...
The purpose of cryptography is to transmit information in such a way that access to it is restricted entirely to the intended recipient, even if the transmission itself is received by others. This science is of increasing importance with the advent of broadcast and network communication, such as electronic transactions, the Internet, e-mail, and cell phones, where sensitive monetary, business, ...
Orthogonal frequency division multiplexing (OFDM) is used in order to provide immunity against very hostile multipath channels in many modern communication systems.. The OFDM technique divides the total available frequency bandwidth into several narrow bands. In conventional OFDM, FFT algorithm is used to provide orthogonal subcarriers. Intersymbol interference (ISI) and intercarrier interferen...
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