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19 Threads found on Shannon Channel Capacity
use shannon channel capacity theorem and classical thermodynamic Carnot's Law to derive the kT ln 2 minimum energy dissipation per bit for a communications channel. Otherwise known as the shannon/Carnot Limit. Can you express the noise mathematically?
The theoretical channel capacity (maximal achievable data rate with optimal modulation) is described by the shannon-Hartley theorem. As a simple conclusion, it says that the available data rate under given conditions (S/N ratio, modulation method) is proportional to bandwidth.
I suggest you find a telecomm textbook to check the answers. I alomst forgot it because I studied it 16 years ago and didn't use it until now. The shannon equation describe the maximum capacity limit in theory, but in fact for CDMA, say 5MHz and 3.84Mcps, it is far below the shannon capacity. So in fact the (...)
Hello all, In my project, I am trying to achieve near shannon performance for 4x4 MIMO using 16 QAM on rayleigh fading channel. For that i need to calculate the shannon capacity of rayleigh fading channel for 4x4 MIMO. Whats the formula/approach for that? Is this code doing it right way?
I have similar question. How to simulate capacity of channel? Using shannon's limit, I have obtained the capacity. I plotted capacity v/s SNR. But my question is how to simulate? I want to simulate/show that above the maximum data rate, there is loss/error. I want to simulate the way simulate BER. I request (...)
QPSK is only a modulation scheme. i.e. the Eb/No in shannons theorem becomes Es/No. i.e Eb/No= Es/No *1/R . for QPSK we transmit twoice the number of bits as BPSK i.e. M=2. channel capacity theorem a.k.a. shannon's Theorem.
does any body know the capacity of a communication link based on QPSK modulation; how is it related to the shannon theorem? When a modulation scheme is used, we call the "capacity" the achievable rate. In the case of QPSK, the maximum achievable rate is 2 bit/channel use. On the other hand, when the (...)
In my opinion, the effect of noise is that we can not transmit information over any channel with an unbounded rate, that is every channel has a capacity, just as shannon's celebrated channel coding theorem states.
the shannon's law R=BWlog2(1+C/N) in a PSSS system Is R the symbol rate here? and BW is still the channel bandwidth? Thanks!
What is the relations between shannon theorwm and channel coding?
use shannon-Hartly Theorem to find the channel capcity of a channel
your question is vague. try rephrasing it. P.S: Are you looking for shannon's channel capacity theorem?
Hi,, man Q refers to the Quality factor or the selectivity of the Resonant circuit, Selectivity is the reciprocal of Bandwidth,, whereas the bit rate is the channel capacity, which refers to shannon's capacity formula such that: C = B log base 2 (1+SNR) Where, C = channel (...)
Bandwidth is the range of frequency that suffers an atenuation less than 3db when the signal pass throught the channel. channel capacity is the maximum information rate that a channel is able to transmite/receive. The channel capacity and the bandwidth of a channel is (...)
According to shannon's theorem the channel capacity in a AWGN channel is given by: C=B log(1+S/N). I have a doubt : Is C given in Bit rate ( Bits/sec) or Bauds (Symbols/sec) , if it is given in bit rate, I am not able to understand how the modulation schemes can be related to this equation. Could anyone please give an ex
my professor told that there is no "shannon's channel capacity law" for the 'cooperative network'. i m very much interested in it. is there any white papers or books relating this topic.
in the information theory u have the shannon's theorems. it states: C = BW. log(1+SNR) i.e; capacity of the channel is related to bandwidth and SNR of the signal and noise. and capacity is related to Hs (Antrpy of the source ) and Rs (Symbol rate). for more detailed discussion refer to "digital communication " books. (...)
what is 0.188 dB? SNR or energy per bit(Eb/N0)?? What the text book do you read? The shannon limit is -1.6 dB (Eb/N0) regardless modulation schemes. Also the rate 1/2 is a rate for BSC channel whose the maxmimum capacity is one. This is in the different part of the system.
what is meant by cooperative networks in mobile communication. I heard that there is no shannon channel capacity law for this network yet, is it so.