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Just a hack.
Plot your first three curves in one Matlab figure and show the legend for these 3 curves. Then, in another Matlab figure (e.g., you can create a new figure in Matlab with the command "figure"), you plot the fourth one. Then, copy the fourth curve and paste it to the previous...
Re: Outage Probability
Outage probability is a crude measure of performance. It is defined as the probability when mutual information is less than the given threshold.
The importance of outage probability is that when outage occurs, there is more likely to have decoding failure. In other...
uplink+frequency+for+gsm900
That makes sense. The mobile phone is powered by battery and we want our battery goes as long as possible. Less path-loss in the uplink (operating with smaller frequency) means that, to maintain the same receive power, the mobile phone needs to transmit less power...
Re: TD-SCDMA
As far as I know, there is no TD-SCDMA specific documents on PHY. However, following tutorial paper should give you the flavor of TD-SCDMA. (This paper is about TD-CDMA, which is of higher chip-rate than TD-SCDMA, aka High Chip Rate TDD.)
The TD-CDMA based UTRA TDD mode
Haardt, M...
lte simulator
There is a simple SC-FDMA simulator in Matlab central
https://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=20454&objectType=File
Hopefully this will give an idea of LTE uplink.
wimax sampling factor
The sampling factor 8/7 in Wimax is used to increase data rate. The story is that in Wimax there is guard tone at each end of IFFT (the number of guard tone has some historic reasons. Anyway, it is kind of fixed.). It is found out that in doing so we are too conservative...
Re: IEEE802.16e
The main difference is that 16e introduces the support of mobility. Thus, the 16e is more like a traditional cellular system. This is in constract to 11 which just provide local access.
As to the new tech, OFDMA is applied.
Well, this is hot in the sense that everyone uses this sentense "... is unkonwn."
If you are not a genius, you'd better keep an eye on the development on this topic, but never work on it. The reason is simple, over last thirty years, many able resesearcher have worked on this and yet they still...
Re: Channel Coding
The essence of channel coding is to introduce redundancy to the information bits, and this is achieved, indeed, by averaging out the uncertainty of the channel (e.g., fading or AWGN). Now it is obvious that to get a better averaging result, we need more lengthy code.
This...
In the jargon of IEEE 802.16e, the subchannel referres to a group of physical subcarriers.
Basically this definition is helpful to MAC layer, which allocate resources on subchannel, i.e., it has no direct access to the physical subcarriers.
The mapping of subchannel (group of subcarriers0 to...
Now you need to look at the problem from frequency domain. Basically, you will end up with an integral over frequency with the intergrand in the form of log(1+something).
It is not a new problem and if I remember correctly, you can find the exact answer in text book by T.Cover or by R.Gallager.
what is multiplexing gain
If you mean multiplexing gain in MIMO context...
When MIMO is proposed it is shown to achieve higher rate than SISO. How to measure the gain? Well, from Shannon theorem we know that for an SISO link, the capacity is given by log(1+SNR) and for the m by n MIMO system...
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