wen He wrote:
>
>>
>>
>> On Wed, Jan 23, 2013 at 4:11 PM, Zhiwen He wrote:
>>
>>> you mean that i need to add an access code for the system, or just leave
>>> blank?
>>
>>
> There is a default 64-bit access code that is used when you le
On Wed, Jan 23, 2013 at 4:11 PM, Zhiwen He wrote:
> you mean that i need to add an access code for the system, or just leave
> blank?
>
> how to make the system better? I mean that, for example, when the SNR< 20,
> there are too many errors for the packet decoder, it doesn
Hello all,
i'm working on the digital modultaion, and i build a system like this:
random source -> packet encoder -> qam mod -> (adder and noise source) ->
qam demod -> packet decoder ->file sink
I found that, when the amplitude of the noise is low, there will be some
data in file sink, but whe
Hello all,
I tried to use this grc file to test the bit error rate for the different
digital modulation method, but it doesn't work so well.
When **I set Gray Code(No), Diff Encoding(No), the BER of QAM Mod and
Demod is 0.
In the other case, the BER is not 0.
Do I need any block else to make i
hello all,
When I use the fft blcok, it seems not right.
I build the test system like this: Square source -> IFFT -> FFT -> File
Sink, when the input is 1, the output in the file sink is 1, and when the
intput is 0, the output is random, sometimes 0, sometimes between -1 and 1.
Like this:
i
