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Hello i need a matlab code about combinaition of OFDM/CDMA ... 24 Mar 2010 07:41
Best way to remove a known frequency
Hi, I'm having problem getting rid of a 2kHz sine wave from a digitized signal at 128kHz. I do know the exact frequency of the 2kHz (I generate it in the first place with a DDS), but the phase/amplitude are unknown (it goes through DAC->ADC. Now, there seems to be two approach to do this, and I don't know what wou... 25 Mar 2010 10:14
How to rapidly read a Pole-Zero Diagram?
When there are only one or two poles or zeros in a diagram(for a digital filter), it's easy to know its frequency response, the method have been introduced by Many DSP books. But when many poles and zeros appear in one diagram, how can we see its frequency response at a glance? Is there any book about it? ... 23 Mar 2010 12:26
equalizer in matlab
It seems that the training symbols have to use the same modulation as the data symbols. Is there any way that I can use different modulations? say QPSK for training and 16QAM for data. I tried equalizing the two parts separately with a constellation change in between. The shape of the equalized constellation se... 23 Mar 2010 03:26
channel estimation ofdm
The correlation factor between two channel states is equal to rho=(2*pi*fd*t). In what i read t is the time difference between the moment of channel estimation and transmission. In an OFDMA system would this value be equal to one frame length, several symbol lengths does it depend on the positioning of the pilots. I am... 22 Mar 2010 22:59
carrier synchronization for CPFSK demodulation
I was wondering how to do carrier synchronization for CPFSK signals? I want to decode the CPFSK signal by computing the phase difference. The shape of the phase difference is similar to the following plot |---| |---| fc+fd/2 - - -|- -| - | - | - - - fc ---| |---| |--- fc-fd/2 where f... 25 Mar 2010 10:14
DSK 6713 - Simulink/Code Composer
Hello, I am trying to generate code using simulink in Code Composer with a simple model for DSK6713, with a ADC directly connected to a DAC. I have Matlab 7.9.0 (R2009b), Code Composer 3.3 and DSK 3.1. When I try to generate code in Code Composer appears: "untitled.h", line 25: fatal error: could not o... 22 Mar 2010 16:47
alternatives to correlation
Hi. What are the alternatives we have to cross-correllation ? If I want to find degree to similarity between two sampled signals what options do I have besides doing the obvious correlation?? Thanks in advance ... 24 Mar 2010 15:49
Zero Padding for Non-Causal Filters
I am implementing a non-causal filter in the frequency domain. The filter frequency response is defined by an analytic function. To ensure that the result corresponds to linear convolution, I must zero pad the input and impulse response to L+P-1 samples. This is easy enough for the input signal. However, I don't ... 23 Mar 2010 20:35
DSK 6713
Hello, I am looking for user's who have already use the "TMS320C6713 DSP Starter Kit". I am trying to generate code using simulink in code composer. I am using Matlab 7.9.0 (R2009b) and Code Composer 3.3 with DSK 3.1. I have already download all libraries from Texas Instruments ( 22 Mar 2010 16:47
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