DSP

GMSK Simulation
Hi there, I am currently working on a GMSK Simulation whereby i will need to simulate the raw binary bits -> NRZ -> Convolve NRZ with Gaussian Pulse -> (I+Q)*modulator -> GMSK Modulation. However, i am stuck in the integration of the NRZ and convolution of NRZ and Gaussian Pulse. Please kindly advice. Regar... 9 Nov 2005 21:43

FSK Demod using Quadrature Receiver with matched filters
I created a Matlab M-file for a FSK demodulator using a Quadrature Receiver with 4 matching filters. The code is found below. I need someone to verify that this code works or to point out any problems. Also, if there is anything I can do to make it stronger and better, then I would like to hear about it. My cu... 9 Nov 2005 21:43

Phase Unwrap in FPGA?
Hello, I have a dig receiver architecture and I need to generate frequency from the phase. The phase (atan2) is computed using a CORDIC (magnitude is used for another part of the architecture, so CORDIC makes sense for me), which does not perform phase unwrapping to attain continous phase prior to differentiatio... 3 Nov 2005 12:02

What is the best modulation scheme?
Hello all, What kind of modulation scheme that will suit high speed transmission (at least to 1 Gbps)? And obvious choice will be those highly spectral efficient modulation scheme like OFDM. However, if the linearity requirement and the sensitivity to phase noise are very high, then OFDM could be out of questio... 1 Nov 2005 15:02

Decoder for Tail-Biting Convolutional Code
Could someone please tell me how to implement a decoder for a tail-biting convolutional code? I've been working on it all day and can't figure it out. My basic approach bas been to take a Viterbi decoder and modify it such that it does not assume the initial state is 0. This works about 50% of the time. When ... 25 Oct 2005 17:04

EMIF DSK6713
Hello, we are designing an interface between the DSK6713 Board and a DDS board from Analog Devices with an 8-bit data and 5-bit address interface. I already used the same code another time for a DSign.T module (it contains a C6713 DSP) and there it worked. The problem is that the program seems to write alway... 24 Oct 2005 16:37

FFT Averaging
Hi. I am implementing some FFT software and I'm pondering different ways of averaging FFTs.. Normally most people average the amplitude of each FFT to reduce the variance of the noise. It so happens that in my application we are sampling synchronously with the signal we are interested in (and it's centre-... 24 Oct 2005 10:51

FM Demodulation Woes
Hi All, I have been working for some time now on making a multichannel FM demod / remod, and I have finally gotten my hands on some test equipment to put this design through its paces and have found that I have a strange problem. To start with I will outline the design that I am using.. I undersample the F... 23 Oct 2005 20:16

SAA7105
1444398326 Hi Could somebody give a working example that does not use DSP/BIOS framework/drivers and displays the captured frames in some way on a (VGA) output of SAA7105 encoder? Thanks in advance Vladimir mailto:vladimir.mish(a)tochka.ru ... 19 Oct 2005 06:40

SAA7105
Hi Could somebody give a working example that does not use DSP/BIOS framework/drivers and displays the captured frames in some way on a (VGA) output of SAA7105 encoder? Thanks in advance Vladimir mailto:vladimir.mish(a)tochka.ru ... 19 Oct 2005 06:40