Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to implement DDC in Matlab?

Status
Not open for further replies.

plc

Member level 1
Joined
Apr 13, 2006
Messages
40
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,534
matlab ddc

for example in a communications system the the signal band may only be narrow, KHz wide, but the signal band could be centered at RF frequencies, at many MHz. If the signal is sampled according to the Nyquist criterea, i.e. twice the highest frequency, then the data rate for the RF signal will be very high. Processing the data at this high
rate is both difficult and expensive in terms of the amount of hardware required. A DDC will select the
frequency band of interest and shift it down in frequency, which allows the data rate required to retain all the information to be much lower, and consequently reduces the complexity of any further processing.

DDC is a digital downconverter. it is implemented in order to reduce the data rate for further processing. it comprises a "digital mixer" i.e. a complex multiplier followed by aN FIR lowpass filter. the LPF is followed by a decimator.
 

    snoopy_nom

    points: 2
    Helpful Answer Positive Rating

Nosheen

Member level 1
Joined
Aug 2, 2007
Messages
37
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,568
ddc in matlab

chek for DDC for satellite...
will help u a lot
 

plc

Member level 1
Joined
Apr 13, 2006
Messages
40
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,534
ddc fir mixer matlab

can u plz provide the link?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top