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Post subject: BPSK MODULATOR DESIGN Posted: Fri Oct 07, 2005 9:46 pm

Hi friends,

I want to design BPSK modulator for my communication system.I am very new to this stuff.I want to modulate 2 signals like one is information signal 1 khz freq while other is PN code 1 MHz freq ,and i want to modulate this signal using BPSK technique,but i dont have any idea about how to implement BPSK in hardware.

Could you please let me know that how can i achive this BPSK modualtion using hardware?could you please send me some basic idea, circuit or somthing which can help me to move ahead ?





Post subject: Posted: Sat Oct 08, 2005 12:30 am

Step number 1.



Post subject: Posted: Sat Oct 08, 2005 12:34 am

Buy a 1k ohm resistor.

Let me know when you've done that and I'll tell you the next step.


Another Guest

Post subject: BPSKPosted: Sun Oct 09, 2005 7:02 pm

You need either a double-balanced mixer (see www.minicircuits.com) or its digital equivalent, the exclusive-OR gate. Exor your 1kbps data with your 1 Mbps PN stream, then go to your modulator (dbm or exor) at whatever frequency you need..

Good Luck!



Post subject: BPSK modulatorPosted: Mon Oct 10, 2005 3:26 am

Anonymous wrote:

Buy a 1k ohm resistor.

Let me know when you've done that and I'll tell you the next step.

Hi ,I have 1 K resistor with me.

could u please let me know the next steps in detail?





Post subject: bpsk modulatorPosted: Mon Oct 10, 2005 3:50 pm

Hi guest,

i do have 1 K resistor wid me cud u please let me know the next step?




Can - Helper

Post subject: Posted: Sun Oct 16, 2005 9:36 pm

Use double balanced mixer (DBM) with DC - Fmax response. Also find out more about DC offset.



Post subject: BPSK ModPosted: Sat Oct 29, 2005 1:08 pm

Did you ever try using a MAXIM device such as the MAX2900? They have an evaluation board available.


It's better then a 1K resistor.


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