Breaking News
Comments
Newest First | Oldest First | Threaded View
OfficeSpace
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
OfficeSpace   2/27/2011 3:03:21 AM
NO RATINGS
Thanks Frank, you just did the kids homeWork. These young-guns need to stay w/the discretes, fully understood. What isn't in an IC package at this date in one form/purpose/function or another.

gagikk
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
gagikk   2/15/2011 11:32:29 AM
NO RATINGS
I'm only doing a project with them. I thought it may be useful.

old account Frank Eory
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
old account Frank Eory   2/11/2011 6:02:01 PM
NO RATINGS
Nice to see there IS somebody making modulator & demodulator building block ICs. Thanks for posting the link to your company's website.

gagikk
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
gagikk   2/10/2011 1:33:11 PM
NO RATINGS
have a look on CMX1763, CMX998. www.cmlmicro.com

old account Frank Eory
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
old account Frank Eory   2/7/2011 8:26:16 PM
NO RATINGS
Bao, the functions you mentioned -- symbol mapper, etc. -- are usually integrated in a single IC, not sold as separate components. Most of the modem functions can be implemented digitally on an FPGA, or better yet, one FPGA for the transmitter and another one for the receiver. If you focus on the system design & digital implementation, you should discover that the only other components you need besides the FPGAs are A/D and D/A converters and amplifers.

t.alex
User Rank
Rookie
re: 16QAM/QPSK Communication Systems Design
t.alex   2/7/2011 9:00:04 AM
NO RATINGS
I think maybe start with overall diagram concept then break down into components.

eewiz
User Rank
CEO
re: 16QAM/QPSK Communication Systems Design
eewiz   2/6/2011 4:21:22 PM
NO RATINGS
Homework? Anyway check the below sites. It might help. http://www.newark.com/ http://www.digikey.com/ http://www.mouser.com/ http://www.farnell.com/

BLCOMM
User Rank
Rookie
16QAM/QPSK Communication Systems Design
BLCOMM   2/6/2011 9:15:12 AM
NO RATINGS
I am Bao, a student at California State University, Long Beach. This is my project requirements: Design a digital communication system capable to transmit digital signal using both QPSK and 16QAM signaling schemes. Data rate about 100 kbps. Input signal to transmitter is human voice, and output signal will be stored in the receiver and then played out from a speaker. Channels will be both wire and wireless. I need help in finding ICs for my project (symbol mapper, quadrature modulators, quadrature oscillators, …)



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Vetinari Clock: Decisions, Decisions, Decisions …
Max Maxfield
24 comments
Things are bouncing merrily along with regard to my uber-cool Vetinari Clock project. The wooden cabinet is being handcrafted by my chum Bob (a master carpenter) using an amazing ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
2 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...