I am designing a broadband radio with all decoders implemented in software.
So far I have developed AM, FM, SSB, CW and DRM (digital radio) software
methods for reception. I would also like to include iBiquity digital for the
AM and FM bands. My guess is that IBOC is a variation of OFDM transmission,
but so far the details seem deliberately evasive. Any one with more details?

I think that IBOC is headed for oblivion. Would like to see how it performs
before it dies. There are no commercial radios that I would want to buy for
HD radio, they all seem like a mind-numbing waste of money. My only interest
is a home brew software version integrated into a multimode receiver.

"numeric" wrote in message
...
I am designing a broadband radio with all decoders implemented in software.
So far I have developed AM, FM, SSB, CW and DRM (digital radio) software
methods for reception. I would also like to include iBiquity digital for
the
AM and FM bands. My guess is that IBOC is a variation of OFDM
transmission,
but so far the details seem deliberately evasive. Any one with more
details?

I think that IBOC is headed for oblivion. Would like to see how it
performs
before it dies. There are no commercial radios that I would want to buy
for
HD radio, they all seem like a mind-numbing waste of money. My only
interest
is a home brew software version integrated into a multimode receiver.



Seems to be proprietary technology. Imagine that! The US government
literally giving away public airwaves; that means they will have
licensing fees for the transmitting equipment, and any receiver made
that will work will IBOC. Wonder where this leaves the
experimenter?

On Tue, 14 Aug 2007 06:11:06 -0400, Uncle Peter wrote:


"numeric" wrote in message
...
I am designing a broadband radio with all decoders implemented in software.
So far I have developed AM, FM, SSB, CW and DRM (digital radio) software
methods for reception. I would also like to include iBiquity digital for
the
AM and FM bands. My guess is that IBOC is a variation of OFDM
transmission,
but so far the details seem deliberately evasive. Any one with more
details?

I think that IBOC is headed for oblivion. Would like to see how it
performs
before it dies. There are no commercial radios that I would want to buy
for
HD radio, they all seem like a mind-numbing waste of money. My only
interest
is a home brew software version integrated into a multimode receiver.



Seems to be proprietary technology. Imagine that! The US government
literally giving away public airwaves; that means they will have
licensing fees for the transmitting equipment, and any receiver made
that will work will IBOC. Wonder where this leaves the
experimenter?

Getting a sore ass, as usual :-(

Yay hackers!

On Tue, 14 Aug 2007 05:23:55 +0000, numeric wrote:
I am designing a broadband radio with all decoders implemented in software.
So far I have developed AM, FM, SSB, CW and DRM (digital radio) software
methods for reception. I would also like to include iBiquity digital for the
AM and FM bands. My guess is that IBOC is a variation of OFDM transmission,
but so far the details seem deliberately evasive. Any one with more details?

I think that IBOC is headed for oblivion. Would like to see how it performs
before it dies. There are no commercial radios that I would want to buy for
HD radio, they all seem like a mind-numbing waste of money. My only interest
is a home brew software version integrated into a multimode receiver.

There are technical "white papers" on the Ibiquity website, but I don't
think they provide enough details to implement a decoder. As other
replies have indicated, they consider this proprietary. (I wonder if
there are enough details in the patents?) I suspect you're going to find
the only way to implement a homebrew IBOC receiver is to acquire an
evaluation chipset.

The White Papers confirm that OFDM is used. If I read it properly (and I
may well not) the FM scheme uses 180 subcarriers and the AM 108. (in both
cases in Hybrid Mode where the analog is still present. Both AM and FM
support a full-digital mode with more subcarriers.)