HD Radio - Automaker Support

[pianoplayer88key]

I picture an old cop-car 'bubblegum machine' single rotating beacon light case on the car roof with a ferrite bar antenna floating on slip rings inside of it and a little servo motor tied to an electronic compass that remembers signal strength for each AM radio preset - or when your foot is on the brake it rotates the bar for max AM signal strength and remembers the rotation angle - how's that for an idea to patent?

I'd like to see an array of receive antennas (2 of which may be ferrite bar antennas - 1 running the entire length of the car, bumper-to-bumper, the other the entire width of the car and rotatable, others may be phasable vertical whips). They would optimize reception based on GPS coordinates (receiver to transmitter), while taking into account undesired interference from co-channel and adjacent interference, as well as overload from close proximity to transmitters. I'd be nice if they could have a narrow enough directional pattern to pick out an individual station on the graveyard channels and make it sound like class 1-A channels used to be in the 50s or so.

 

[rbrucecarter5]

I picture an old cop-car 'bubblegum machine' single rotating beacon light case on the car roof with a ferrite bar antenna floating on slip rings inside of it and a little servo motor tied to an electronic compass that remembers signal strength for each AM radio preset - or when your foot is on the brake it rotates the bar for max AM signal strength and remembers the rotation angle - how's that for an idea to patent?

Or why not just put two ferrite bars at right angles, and have two tuned antenna stages, summed together at the first RF? Sort of an AM diversity antenna system, with a reception pattern similar to an FM turnstile antenna.

 

[Ai4i]

Or why not just...

Because one would need to be delayed λ/4 behind the other, from a twelve story condominium at the top of the band to a forty story office tower at the bottom.

 

[rbrucecarter5]

Or why not just...

Because one would need to be delayed λ/4 behind the other, from a twelve story condominium at the top of the band to a forty story office tower at the bottom.

Sounds like an easy job for a DSP

 

[Ai4i]

Sounds like an easy job for a DSP

We, the royal plural, must plead ignorance: not knowledgable enough to comment on how one applies digital techniques to delaying RF without introducing other issues.

 

[MarioMania]

Do people care about HD Radio in there cars??

Seems like everyone has there Ipod in there car

 

[rbrucecarter5]

Do people care about HD Radio in there cars??

Seems like everyone has there Ipod in there car

I have satellite, HD, and iphone connection in my car, so I can stream as well as listen to my library of songs.

 

[landtuna]

Do people care about HD Radio in there cars??

Seems like everyone has there Ipod in there car

As I have said many times before, I enjoy listening to a real radio station with a real jock (live or VT) versus listening to my personal collection of several thousand favorite songs. I especially enjoy hearing a "moldy oldie" that I have forgotten or haven't heard in decades.

So, yes, I enjoy HD radio if only because it has content that fits me personally.

 

[tomservo]

iPod connectors in cars, now that is something that angers me more than the troubles with HD radio. Why would they install a completely locked down and proprietary connector that only works with one brand of device when they could just as easily install a simple AUX jack that would play audio from tens of thousands of devices instead?

Some car manufacturers get it and include both, but a lot only go the Apple route and it sucks for those of us who prefer more powerful, higher quality sounding playback devices. I don't expect pristine audio from analog or HD radio but I do from my own personal playback devices and that immediately rules out anything from Apple.